TR2021018179A2 - USING ARBINOGALACTAN BIOPOLYMER AS MEMBRANE IN LITHIUM ION BATTERIES - Google Patents

Abstract

The invention relates to the use of arabinogalactan biopolymer as a membrane in lithium-ion batteries.

Description

DESCRIPTION ARBINOGALACTAN AS MEMBRANE IN LITHIUM ION BATTERIES USING BIOPOLYMER TECHNICAL FIELD The invention is based on the use of arabinogalactan biopolymer as a membrane in lithium-ion batteries. related to its use. PRIOR ART Li-ion batteries have been on the market nearly twenty years ago. It is considered the powerhouse of the personal digital electronics revolution.

As it may have already been noticed from daily life, the use of mobile electronic devices Li-ion with increased functionality always higher energy and power density requires batteries. Another important expanding market for Li-ion batteries is that only high power, high capacity, high charge rate, long life, but also significantly requiring new generation Li-ion batteries with improved safety performance and low cost. electric and hybrid vehicles. Consumer use and the needs of electric vehicles Li-ion batteries of approximately 100 GW hours are required to meet the Supply shortage in Li-ion battery production since 2024 is expected. Also, to smooth the gap between energy supply and demand Intermittent and fluctuating energy from renewable sources such as the sun and wind Li-ion batteries are also planned to be used for storage and buffering. Example In addition, the extra solar energy produced during the day can be used both in the absence of sunlight. It will provide energy at night and can be stored in Li-ion batteries.

Li-ion batteries are other commercial rechargeable batteries for gravimetric and volumetric energy. It is quite advanced compared to batteries. In addition, lithium metal batteries are more expensive than Li-ion batteries. Despite their high theoretical energy density, their poor rechargeability and they are sensitive to misuse, even as only metal in batteries. known to cause fire and explosion as a result of using one of the disadvantages. Recently, lithium-air and lithium-sulfur batteries have attracted great interest. sees. Promising progress in Li-air and Li-sulfur batteries provided, but reliable performances comparable to Li-ion batteries are not achieved. It may take twenty years to fully develop these technologies to batteries will be charged for at least the next ten years because of the advantages they offer. It is expected to continue to dominate the rechargeable battery market. In addition, Li- Since ion batteries have a flexible design, they are present in the device systems they are used in. in a wide variety of shapes and sizes to fit the space efficiently they can be used. In rechargeable lithium-ion batteries, the cells are primarily responsible for producing and storing energy as in systems It consists of four main components. These are anode, cathode, membrane and electrolyte. can be ordered. The anode material acts as the negative electrode and the cathode acts as the positive electrode.

Positive electrodes are usually made of metal oxides with tunnel or layered structures. (LiMOx) are formed. Negative electrode materials have layered structures. This Thanks to the structures, Li ions are positive and negative during charging and discharging of the cell/battery. It can move reciprocally between its electrodes. This movement is known as the exchange reaction. The active materials in this reaction are the anode and they act as the cathode and host for lithium, while lithium acts as a guest. migrates from one electrode to the other. During this migration, ions leave the pores of the membrane. they move through. After a while, clogging in the membrane pores They form and begin to act as an obstacle to the migration of ions. This is used membranes are cost-effective and environmentally friendly materials they are not. This will eliminate the disadvantages of membranes, battery It is an inexpensive, environmentally friendly and long-lasting different membrane search is born.

MEANING OF SHAPES Figure 1. Chemical Structure of Arabinogalactanin Figure 2. Arabinogalactan membranin membrane membrane METHOD A schematic representation of the preparation with the casting solution Figure 3. Arabinogalactan membranin membrane membrane METHOD B schematic representation of the preparation with the casting solution DETAILED DESCRIPTION OF THE INVENTION Arabinogalactan is found in the leaves, roots and stems of many plants. It is a natural compound. arabinogalactani, first discovered in larch in the 19th century help prevent colds, fight infections, and relieve allergies It has become popular today because of its claims that it can help.

A natural compound found in many plants from arabiangalac and herb like gum arabic It is a key component in gums. Cells for structural support of some bacterial species It has arabinogalatan on its walls. An important commercial source of arabiangalactan It is a North American larch tree. Extracts from this tree are larch It is called arabinogalactan. Various from arabiangalactan, such as high stability has unique properties. It is used as a thickening and stabilizing agent. makes it useful. Arabinogalactan is a polysaccharide, that is, many small It consists of sugar molecule. More specifically, the name arabinogalactan, arabinose and from long chains of galactose sugars. The composition of these sugars, plant may vary depending on the type. For example, from larch arabinogalac, in a ratio of 6:1 Contains galactose and arabinose.

Arabinogalactan is also commonly found in combination with proteins.

In addition, arabinose and galactose in its structure are both equatorial and axial. The anionic properties of OH- ions in the solid state membrane formation the electrolyte to be introduced into the biopolymers that reach the glass transition temperature by adding It provides an advantage to increase absorption performance.

Since there is more than one branched structure in the structure of Arabinogalacta During membrane formation, each branched structure forms a gelatinous structure within itself. forms the structure. Thus, it increases the mechanical strength of the membrane, It also provides the desired flexibility. Obtained from Arabinogalactan polysaccharide ß-(1-3) and ß-(1-6) to each other, which constitute the acid tolerance and structure of the membrane. A suitable solvent system of galactopyranosyl units linked by glycosidic bonds (with suitable cross-linking agents: carboxylic acid, oxidation, etc.) by tying, 0 Applicable in wide temperature ranges, - Being an extremely effective emulsion stabilizer, 0 Due to its high molecular weight, it has a long service life. to be o Molecular structural stiffness, - Heat stability, 0 High discharge capacity, 0 High ionic conductivity, - Shows inert properties due to cross-linking and can be mixed with organic solvents. to be available, o During the preparation of the solid state membrane, suitable vitreous At the transition temperature (ESD-80°C), the long duration of the electrolyte trapped in the membrane provides advantages such as fulfilling its function in the long term.

Arabinogalactanine, which is in the natural polymer class; long chain and branched being a natural component in the structure, adjusting the pore size, different binders Conveniences such as preparation as a membrane in a suitable solvent with offers. In addition, batteries are easily cross-linked and due to their protein structure. that there will be no charge accumulation on the surface during charge-discharge cycles in and it will be long lasting. The invention that is the subject of the patent application (Arabinogalactanin battery to be used as a membrane) ; will contribute to high battery performance, is a suitable candidate for the transition to the use of sustainable materials and energy will be able to improve the circular economy dilemma in landfill.

The invention will eliminate the disadvantages of existing membranes and Membrane was synthesized from arabinogalactan, which is biodegradable in nature. A different point of view is that the obtained membrane is environmentally friendly and long-lasting. is gaining.

Membrane synthesis METHOD A Sample Name Use Reaction Temperature amount Dichloromethane (DCM) and its derivatives 0.1%-100% -25-35°C Dimethylformamide(DMF)and its derivatives 0.1%-100% -25-153°C The percentages of use of chemicals used during membrane preparation and solution preparation conditions Membrane synthesis METHOD B Sample Name Use Reaction Temperature amount Ethyl Alcohol and its derivatives 0.1%-100% -25-35°C The percentages of use of chemicals used during membrane preparation and solution preparation conditions In the above table, the materials used in the preparation of the arabinogalactan membrane. chemical percentages and also reaction ambient conditions are given. Membrane 2 here prepared with different method.

METHOD A: Separate solutions from Arabinogalactan in flake, powder and liquid form has been prepared. Into the prepared solutions at a mixing speed of 0-10000 rpm (each for the form) DCM/DMF given in Table 1: 0.1-100% in certain ratios from the solvent pair is added and the mixture is continued. Subsequently, they have different molecular weights (1000- by slowly adding the solution at different temperatures (25-100°C), in different atmospheric conditions (nitrogen, argon, etc.) and in different The reaction was started at mixing speeds (10-10 000 rpm). It is mixed homogeneously in a separate bowl until it is homogeneous (O-1000O rpm). Ethyl alcohol and the water solution is mixed in a separate bowl until homogeneous (0-10000 rpm). Next The EC/PVP solution prepared in the first step is added to the alcohol-water mixture. in hand The slurry obtained is at different temperatures (25-100°C) and in different atmospheric conditions (nitrogen, argon). etc.) and at different mixing speeds (10-10 000 rpm).

NOTE: Different atmospheres such as Nitrogen, Argon etc. will be reacted at 1-4 ml/min. given to the environment.

Invention, preparation technique emulsion polymerization/interface It is prepared according to the principles of polymerization/phase inversion methods.

Mixtures prepared at the end of the reaction casting method Dr.blade casting It can be taken to a petri dish (glass, metal, etc.) at -18°C at desired thicknesses with the Membrane form is obtained by keeping it at different temperatures (-18 - 70 °C) for different periods (2-72 h). 0.4.6 Glycosilicic bond ß-I,3 Glycosidic bond a-D-Arabinopyranose M HO ß-L-Arabinopyranose War) is prepared separately in shake, powder and liquid form.

Into the prepared solutions at a mixing speed of 0-10000 rpm (each for the form) DCM/DMF given in Table 1: 0.1-100% specific from the solvent pair The mixture is continued by adding in proportions.

Subsequently, PVP with different molecular weights (1 OGG-2.500.000 Da) (m different binder derivatives) solution is slowly added and mixed at different temperatures (25- and at different mixing speeds (10-10 000 mm) the reaction is started. It is mixed as homoi'en in a separate bowl until homogeneous (0-10000 mm).

Ethyl alcohol and water solution are mixed in a separate bowl until homogeneous (0-10000). The ECIP'VP solution prepared in the next step was mixed into the alcohol-water mixture. is added The slurry obtained was used at different temperatures (25-100°C) in different atmospheric conditions. (gzgggrggg !9) and at different mixing speeds (10-10 000 rpm) the reaction is started.

Claims (2)

REQUESTS 1. It is an environmentally friendly membrane for lithium-ion batteries, and its feature is; It is characterized by containing arabinogalactan biopolymer. 2. It is the arabinogalactan biopolymer mentioned in claim 1, its feature is; It is characterized by being inside the button/cylindrical battery cell, which is created to provide ion transitions and to increase the life of the battery with a long-term ion transition cycle.