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Lithium battery anode material and preparation method thereof

A positive electrode material, lithium battery technology, applied in the direction of battery electrodes, secondary batteries, chemical instruments and methods, etc., can solve the problems of high surface resistance, poor peel strength, poor contact, etc., and achieve excellent cycle performance, good safety performance, Excellent effect of high temperature cycle

Inactive Publication Date: 2017-05-10
SHENZHEN SINUO INDAL DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still many problems, such as poor contact between the electrode material particles and the current collector, large surface resistance, poor peel strength, and cycle expansion during charge and discharge. These problems seriously affect the cycle life of lithium-ion batteries. stability

Method used

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  • Lithium battery anode material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0016] A lithium battery cathode material, the main raw materials in parts by weight are: 8 parts of polypyrrole, 20 parts of lithium iron phosphate, 4 parts of polyaniline, 1 part of polyvinyl imidazole, 1 part of sodium vinyl sulfonate, N,N'- 1 part of bis(4-chlorophenyl)-N,N'-diphenyl-1,4-phenylenediamine.

[0017] A preparation method of a lithium battery cathode material, characterized in that the specific steps are:

[0018] (1) First, soak lithium iron phosphate in 0.2mol / L sodium hydroxide solution, soak for 2 hours, grind and mix with polypyrrole and polyaniline in a dust-free space, transfer to a high-temperature furnace after mixing, and heat at 600 Calcined at a constant temperature for 6 hours at ℃, and cooled to room temperature with the furnace at a speed of 2℃ to obtain a semi-finished product;

[0019] (2) Finally, mix the semi-finished product with polyvinyl imidazole, sodium vinylsulfonate, N,N'-bis(4-chlorophenyl)-N,N'-diphenyl-1,4-phenylenediamine And pl...

Embodiment 2

[0022] A lithium battery cathode material, the main raw materials in parts by weight are: 9 parts of polypyrrole, 24 parts of lithium iron phosphate, 5 parts of polyaniline, 1 part of polyvinyl imidazole, 1 part of sodium vinyl sulfonate, N,N'- 1 part of bis(4-chlorophenyl)-N,N'-diphenyl-1,4-phenylenediamine.

[0023] A preparation method of a lithium battery cathode material, characterized in that the specific steps are:

[0024] (1) First, soak lithium iron phosphate in 0.3mol / L sodium hydroxide solution, soak for 2 hours, grind and mix with polypyrrole and polyaniline in a dust-free space, and transfer to a high-temperature furnace after mixing. Calcined at a constant temperature for 6 hours at ℃, and cooled to room temperature with the furnace at a speed of 2℃ to obtain a semi-finished product;

[0025] (2) Finally, mix the semi-finished product with polyvinyl imidazole, sodium vinylsulfonate, N,N'-bis(4-chlorophenyl)-N,N'-diphenyl-1,4-phenylenediamine And placed in a ba...

Embodiment 3

[0028] A lithium battery cathode material, the main raw materials in parts by weight are: 10 parts of polypyrrole, 26 parts of lithium iron phosphate, 7 parts of polyaniline, 2 parts of polyvinyl imidazole, 2 parts of sodium vinyl sulfonate, N,N'- 2 parts of bis(4-chlorophenyl)-N,N'-diphenyl-1,4-phenylenediamine.

[0029] A preparation method of a lithium battery cathode material, characterized in that the specific steps are:

[0030] (1) First, soak lithium iron phosphate in 0.4mol / L sodium hydroxide solution, soak for 3 hours, grind and mix with polypyrrole and polyaniline in a dust-free space, transfer to a high-temperature furnace after mixing, and heat at 625 Calcined at a constant temperature for 7 hours at ℃, and cooled to room temperature with the furnace at a speed of 4℃ to obtain a semi-finished product;

[0031] (2) Finally, mix the semi-finished product with polyvinyl imidazole, sodium vinylsulfonate, N,N'-bis(4-chlorophenyl)-N,N'-diphenyl-1,4-phenylenediamine An...

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Abstract

The invention discloses a lithium battery anode material and a preparation method thereof. The lithium battery anode material is prepared from the following main raw materials in parts by weight: 8-12 parts of polypyrrole, 20-30 parts of lithium iron phosphate, 4-10 parts of polyaniline, 1-3 parts of polyvinyl imidazol, 1-3 parts of sodium ethylenesulphonate, and 1-3 parts of N,N'-Bis(4-chlorophenyl)-N,N'-diphenyl-1,4-phenylenediamine. A prepared lithium battery achieves excellent cycle performance, and the capacity remains at above 95% after 1C charge and discharge for 2,000 cycles at a room temperature; a 6C discharge capacity is above 98% of a 1C discharge capacity; the battery doesn't catch fire or explode in a 3C / 10V overcharge test; the high-temperature cycle performance is excellent, and the capacity remains at above 93% after 1C charge and discharge for 1,000 cycles at a temperature of 60 DEG C; and good safety performance is achieved, and the battery doesn't explode or catch fire in a puncture test, an extrusion test, an overcharge test, an over-discharge test and other tests.

Description

technical field [0001] The invention relates to the field of battery technology, in particular to a lithium battery cathode material and a preparation method thereof. Background technique [0002] Commercial lithium-ion battery cathode materials are mainly lithium cobalt oxide and lithium manganese oxide. However, there are still many problems, such as poor contact between the electrode material particles and the current collector, large surface resistance, poor peel strength, and cycle expansion during charge and discharge. These problems seriously affect the cycle life of lithium-ion batteries. stability. Contents of the invention [0003] The object of the present invention is to provide a lithium battery positive electrode material and a preparation method thereof, so as to solve the problems raised in the above-mentioned background technology. [0004] To achieve the above object, the present invention provides the following technical solutions: [0005] A lithium ...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/60H01M4/58H01M10/0525C01B25/37C01B25/45C01B25/26
CPCC01B25/26C01B25/375C01B25/45H01M4/362H01M4/58H01M4/60H01M4/602H01M10/0525Y02E60/10
Inventor 鲍海友杨建锋田东李丹枫胡文良汪烨森
Owner SHENZHEN SINUO INDAL DEV
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