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WO2019103575A1 - Mélange d'électrode positive, électrode positive le comprenant et batterie secondaire au lithium - Google Patents

Mélange d'électrode positive, électrode positive le comprenant et batterie secondaire au lithium Download PDF

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Publication number
WO2019103575A1
WO2019103575A1 PCT/KR2018/014724 KR2018014724W WO2019103575A1 WO 2019103575 A1 WO2019103575 A1 WO 2019103575A1 KR 2018014724 W KR2018014724 W KR 2018014724W WO 2019103575 A1 WO2019103575 A1 WO 2019103575A1
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WO
WIPO (PCT)
Prior art keywords
positive electrode
weight
platinum
secondary battery
mixture
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2018/014724
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English (en)
Korean (ko)
Inventor
송주용
김석구
김인철
김주리
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LG Chem Ltd
Original Assignee
LG Chem Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by LG Chem Ltd filed Critical LG Chem Ltd
Priority to US16/607,309 priority Critical patent/US11316149B2/en
Priority to PL18881949T priority patent/PL3598535T3/pl
Priority to EP18881949.4A priority patent/EP3598535B1/fr
Priority to JP2019554642A priority patent/JP6827559B2/ja
Priority to CN201880023953.6A priority patent/CN110506349B/zh
Priority claimed from KR1020180148220A external-priority patent/KR102434256B1/ko
Publication of WO2019103575A1 publication Critical patent/WO2019103575A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to a positive electrode and a lithium secondary battery including the positive electrode mixture.
  • an electrode active material capable of reversibly intercalating and deintercalating lithium ions is applied to the negative electrode and the positive electrode, respectively, and the transfer of the lithium ion through the electrolyte is realized. By the oxidation and reduction reactions at the respective electrodes, .
  • Lithium ions which are released (battery discharged) after inserting into the negative electrode (battery charging) and lithium ions which can not be recovered (discharged from the battery) after being desorbed from the positive electrode (battery discharge) are inevitably generated. This is linked to the irreversible capacity of the two electrodes.
  • the positive electrode mixture of this embodiment comprises the larium peroxide (Ni 0 ) and the additive comprising the platinum;
  • the positive electrode active material and the conductive material robol 100% by weight of the platinum and the conductive material in the total amount, by controlling the amount of the platinum is less than or equal to 20% by weight of at least 7% by weight,
  • step or step 5 of the degree used throughout the specification does not imply a step for.
  • combination (s) thereof in the expression of the machine form means one or more mixtures or combinations selected from the group consisting of the constituents described in the expression of the machine form, And the like.
  • the cathode mix according to one embodiment of the present invention, based on experimental evidence, comprises 15 cathode active materials; Conductive material; And an additive including lithium peroxide (Ni 0 ) and platinum (E), wherein the content of the platinum in the total amount of 100 wt % of the platinum and the conductive material is 7 wt % to 20 wt % .
  • the one embodiment of the platinum and 100% by weight of the conductive material in a total amount as a positive electrode material mixture the amount of the platinum or more specifically 8 wt% more or less to 20% by weight of at least 720% by weight 17 % by weight or less, more specifically 10 % by weight or more, and 15 % by weight or less,
  • a silicon-based negative electrode active material having a larger theoretical capacity than the 30 carbon- When applied, the irreversible capacity imbalance of the two electrodes is increased, and the charging capacity of the anode before and after the initial charging can be reduced.
  • One embodiment of the present invention provides a positive electrode material mixture, which is derived from the above-described problem recognition, which can cancel the irreversible capacity imbalance of the two electrodes and increase the initial efficiency of the anode by five.
  • the positive electrode mixture of this embodiment includes an additive including Li.sub.2 O.sub.3 Li.sub.0 ) and platinum ( Pt) , thereby effectively canceling the irreversible capacity imbalance of the two electrodes and further increasing the initial charge capacity of the anode.
  • the lithium peroxide ( Li 0) contains an excessive amount of lithium in comparison with a conventional positive electrode active material having a molar amount of 1 mol, and can discharge such excess lithium.
  • the lithium peroxide ( Li ()) is capable of irreversibly releasing lyrium ion and oxygen.
  • the reaction can be irreversibly released by the ion Lyrium with two moles of oxygen to the oxygen generating reaction of Scheme 1 15 (Oxygen Evolution Reaction, 0ER), the lithium peroxide (Li 3 ⁇ 4) 1 mol per mol.
  • Lyrium peroxide (Li 0) is a lithium secondary battery is added to the positive electrode is able to reduce the irreversible capacity in the initial charge and discharge negative electrode and is the irreversible capacity unbalance of the negative electrode and 20 the anode solved accordingly increase the initial efficiency of the positive electrode have.
  • the platinum ( Pt) is applied as a catalyst to improve the efficiency of Scheme 1 . That is, it is the case that, in addition to the positive electrode 30, the addition of the platinum to the ridge tumpeo oxide in the event that alone is added to the positive electrode of the lithium peroxide, the efficiency of the scheme 1 increases. This is because lithium peroxide (Li 0) is according as the progress of the oxygen generating reaction (Oxygen Evolution Reaction, 0ER) of Scheme 1, the platinum is to act as a reaction catalyst, to contribute to the reaction efficiency of the scheme 1.
  • the cathode active material when the cathode active material is not extremely mixed but the initial performance of the battery is improved and the long- Depending on the characteristics, the cathode active material may be mixed with the anode additive of one embodiment in an appropriate blending ratio.
  • the positive electrode active material Conductive material; And an additive including lithium peroxide ( Li 0) and 25 platinum ( Pt) , wherein the content of the platinum in the total amount of 100 wt % of the platinum and the conductive material is 7 wt % to 20 wt % even if the control to be specifically less than 17% by weight or more than 8% by weight% by weight or less, it is inferred that there is an initial charge capacity of the anode effect remarkably improved.
  • Li 0 lithium peroxide
  • Pt platinum
  • the content of the conductive material in the weight ratio of lithium peroxide: platinum to the positive electrode mixture may be considered.
  • the weight ratio of the lithium peroxide and the platinum is from 100: 0.1 to 100: 50, for example from 100: 0.5 to 100: 20, 100: 1 to 100: 10 or 100: 7 - 100 : 20 .
  • the content of the conductive material in the positive electrode mixture may range from 0.1 to 10 % by weight , for example, from 0.5 to 3 % by weight based on the total amount of the positive electrode mixture ( 100 % by weight).
  • the positive electrode in the conductive material content of the positive electrode material mixture a total amount of mixture (100 wt%) of the 0.1 to 10 % by weight, for example 0.5 to 3 % by weight;
  • the content of the platinum in the total amount of 100 wt % of the platinum and the conductive material is 7 wt % to 20 wt %, more specifically 8 wt % to 17 wt % , more specifically 10 wt % to 15 wt % ;
  • the total platinum () and a positive electrode additive comprising the lithium peroxide (Nishi 202) may be from 1 to 20% by weight, for example 1 to 10% by weight or 5 to 10% by weight.
  • the initial charging capacity of the anode can be further increased when the respective content ranges are simultaneously satisfied, but the present invention is not limited thereto. Manufacturing method of additive
  • the raw materials and the methods for producing the additive are not particularly limited.
  • each of powders of lyrium peroxide (Ni 202 ) and platinum () may be used as a raw material, and these powders may be dry-mixed to form a simple mixed powder as a positive electrode additive of the above embodiment.
  • the positive electrode additive of this embodiment is mixed with a simple mixed phase 2019/103575 1 » (: 1 ⁇ ⁇ 2018/014724
  • each powder of lithium peroxide (Ni 4 ) and platinum (La) is dried together with other cathode mix components (for example, cathode active material conductive material and / or binder) Can be mixed.
  • cathode mix components for example, cathode active material conductive material and / or binder
  • each powder of lyrium peroxide (Ni 0 ) and platinum (E) may be first dry mixed and then dry mixed with the other 5 cathode mix components.
  • the positive electrode additive of the embodiment can also be produced by a method commonly known in the art.
  • Types of conductive materials are not limited.
  • the kind of the conductive material is not particularly limited.
  • the conductive material is used for imparting conductivity to the electrode. Any conductive material may be used without causing any chemical change.
  • the conductive material include natural graphite, artificial graphite carbon black, acetylene black ketjen black Carbon fiber, metal powder such as copper, nickel, aluminum, and silver, metal fiber
  • the kind of the positive electrode active material is the kind of the positive electrode active material
  • 25 is not particularly limited as long as it is a material capable of reversibly intercalating and deintercalating lyrium ions, which comprises at least one of a metal of cobalt, manganese, nickel or a combination thereof, and a complex oxide of lyrium. g., cobalt, nickel or manganese metal of a combination thereof; it may be one containing at least one of composite oxide of; and Li
  • any of the following formula as the positive electrode active material 2019/103575 1 » (: 1 ⁇ ⁇ 2018/014724
  • the coating may comprise, as a coating element compound, an oxide hydroxide of the coating element, an oxyhydroxide of the coating element, an oxycarbonate of the coating element, 2019/103575 1 » (: 1 ⁇ ⁇ 2018/014724
  • the coating layer forming step may be carried out by any of coating methods such as spray coating, dipping, and the like without adversely affecting the physical properties of the cathode active material by using these elements in the above compound. It is a content that can be well understood by people engaged in the field, so detailed explanation will be omitted.
  • the content of the cathode active material in the total amount of the cathode mixture may be 80 to 99.5% by weight regardless of the kind of the cathode active material. However, But is not limited thereto.
  • the positive electrode material mixture of one embodiment may further include a binder.
  • the binder serves to adhere the positive electrode active material particles to each other and to adhere the positive electrode active material to the current collector.
  • Typical examples thereof include polyvinyl alcohol, carboxymethyl cellulose, hydroxypropylcellulose,
  • the positive electrode material mixture of this embodiment can be generally manufactured by a method known in the art, and a detailed description thereof will be omitted.
  • a positive electrode comprising the positive electrode mixture described above, and a lithium secondary battery including such a positive electrode.
  • the lithium secondary battery of the embodiment is a lithium secondary battery in which the above-described positive electrode additive is applied to the positive electrode, the initial irreversible capacity of the negative electrode decreases, the initial efficiency of the positive electrode increases, Can be excellent.
  • the lithium secondary battery in a normal temperature from 2.5 to 4.25 V (: VI you / your +) charge capacity of the positive electrode hansanggi once filled with the 600 m ⁇ h / g or more, specifically
  • the present invention can be generally carried out according to matters known in the art.
  • the positive electrode of one embodiment may include a positive electrode collector and a positive electrode mixture layer disposed on the positive electrode collector and including the positive electrode mixture described above.
  • examples anode the one implementation may be prepared by the positive electrode collector to the entire image, applying the mixture of the electrode material mixture of the aforementioned 20, the positive electrode additives conductive material, the positive electrode active material, and / or binder and then drying, if necessary, , A filler may be further added to the mixture.
  • the cathode current collector may be formed to have a thickness of 3 500 < 0 >.
  • the positive electrode current collector is not particularly limited as long as it has a high conductivity of 25 without causing a chemical change in the battery.
  • the positive electrode current collector may be made of stainless steel, aluminum nickel titanium-fired carbon, or a surface of aluminum or stainless steel Treated with carbon, nickel titanium, silver, or the like may be used.
  • the current collector may have fine irregularities on the surface thereof to increase the adhesive force of the cathode active material, and various forms such as a film, a sheet foil, a net, a porous body 30, a foam nonwoven fabric, and the like are possible. 2019/103575 1 » (: 1 ⁇ ⁇ 2018/014724
  • the conductive material is usually added in an amount of 1 to 50 % by weight based on the total weight of the mixture containing the cathode active material.
  • the conductive material is not particularly limited as long as it has conductivity without causing chemical changes in the battery, Graphite carbon black such as natural graphite or artificial graphite carbon black such as acetylene 5 black ketchen black channel black and black carbon black such as carbon black which is conductive fiber carbon fiber such as carbon fiber or metal fiber black metal powder such as nickel powder zinc oxide , And conductive whiskey titanium oxide such as potassium titanate, and the like can be used.
  • the graphite-based material having elasticity may be used as a conductive material, and may be used together with the materials.
  • the binder is a component that assists in bonding of the active material and the conductive material and bonding to the current collector, and is usually added in an amount of 1 to 50 wt % based on the total weight of the mixture containing the cathode active material.
  • binders include
  • polyvinylidene fluoride polyvinyl alcohol, carboxymethylcellulose 01 starch, hydroxypropylcellulose, regenerated cellulose, polyvinylpyrrolidone, tetrafluoroethylene, polyethylene, polypropylene, ethylene-propyleneglycol and the like ⁇ 3 ⁇ 41, styrene beuti butylene rubber, fluoro rubber and various copolymers:-diene terpolymer (£ ⁇ , sulfonated £.
  • the filler is not particularly limited as long as it is a fibrous material which is used selectively as a component for suppressing the expansion of the anode and does not cause chemical change in the battery.
  • the filler include olefin polymers such as polyethylene and polypropylene; Fibrous materials such as glass fibers and carbon fibers are used.
  • the negative electrode includes a current collector and a negative electrode active material layer formed on the current collector, and the negative electrode active material layer may include a negative electrode active material.
  • the negative electrode active material examples include a carbonaceous anode active material, an alloy of lithium metal lithium metal, 310 x ( 0 ⁇ X ⁇ 2 ), a complex, an alloy (the alkali metal, the alkaline earth metal, the group 13 to 16 element, Metals, rare earth elements or their
  • alkaline earth metal Group 13 to Group 16 elements, transition metals, rare earth element or a combination of, but not 3 ⁇ 41) can be used for the negative electrode active material at least one member selected from the group comprising.
  • the negative electrode collector may generally be made to have a thickness of 3 - 500 .
  • the negative electrode current collector is not particularly limited as long as it has electrical conductivity without causing chemical changes in the battery, and may be formed on the surface of copper stainless steel, aluminum nickel, titanium, sintered carbon, copper or stainless steel carbon, nickel, titanium, is a treatment would be an aluminum surface, such as - cadmium alloys also as in the positive electrode current collector, to form fine 10 uneven surface may enhance the bonding strength between the negative electrode active material, the film sheet , Foil net, porous body foam, nonwoven fabric, and the like.
  • the lithium secondary battery of one embodiment may be a lithium ion battery, a lithium ion polymer battery or a 15 lithium polymer battery depending on the type of electrolyte and / or the type of separator.
  • the separator may be impregnated with the liquid electrolyte.
  • the separator is interposed between the anode and the cathode, and has a high ion permeability and mechanical strength A thin insulating thin film is used.
  • the pore diameter of the separator is generally 20 0.01 10 and the thickness is generally 5 300.
  • Examples of such separator include olefin polymers such as polypropylene, which is chemically resistant and hydrophobic; A sheet or nonwoven fabric made of glass fiber, polyethylene or the like is used.
  • a solid electrolyte such as a polymer is used as an electrolyte, the solid electrolyte may also serve as a separation membrane.
  • the liquid electrolyte can be a non-aqueous electrolyte containing a lithium salt.
  • Additive lithium salt-containing non-aqueous electrolyte is non-aqueous and composed of the electrolyte and Lyrium, the non-aqueous electrolyte is used, such as the non-aqueous organic solvent, an organic solid electrolyte, inorganic solid electrolyte, but only those But is not limited thereto.
  • organic solid electrolyte for example, polyethylene derivatives, polyethylene oxide derivatives, polypropylene oxide derivatives, phosphoric acid ester 10 polymer, poly-edge presentation lysine (a gi tat ion l ysine), polyester sulfide, polyvinyl alcohol, Polyvinylidene fluoride, a polymer containing an ionic dissociation group, or the like can be used.
  • polyethylene derivatives polyethylene oxide derivatives, polypropylene oxide derivatives, phosphoric acid ester 10 polymer, poly-edge presentation lysine (a gi tat ion l ysine), polyester sulfide, polyvinyl alcohol, Polyvinylidene fluoride, a polymer containing an ionic dissociation group, or the like
  • poly-edge presentation lysine a gi tat ion l ysine
  • polyester sulfide polyvinyl alcohol
  • Examples of the inorganic solid electrolyte include Li 3 N , Lil, Li 5 Ni 2, LisN-Li 1- LiOH, LiSiO 4, LiSiO 4 -LiI-LiOH, Li 2SiS 3, Li 4SiO 4 , Li 4SiO 4 -Li I-LiOH , Li 3P04- 15 Li 2S- SiS 2 , and the like can be used.
  • the Li salt is a material that is readily soluble in the non-aqueous electrolyte, for example, LiCl, LiBr, Lil, LiC10 4, LiBF4, LiB1QCl1Q, LiPF 6, LiCF3S03, LiCF3C02, LiAsF e, LiSbF 6 LiAlCU, CH 3S03Li, ( CF3SO2) 2NLi, chloroboranlium, lower aliphatic carboxylic acid lithium, lithium 4-phenylborate, imide, and the like can be used.
  • the lithium salt-containing nonaqueous electrolyte may further contain, for example, pyridine, triethylphosphite, triethanolamine, cyclic ether, ethylenediamine, n-glyme ( gl , e N, N-substituted imidazolidine, ethylene glycol dialkyl ether, ammonium salt, pyrrole, 2-methoxy 25 ethanol , Aluminum trichloride, etc. may be added.
  • a halogen-containing solvent such as carbon tetrachloride, ethylene trifluoride or the like may be further added in order to impart nonflammability.
  • carbon dioxide gas may be further added.
  • FEC Fluoro- Ethylene Carbonate
  • PRS Provide sul tone
  • LiPF 6, LiC10 4 LiBF 4 , LiN (S0 2CF3) 2 , etc. 2019/103575 1 » (: 1 ⁇ ⁇ 2018/014724
  • the lithium salt is dissolved in a high-boiling solvent and a low-viscosity solvent,
  • a non-aqueous electrolyte can be produced.
  • the lyrium secondary battery of the embodiment may be implemented as a battery module including a unit cell, a battery pack including the battery module, and a device including the battery pack as a power source.
  • the device may be, for example, an electric vehicle, a hybrid electric vehicle, a plug-in hybrid electric vehicle or a power storage system, but is not limited thereto.
  • the positive electrode material mixture of this embodiment includes the additive positive electrode active material including the lyrium peroxide (Na 0 ) and the platinum; And the conductive material, wherein the content of the platinum in the total amount of 100 % by weight of the platinum and the conductive material is controlled to be not less than 7 % by weight and not more than 20 % by weight, thereby effectively canceling irregularities in capacity between the electrode and the irreversible capacity, There is a critical significance.
  • FIG. 2 is a graph showing initial charging / discharging characteristics of each of the lithium secondary batteries of Examples 1 and 2 and Comparative Examples 1 and 2.
  • Example 1 (and the conductive material in the total amount 100% by weight content of 10% by weight of 2019/103575 1 » (: 1 ⁇ ⁇ 2018/014724
  • a positive electrode material mixture containing lithium peroxide ( Ni2O ), platinum (E), a conductive material and a binder was prepared, and the compounding ratio was controlled so that the total amount of the conductive material and the conductive material became 10% by weight.
  • Example 1 80: 0.8: 7.2: 12, and the mixture was induced in a mortar and dry mixed to prepare a positive electrode mix of Example 1.
  • An organic solvent () was added to the positive electrode mixture of Example 1 to form a slurry phase.
  • the slurry was applied on an aluminum current collector and vacuum-dried in a vacuum oven at 120 ° C for 12 hours to obtain a positive electrode of Example 2 .
  • Example 2 (and when the content of the conductive material is 100% by weight and the content is 15% by weight) 2019/103575 1 » (: 1 ⁇ ⁇ 2018/014724
  • Lee ryumpeo oxide (Needle 202), the platinum content in the (), the conductive material, and a positive electrode material mixture was prepared containing the binder, the conductive material la and the total amount 100% by weight of the blend ratio was controlled to be 15% by weight.
  • Example 2 80 : 1.2 : 6.8 : 12 , and the mixture was induced in a mortar and dry mixed to prepare a positive electrode mixture of Example 2 .
  • Example 2 Using the cathode mixture of Example 2 instead of the positive electrode material mixture 10 in Example 1, and the rest in the same manner as in Example 1, to thereby prepare a positive electrode and Lyrium secondary battery of the second embodiment. Comparative Example 1 (when not used at all)
  • Example 2 Was used as the cathode active material, and the cathode active material of Comparative Example was prepared in the same manner as in Example 1 , except that the anode active material was not used at all.
  • Comparative Example 2 (and of the conductive material in the total amount of 10 0% by weight, if the O content is 5% by weight)
  • a mixture of lithium peroxide (Ni 2 O ), platinum (C), and a binder was prepared, and the mixing ratio was controlled so that the total amount of the conductive material was 100 wt % , and the content of t was 5 wt % .
  • Example 1 For each cell of Example 1 and Comparative Example 1 , the initial charge-discharge characteristics were evaluated under the following 10 conditions at room temperature. The evaluation results are shown in Fig.
  • Example 1 and Comparative Example 1 in order to confirm the influence of the initial performance of the battery 15 by the additives of the Examples, the cathode active material was not extremely mixed, Was prepared in the same amount as that of the conventional cathode active material to prepare each of the positive electrode mixture of Example 1 and Comparative Example 1, and each positive electrode mixture was applied to manufacture a positive electrode and a lithium secondary battery.
  • the initial charge capacity of the positive electrode 1 can be confirmed that the improved 30 to about 700 mAh / g. From these results, it can be seen that the platinum Pt) is applied to the anode together with the lyrium peroxide Li0 to improve the reaction efficiency of the Reaction Scheme 1, thereby effectively dissipating the irreversible capacity imbalance of the anode, It can be seen that the initial efficiency of the anode can be further increased.
  • the cathode active material was not extremely mixed in order to confirm the effect of the initial performance of the battery by the additive of the Example.
  • the cathode active material may be mixed with the anode additive of one embodiment in an appropriate blending ratio.
  • the platinum (P t) but only the effect of improving the initial charge capacity and initial efficiency of the positive electrode is applied to a positive electrode material mixture, in particular, the platinum and the conductive material in the total amount 100% by weight, the content of the platinum-7 wt. To 20 % by weight or more, more specifically 15 % by weight or more and 8 % by weight or more and 17 % by weight or less, and still more specifically 10 % by weight or more to 15 % by weight or less.
  • Comparative Examples voltage during the initial charging of the first battery for example, 2.5 to 4. 25 V 25 from (v s. Li / Li + )
  • the reaction efficiency is not good and the initial charge capacity of the anode is only about 195 mAh / g .
  • Example 2 Li ryumpeo oxide (Li 202) Platinum (P t) to, but added 10 weight% of P t content of P t and the conductive material in the total amount 100% by weight, in addition to Example 1 and 15% by weight (Example 2) in contrast to the case of Comparative example 1 as a control, the initial charge capacity of the positive electrode 30 of about 699 mA h / g (example 1) and each increased by about 702 mAh / g (example 2) 2019/103575 1 » (: 1 ⁇ ⁇ 2018/014724
  • the positive electrode material mixture in addition to the peroxide (Nishi 02) was added to platinum (e)
  • the effect of improving the initial charge capacity and initial efficiency of the positive electrode is, but the addition of platinum () and the conductive material in a total amount of 100 % by weight bisulfite content of 7 to 10% by weight or more to 20 wt%, more specifically, to be controlled so that more specific or less to 15 wt% or more and 10% by weight or less than 17% by weight at least 8% by weight
  • the positive electrode active material of one embodiment may be mixed with the positive electrode active material in an appropriate blending ratio.

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  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
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  • Battery Electrode And Active Subsutance (AREA)
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Abstract

La présente invention concerne un mélange d'électrode positive, une électrode positive le comprenant et une batterie secondaire au lithium. Plus particulièrement, le mélange d'électrode positive comprend du peroxyde de lithium (Li202) et du platine (Pt), et ainsi un déséquilibre de capacité irréversible entre deux électrodes peut être efficacement annulé, et la capacité de charge de 1er cycle de l'électrode positive peut encore être augmentée.
PCT/KR2018/014724 2017-11-27 2018-11-27 Mélange d'électrode positive, électrode positive le comprenant et batterie secondaire au lithium Ceased WO2019103575A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US16/607,309 US11316149B2 (en) 2017-11-27 2018-11-27 Positive electrode mix, positive electrode including the same, and lithium secondary battery
PL18881949T PL3598535T3 (pl) 2017-11-27 2018-11-27 Mieszanina elektrody dodatniej, zawierająca ją elektroda dodatnia i akumulator litowy
EP18881949.4A EP3598535B1 (fr) 2017-11-27 2018-11-27 Mélange d'électrode positive, électrode positive le comprenant et batterie secondaire au lithium
JP2019554642A JP6827559B2 (ja) 2017-11-27 2018-11-27 正極合剤、これを含む正極、およびリチウム二次電池
CN201880023953.6A CN110506349B (zh) 2017-11-27 2018-11-27 正极混合物、包含其的正极和锂二次电池

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KR10-2017-0159733 2017-11-27
KR20170159733 2017-11-27
KR10-2018-0148220 2018-11-27
KR1020180148220A KR102434256B1 (ko) 2017-11-27 2018-11-27 양극 합제, 이를 포함하는 양극, 및 리튬 이차 전지

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Citations (4)

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Publication number Priority date Publication date Assignee Title
KR101338142B1 (ko) * 2010-04-27 2013-12-06 한양대학교 산학협력단 리튬 공기 전지
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