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Anode material, preparation method of anode material, and lithium ion battery comprising anode material

A technology for lithium-ion batteries and positive electrode materials, applied in battery electrodes, secondary batteries, circuits, etc., can solve problems such as poor high-temperature performance, unsatisfactory lithium-ion batteries, and unsatisfactory high- and low-temperature cycle performance.

Active Publication Date: 2017-11-21
双一力(宁波)电池有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a positive electrode material and its preparation method, and a lithium ion battery containing the positive electrode material, so as to solve the problem of insufficient high and low temperature cycle performance of the lithium ion battery made of the existing positive electrode material and electrolyte. Ideal, the high temperature effect is relatively poor, and it can no longer meet the needs of lithium-ion batteries and other issues

Method used

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  • Anode material, preparation method of anode material, and lithium ion battery comprising anode material
  • Anode material, preparation method of anode material, and lithium ion battery comprising anode material

Examples

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preparation example Construction

[0032] The preparation method of the positive electrode material comprises the following steps:

[0033] S1: Stir the graphene for 20-45min at a magnetic field strength of 4500-6000GS, an ultrasonic power of 200-550W, a temperature of 42-55°C, and a rotation speed of 200-300r / min to obtain graphene energy powder;

[0034] S2: Add sodium cetylbenzenesulfonate to the graphene energy powder that step S1 makes, the mass ratio of described graphene energy powder and sodium cetylbenzenesulfonate is 3-8:1, at temperature Activated at 50-72°C for 1.2-2.5 hours at a rotation speed of 100-150r / min to obtain activated graphene;

[0035] S3: 0.4-0.8 parts of activated graphene prepared in step S2, 0.6-1.3 parts of Ketjen black, 2-4 parts of ethylene-vinyl acetate copolymer, 0.5-1 part of ethylene bisstearamide, 210- Add 300 parts into a high-shear dispersing emulsifier for emulsification and dispersion for 2-3 hours to prepare mixture A;

[0036] S4: Add 85-92 parts of powdered nickel c...

Embodiment 1

[0046] A positive electrode material, in parts by weight, comprising the following raw materials: 90 parts of nickel-cobalt lithium manganese oxide, 1.6 parts of boron fiber, 2.5 parts of silicon nitride, 0.6 part of activated graphene, 1 part of Ketjen black, ethylene-vinyl acetate 3 parts of copolymer, 0.8 parts of ethylene bis stearamide, 1.5 parts of chlorinated polyethylene, 0.5 parts of fatty acid stabilizer.

[0047] The preparation method of the positive electrode material comprises the following steps:

[0048] S1: Stir the graphene for 32 minutes at a magnetic field strength of 5500GS, an ultrasonic power of 40W, a temperature of 50°C, and a rotation speed of 250r / min to obtain graphene energy powder;

[0049] S2: Add sodium hexadecylbenzene sulfonate to the graphene energy powder that step S1 makes, the mass ratio of described graphene energy powder and sodium hexadecylbenzene sulfonate is 6:1, at a temperature of 65 ℃, activated at 130r / min for 2h to produce activ...

Embodiment 2

[0061] A positive electrode material, in parts by weight, comprising the following raw materials: 86 parts of nickel-cobalt lithium manganese oxide, 1 part of boron fiber, 2 parts of silicon nitride, 0.4 part of activated graphene, 0.6 part of Ketjen black, ethylene-vinyl acetate 2 parts of copolymer, 0.5 parts of ethylene bis stearamide, 1.2 parts of chlorinated polyethylene, 0.4 parts of fatty acid stabilizer.

[0062] The preparation method of the positive electrode material comprises the following steps:

[0063] S1: Stir the graphene for 45 minutes at a magnetic field strength of 4500GS, an ultrasonic power of 200W, a temperature of 42°C, and a rotation speed of 200r / min to obtain graphene energy powder;

[0064] S2: Add sodium hexadecylbenzene sulfonate to the graphene energy powder that step S1 makes, the mass ratio of described graphene energy powder and sodium hexadecylbenzene sulfonate is 3:1, at a temperature of 50 ℃, activating at 100r / min for 2.5h to produce acti...

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Abstract

The invention discloses an anode material, a preparation method of the anode material, and a lithium ion battery comprising the anode material. The anode material comprises the following raw materials in parts by weight: 85-92 parts of nickel cobalt lithium manganate, 1-2 parts of boron fiber, 2-3 parts of silicon nitride, 0.4-0.8 parts of activated graphene, 0.6-1.3 parts of ketjen black, 2-4 parts of ethylene-vinyl acetate copolymer, 0.5-1 part of ethylene distearamide, 1.2-1.8 parts of chlorinated polyethylene and 0.4-0.6 parts of fatty acid stabilizer. The preparation method of the anode material comprises the steps of activated graphene preparation, emulsification, dispersion and viscosity adjustment. The high- and low-temperature performance and the cycle performance of the lithium ion battery prepared by the anode material are excellent; and the lithium ion battery is worthy of popularization and application.

Description

【Technical field】 [0001] The invention belongs to the technical field of batteries, and in particular relates to a positive electrode material, a preparation method thereof, and a lithium ion battery containing the positive electrode material. 【Background technique】 [0002] In recent years, with the rapid development of the lithium battery industry, lithium-ion batteries have gradually entered the application fields of electric vehicles and large mobile power supplies, but currently lead-acid batteries still occupy a dominant position. Lithium-ion battery cathode materials are usually lithium cobaltate, lithium manganate, lithium nickelate and various transition metal oxides doped with other elements, but there are many problems, which can no longer meet the needs of the development of electric vehicles and large mobile power supplies. [0003] Lithium-ion battery electrolyte occupies a very important position in lithium-ion batteries, which directly affects the electrical ...

Claims

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Application Information

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IPC IPC(8): H01M4/62H01M10/0525H01M10/0567
CPCH01M4/62H01M4/625H01M4/628H01M10/0525H01M10/0567Y02E60/10
Inventor 吴苗
Owner 双一力(宁波)电池有限公司
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