WO2016031677A1 - ニッケルリチウム金属複合酸化物粉体及びその製造方法 - Google Patents
ニッケルリチウム金属複合酸化物粉体及びその製造方法 Download PDFInfo
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- WO2016031677A1 WO2016031677A1 PCT/JP2015/073407 JP2015073407W WO2016031677A1 WO 2016031677 A1 WO2016031677 A1 WO 2016031677A1 JP 2015073407 W JP2015073407 W JP 2015073407W WO 2016031677 A1 WO2016031677 A1 WO 2016031677A1
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- nickel
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- 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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
- H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/16—Making metallic powder or suspensions thereof using chemical processes
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G53/00—Compounds of nickel
- C01G53/40—Complex oxides containing nickel and at least one other metal element
- C01G53/42—Complex oxides containing nickel and at least one other metal element containing alkali metals, e.g. LiNiO2
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G53/00—Compounds of nickel
- C01G53/80—Compounds containing nickel, with or without oxygen or hydrogen, and containing one or more other elements
- C01G53/82—Compounds containing nickel, with or without oxygen or hydrogen, and containing two or more other elements
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- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2301/00—Metallic composition of the powder or its coating
- B22F2301/05—Light metals
- B22F2301/054—Alkali metals, i.e. Li, Na, K, Rb, Cs, Fr
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2301/00—Metallic composition of the powder or its coating
- B22F2301/15—Nickel or cobalt
-
- 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
- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
- H01M2004/028—Positive electrodes
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- 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 nickel lithium metal composite oxide powder, a lithium ion battery positive electrode active material including the same, a lithium ion battery positive electrode using the active material, a lithium ion battery using the positive electrode, and the nickel lithium metal composite oxide
- the present invention relates to a powder and a manufacturing method thereof.
- lithium ion battery As mentioned above, one of the common products that support industries such as electronic equipment, electric power securing, and automobiles is a lithium ion battery.
- a common cause of the above problems is that the capacity per volume of the lithium ion battery is insufficient.
- a major factor causing the problem that the capacity per volume of the lithium ion battery is insufficient is that the discharge capacity per unit volume of the positive electrode active material used in the lithium ion secondary battery is small.
- a cobalt-based positive electrode active material typified by lithium cobalt oxide (LCO) has been used.
- LCO lithium cobalt oxide
- a high density exceeding 3.9 g per cubic centimeter can be achieved.
- the discharge capacity of lithium cobalt oxide itself is as low as about 150 mAh / g.
- a nickel-based positive electrode active material represented by LNCO Li, Ni, Co composite oxide
- LNCAO Li, Ni, Co, Al composite oxide
- the discharge capacity per unit weight of LNCAO is larger than that of the cobalt-based positive electrode active material and exceeds 190 mAhg-1.
- the density of these active materials themselves is low and it is difficult to increase the electrode density, the discharge capacity per unit volume cannot be improved.
- Patent Document 1 describes that the fracture strength of the active material is adjusted by controlling the composition and average particle size of the LCO-based positive electrode active material.
- Patent Document 2 the compressive strength of an LNCO-type positive electrode active material obtained by controlling the quantity ratio of Ni atoms and Co atoms of Ni—Co hydroxide, which is a raw material of the positive electrode active material, and powder characteristics is adjusted. It is described.
- Patent Document 3 describes that the pressure density of the LNMCO positive electrode active material is adjusted by using a special spray drying method in the production of the active material.
- these prior arts do not discuss LNCAO type nickel-based positive electrode active materials.
- An object of the present invention is to provide an LNCAO type positive electrode active material for a lithium ion battery excellent in discharge capacity and discharge capacity retention.
- the inventors of the present invention searched for means that can control the fracture strength and compression density of the LNCAO-based positive electrode active material particles within a range suitable for battery discharge capacity and battery discharge capacity maintenance.
- a simple means has been found that is not a special method that has been proposed in the prior art but directly controls the selection of raw materials and the particle size of the active material. That is, in the present invention, the nickel lithium metal composite oxide after firing is washed with water, so that the fracture strength of the secondary particles of the nickel lithium metal composite oxide powder and the compression density of the nickel lithium metal composite oxide powder are determined. It was found that control was possible within a range suitable for performance.
- invention 1 A nickel-lithium metal composite oxide represented by the following general formula (1):
- M is one or more metal elements selected from Co, Mn, Fe, and Cu
- N is one or more metal elements selected from Al, W, Ta, and B
- the fracture strength of the secondary particles is in the range of 80 MPa or less, and 192 MPa.
- the density when compressed by pressure is 3.30 g / cm 3 or more, and the density when compressed by pressure of 240 MPa is 3.46 g / cm 3 or more, Nickel lithium metal composite oxide powder.
- the nickel-lithium metal composite oxide represented by the general formula (1) has a hydrogen ion concentration of supernatant of 11.0 or less in pH when 2 g is dispersed in 100 g of water.
- invention 6 A positive electrode active material for a lithium ion battery comprising the nickel lithium metal composite oxide powder according to any one of Inventions 1 to 5.
- invention 7 A positive electrode for a lithium ion battery, characterized in that the positive electrode active material for a lithium ion battery according to Invention 6 is used.
- M is one or more metal elements selected from Co, Mn, Fe, and Cu
- N is one or more metal elements selected from Al, W, Ta, and B
- the fracture strength of the secondary particles is in the range of 80 MPa or less, and 192 MPa.
- Nickel-lithium metal composite oxide powder having a density of 3.30 g / cm 3 or more when compressed by pressure and a density of 3.46 g / cm 3 or more when compressed by a pressure of 240 MPa
- a method for producing a nickel lithium metal composite oxide powder comprising a water washing step after a firing step for producing a nickel lithium metal composite oxide powder precursor.
- invention 14 The invention according to any one of Inventions 9 to 13, wherein in the water washing step, the nickel lithium metal composite oxide is washed with water having a weight of 10 to 300% based on the weight of the nickel lithium metal composite oxide.
- invention 15 The invention according to any one of Inventions 1 to 14, characterized in that, in the water washing step, the nickel lithium metal composite oxide is washed with 50 to 100% by weight of water with respect to the weight of the nickel lithium metal composite oxide.
- invention 16 The method for producing a nickel-lithium metal composite oxide powder according to any one of Inventions 9 to 15, further comprising a dehydration step after the water washing step.
- invention 19 The production of the nickel-lithium metal composite oxide powder according to any one of Inventions 9 to 18, characterized by having a dehydration step after the water washing step, and further having a firing step after the dehydration step. Method.
- a firing step for producing a nickel lithium metal composite oxide powder precursor is performed after a powder mixing step through a raw material dissolution step, a precipitation step, a filtration / washing step, and a drying step.
- the nickel lithium metal composite oxide powder of the present invention has a high discharge capacity per volume and excellent discharge capacity retention.
- the nickel lithium metal composite oxide constituting the nickel lithium metal composite oxide powder of the present invention is a compound represented by the following general formula (1).
- the nickel lithium metal composite oxide constituting the nickel lithium metal composite oxide powder of the present invention is preferably represented by the following general formula (2), wherein M is Co and N is Al in the general formula (1). It is a compound represented.
- the nickel lithium metal composite oxide powder of the present invention can be produced by the following method.
- a nickel sulfate aqueous solution, a cobalt sulfate aqueous solution, sodium hydroxide as a precipitating agent and ammonia water are mixed in a precipitation tank.
- a coprecipitate of nickel hydroxide and cobalt hydroxide is formed.
- the drying method may be any of hot air drying under atmospheric pressure, infrared drying, vacuum drying, and the like. It can dry in a short time by performing vacuum drying. Dry until the water content in the precursor is about 1% by weight.
- the nickel lithium metal composite oxide after firing is washed with water.
- the nickel-lithium metal composite oxide after firing is washed with water in an amount of 10 to 300% by weight, preferably 20 to 300% by weight, more preferably 50 to 100% by weight, based on its weight. If the amount of water used is within this range, the effect of washing is sufficient, the desired particle breaking strength can be obtained, and the battery performance is good.
- the nickel lithium metal composite oxide after washing with water contains a large amount of water.
- the moisture of the nickel lithium metal composite oxide is removed.
- Dehydration is performed by filtration.
- the dehydration is performed by filtration followed by vacuum drying.
- the water content of the nickel-lithium metal composite oxide after drying is only required to be suitable for the efficiency of the next firing step, and is usually 1.0% by weight or less, preferably 0.5% by weight or less, more preferably Is 0.1% by weight or less. If the moisture value after roughing is within this range, the battery performance is good, and it is preferable because there is no waste in production efficiency in the drying process.
- the nickel lithium metal composite oxide is fired.
- the firing temperature is 300 ° C to 800 ° C. If the firing temperature at this time is in this range, the removal of moisture is sufficient, the crystal structure of the active material is not broken, and the battery performance is good.
- the nickel lithium metal composite oxide powder of the present invention is completed.
- a nickel-lithium metal composite oxide powder in which the fracture strength and compression density of the secondary particles are controlled is obtained by the production method having the water washing step described above.
- the active material can be disposed on the electrode at a high density, and the battery performance is improved.
- the excellent physical properties of the nickel lithium metal composite oxide powder of the present invention are considered to be due to the provision of the above-mentioned (7. water washing) step in the production method.
- the discharge characteristics of the nickel-lithium metal composite oxide powder of the present invention are not deteriorated as compared with those in which the water washing is not performed. That is, it can be estimated that the above-described water washing does not cause an event that deteriorates the discharge characteristics such as lithium ion desorption from the crystal layer.
- the particle size distribution of the nickel-lithium metal composite oxide powder of the present invention does not change significantly compared to the case where the water washing is not performed. That is, it can be presumed that the above washing does not cause undesirable events such as aggregation or particle destruction of the nickel lithium metal composite oxide powder.
- the fracture strength and compression density of the positive electrode active material were successfully controlled without deteriorating the discharge characteristics and particle characteristics. It has been surprising that such a result has been obtained in the present invention even though various negative effects have been feared by the washing of the lithium ion battery positive electrode active material.
- components that are undesirable for battery performance contained in the nickel lithium metal composite oxide powder are further reduced.
- undesirable components include alkaline Li compounds such as LiOH that cause gelation of the positive electrode slurry.
- the amount of LiOH contained in the nickel lithium metal composite oxide powder of the present invention is reduced to less than 0.1% by weight as a result of measurement by titration.
- the pH of the supernatant obtained by dispersing 2 g of the nickel lithium metal composite oxide powder of the present invention in 100 g of water is reduced to less than 11.0.
- the nickel lithium metal composite oxide powder of the present invention can be used as a positive electrode active material for lithium ion batteries.
- the positive electrode active material of the lithium ion battery may be composed only of the nickel lithium metal composite oxide powder of the present invention, or the amount of the strength of the nickel lithium metal composite oxide powder of the present invention.
- Other nickel lithium metal composite oxide powders may be mixed.
- a mixture of 50 parts by weight of the nickel lithium metal composite oxide of the present invention and 50 parts by weight of a positive electrode active material for lithium ion secondary batteries other than the present invention can be used as the positive electrode active material.
- a positive electrode active material containing the above-described nickel lithium metal composite oxide of the present invention, a conductive additive, a binder, and an organic solvent for dispersion are added to prepare a positive electrode mixture slurry. Apply to electrode.
- Example 1 A sodium hydroxide aqueous solution was added to an aqueous solution in which nickel sulfate and cobalt sulfate were dissolved, and the resulting precipitate was filtered, washed and dried. A nickel hydroxide-cobalt hydroxide coprecipitate was obtained. The obtained nickel hydroxide-cobalt hydroxide coprecipitate was mixed with lithium hydroxide and aluminum hydroxide in powder form to obtain a calcined raw material. The fired raw material was fired at 780 ° C. in an oxygen stream. The fired product was conveyed to the water washing step.
- nickel lithium metal composite oxide powder was produced under the same conditions as in Example 1, except that 75 g (50% by weight of the calcined product) of water was added to 150 g of the calcined product, stirred and filtered.
- nickel lithium metal composite oxide powder was produced under the same conditions as in Example 1 except that 50 g (33% by weight of the calcined product) of water was added to 150 g of the calcined product, stirred and filtered.
- a nickel lithium metal composite oxide powder was produced under the same conditions as in Example 1 except that 30 g (20% by weight of the calcined product) of water was added to 150 g of the calcined product, stirred and filtered in the water washing step.
- Example 5 In the water washing step, nickel lithium metal composite oxide powder was produced under the same conditions as in Example 1 except that 200 g (133% by weight of the calcined product) of water was added to 150 g of the calcined product, stirred and filtered.
- Example 6 A nickel lithium metal composite oxide powder was produced under the same conditions as in Example 1 except that 250 g (167 wt% of the calcined product) of water was added to 150 g of the calcined product, stirred and filtered in the water washing step.
- Example 1 The nickel-lithium metal composite oxide powder after firing was used as a comparative product without performing the water washing step of Example 1.
- Example 2 A nickel lithium metal composite oxide powder for comparison was prepared under the same conditions as in Example 1, except that 7.5 g (5% by weight of the fired product) of water was added to 150 g of the fired product, stirred and filtered. Manufactured.
- Example 7 Nickel lithium metal composite oxide powder was produced on a larger scale. In the water washing step, 2000 g (100% by weight of the calcined product) of water was added to 2000 g of the calcined product, and the mixture was stirred and filtered. The separated cake was baked at 500 ° C. for 5 hours in an oxygen stream using a muffle furnace without vacuum drying. Other conditions were the same as in Example 1. Thus, a nickel lithium metal composite oxide powder was obtained.
- Example 8 A nickel lithium metal composite oxide powder was produced under the same conditions as in Example 7 except that firing was performed at 500 ° C. in an oxygen stream using a large electric furnace.
- Example 9 A nickel-lithium metal composite oxide powder was produced under the same conditions as in Example 7 except that it was fired at 500 ° C. in an oxygen stream using a production electric furnace.
- Comparative Example 3 A positive electrode active material (trade name: NCA1301-1ZS) for lithium ion batteries manufactured by ShenZhen TianJiao Technology was evaluated as a comparative product.
- Table 2 shows the analysis results of the nickel lithium metal composite oxide powders obtained in the above Examples and Comparative Examples, including the pH value.
- Nickel lithium metal composite oxide powder and positive electrode active material for lithium ion secondary battery using the same satisfy the high capacity of secondary batteries such as small electronic devices, which is a recent requirement, and large size for electric vehicles Satisfying the high capacity and miniaturization required as a power source used for secondary batteries and stationary storage batteries, it is very significant industrially.
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Abstract
Description
(発明1)以下の一般式 (1)で表されるニッケルリチウム金属複合酸化物からなり、
ニッケルリチウム金属複合酸化物粉体。
(発明4)一般式(1)におけるNがAlであることを特徴とする、発明1~3のいずれかに記載のニッケルリチウム金属複合酸化物粉体。
(発明10)得られたニッケルリチウム金属複合酸化物粉体2gを100gの水に分散させた際の上澄の水素イオン濃度がpHで11.0以下であり、そのLiOHの含有量が0.1重量%以下であることを特徴とする、発明9に記載のニッケルリチウム金属複合酸化物粉体の製造方法。
本発明のニッケルリチウム金属複合酸化物粉体を構成するニッケルリチウム金属複合酸化物は、好ましくは、上記一般式(1)においてMがCo、NがAlである、以下の一般式(2)で表される化合物である。
本発明のニッケルリチウム金属複合酸化物粉体は、以下の方法により製造することができる。
硫酸ニッケル及び硫酸コバルトを溶解させた水溶液に水酸化ナトリウム水溶液を加え、生じた沈殿を濾過、洗浄、乾燥した。水酸化ニッケル-水酸化コバルト共沈物を得た。得られた水酸化ニッケル-水酸化コバルト共沈物に水酸化リチウムと水酸化アルミニウムを粉体で混合し焼成原料を得た。この焼成原料を酸素気流中、780℃で焼成した。焼成物を水洗工程に搬送した。
[実施例2]
水洗工程で、焼成物150gに75g(焼成物の50重量%)の水を加え攪拌、濾過した点以外は実施例1と同様の条件でニッケルリチウム金属複合酸化物粉体を製造した。
[実施例3]
水洗工程で、焼成物150gに50g(焼成物の33重量%)の水を加え攪拌、濾過した点以外は実施例1と同様の条件でニッケルリチウム金属複合酸化物粉体を製造した。
[実施例4]
水洗工程で、焼成物150gに30g(焼成物の20重量%)の水を加え攪拌、濾過した点以外は実施例1と同様の条件でニッケルリチウム金属複合酸化物粉体を製造した。
[実施例5]
水洗工程で、焼成物150gに200g(焼成物の133重量%)の水を加え攪拌、濾過した点以外は実施例1と同様の条件でニッケルリチウム金属複合酸化物粉体を製造した。
[実施例6]
水洗工程で、焼成物150gに250g(焼成物の167重量%)の水を加え攪拌、濾過した点以外は実施例1と同様の条件でニッケルリチウム金属複合酸化物粉体を製造した。
[比較例1]
実施例1の水洗工程を行わず、焼成後のニッケルリチウム金属複合酸化物粉体を比較品とした。
[比較例2]
水洗工程で、焼成物150gに7.5g(焼成物の5重量%)の水を加え攪拌、濾過した点以外は実施例1と同様の条件で比較用のニッケルリチウム金属複合酸化物粉体を製造した。
[実施例7]
より大きいスケールでニッケルリチウム金属複合酸化物粉体を製造した。水洗工程では、焼成物2000gに2000g(焼成物の100重量%)の水を加え攪拌、濾過した。分離されたケーキを真空乾燥を行わずそのまま、マッフル炉を用いて酸素気流中500℃で5時間焼成した。そのほかの条件は実施例1と同じとした。こうしてニッケルリチウム金属複合酸化物粉体を得た。
[実施例8]
大型電気炉を用いて酸素気流中500℃で焼成した点以外は実施例7と同じ条件で、ニッケルリチウム金属複合酸化物粉体を製造した。
[実施例9]
生産用実機電気炉を用いて酸素気流中500℃で焼成した点以外は実施例7と同じ条件で、ニッケルリチウム金属複合酸化物粉体を製造した。
[比較例3]
ShenZhen TianJiao Technology 社製リチウムイオン電池用正極活物質(商品名 NCA1301-1ZS)を比較品として評価した。
Claims (20)
- 一般式(1)で表されるニッケルリチウム金属複合酸化物が、その2gを100gの水に分散させた際の上澄の水素イオン濃度がpHで11.0以下であり、そのLiOHの含有量が0.1重量%以下であることを特徴とする、請求項1に記載のニッケルリチウム金属複合酸化物粉体。
- 一般式(1)におけるMがCoであることを特徴とする、請求項1または2に記載のニッケルリチウム金属複合酸化物粉体。
- 一般式(1)におけるNがAlであることを特徴とする、請求項1~3のいずれか1項に記載のニッケルリチウム金属複合酸化物粉体。
- 一般式(1)における一般式(1)におけるMがCoであり、かつ、NがAlであることを特徴とする、請求項1~4のいずれか1項に記載のニッケルリチウム金属複合酸化物粉体。
- 請求項1~5のいずれか1項に記載のニッケルリチウム金属複合酸化物粉体を含むことを特徴とする、リチウムイオン電池用正極活物質。
- 請求項6に記載のリチウムイオン電池用正極活物質を用いることを特徴とする、リチウムイオン電池用正極。
- 請求項7に記載のリチウムイオン電池用正極を備えることを特徴とする、リチリウムイオン電池。
- 以下の一般式(1)で表されるニッケルリチウム金属複合酸化物からなり、
(ただし式(1)中、Mは、Co,Mn,Fe、Cuから選ばれる1つ以上の金属元素であり、NはAl、W、Ta、Bから選ばれる1つ以上の金属元素であり、0.90<x<1.10、0.01<y<0.15、0.005<z<0.10である。)
二次粒子の破壊強度が80MPa以下の範囲であり、
192MPaの圧力で圧縮した際の密度が3.30g/cm3以上であり、
240MPaの圧力で圧縮した際の密度が3.46g/cm3以上であることを特徴とする、ニッケルリチウム金属複合酸化物粉体の製造方法であって、
ニッケルリチウム金属複合酸化物粉体前駆体を製造するための焼成工程の後に、水洗工程を有することを特徴とする、
ニッケルリチウム金属複合酸化物粉体の製造方法。 - 得られたニッケルリチウム金属複合酸化物粉体2gを100gの水に分散させた際の上澄の水素イオン濃度がpHで11.0以下であり、そのLiOHの含有量が0.1重量%以下であることを特徴とする、請求項9に記載のニッケルリチウム金属複合酸化物粉体の製造方法。
- 一般式(1)におけるMがCoであることを特徴とする、請求項9または10に記載のニッケルリチウム金属複合酸化物粉体の製造方法。
- 一般式(1)におけるNがAlであることを特徴とする、請求項9~11のいずれか1項に記載のニッケルリチウム金属複合酸化物粉体の製造方法。
- 一般式(1)における一般式(1)におけるMがCoであり、かつ、NがAlであることを特徴とする、請求項9~12のいずれか1項に記載のニッケルリチウム金属複合酸化物粉体の製造方法。
- 水洗工程において、ニッケルリチウム金属複合酸化物の重量に対して10~300%の重量の水でニッケルリチウム金属複合酸化物を洗浄することを特徴とする、請求項9~13のいずれか1項に記載のニッケルリチウム金属複合酸化物粉体の製造方法。
- 水洗工程において、ニッケルリチウム金属複合酸化物の重量に対して50~100%の重量の水でニッケルリチウム金属複合酸化物を洗浄することを特徴とする、請求項9~14のいずれか1項に記載のニッケルリチウム金属複合酸化物粉体の製造方法。
- 水洗工程の後に、さらに、脱水工程を有することを特徴とする、請求項9~15のいずれか1項に記載のニッケルリチウム金属複合酸化物粉体の製造方法。
- 脱水工程において濾過による脱水を行うことを特徴とする、請求項16に記載のニッケルリチウム金属複合酸化物粉体の製造方法。
- 脱水工程において濾過による脱水と真空乾燥を行うことを特徴とする、請求項16に記載のニッケルリチウム金属複合酸化物粉体の製造方法。
- 水洗工程の後に脱水工程を有し、該脱水工程の後にさらに焼成工程を有することを特徴とする、請求項9~18のいずれか1項に記載のニッケルリチウム金属複合酸化物粉体の製造方法。
- ニッケルリチウム金属複合酸化物粉体前駆体を製造するための焼成工程を、原料の溶解工程、沈殿工程、ろ過・洗浄工程、乾燥工程を経た粉体混合工程の後に行うことを特徴とする、請求項9~19のいずれか1項に記載のニッケルリチウム金属複合酸化物の製造方法。
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| US10468680B2 (en) | 2019-11-05 |
| TW201609559A (zh) | 2016-03-16 |
| CN106575763A (zh) | 2017-04-19 |
| JPWO2016031677A1 (ja) | 2017-06-15 |
| US20170256794A1 (en) | 2017-09-07 |
| CN106575763B (zh) | 2019-10-01 |
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