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Lithium ion battery anode material and preparation method thereof

A technology for lithium ion batteries and negative electrode materials, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problem that the specific capacity of negative electrode materials cannot meet the needs, and achieve improved cycle stability, excellent discharge specific capacity, and volume expansion mitigation. Effect

Inactive Publication Date: 2019-03-01
INT ACAD OF OPTOELECTRONICS AT ZHAOQING SOUTH CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The object of the present invention is to provide a lithium ion battery negative electrode material and a preparation method thereof in view of the problem that the specific capacity of the current lithium battery negative electrode material cannot meet the needs, and nickel sulfide, indium sulfide and graphene are combined as the negative electrode active material to obtain Negative electrode materials with high charge-discharge specific capacity and good cycle performance

Method used

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  • Lithium ion battery anode material and preparation method thereof
  • Lithium ion battery anode material and preparation method thereof
  • Lithium ion battery anode material and preparation method thereof

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Effect test

Embodiment 1

[0023] In the negative electrode material of the lithium ion battery, the negative electrode active material is a composite of nickel sulfide, indium sulfide and graphene. The material is a self-supporting structure.

[0024] The preparation method of described lithium-ion battery negative electrode material, comprises the following steps:

[0025] (1) Preparation of foamed nickel-graphene composite material: Cut the commercially available nickel foam into strips of 2 cm × 4 cm, immerse in 80 mL of graphene solution with a concentration of 2 mg / mL for 40 minutes, and then let it stand for 15 minutes before taking it out. spare;

[0026] (2) Preparation of indium sulfide-nickel sulfide composite graphene material: First, put 1.5g of indium nitrate nonahydrate and 0.8g of thioacetamide in 25mL of deionized water, and stir evenly to obtain a mixed solution; then mix the obtained mixed solution with the step ( The foamed nickel-graphene composite material prepared in 1) was plac...

Embodiment 2

[0031] In the negative electrode material of the lithium ion battery, the negative electrode active material is a composite of nickel sulfide, indium sulfide and graphene. The material is a self-supporting structure.

[0032] The preparation method of described lithium-ion battery negative electrode material, comprises the following steps:

[0033] (1) Preparation of foamed nickel-graphene composite material: Cut the foamed nickel into strips of 2cm×4cm, immerse in 50mL graphene solution with a concentration of 1mg / mL and sonicate for 30 minutes, then let it stand for 10 minutes, take it out, and set aside;

[0034] (2) Preparation of indium sulfide-nickel sulfide composite graphene material: first place 1g of indium nitrate nonahydrate and 0.5g of thioacetamide in 20mL of deionized water, and stir to obtain a mixed solution; then mix the obtained mixed solution with step (1 The foamed nickel-graphene composite material prepared in ) was placed in the lining of a 50mL polytet...

Embodiment 3

[0036] In the negative electrode material of the lithium ion battery, the negative electrode active material is a composite of nickel sulfide, indium sulfide and graphene. The material is a self-supporting structure.

[0037] The preparation method of described lithium-ion battery negative electrode material, comprises the following steps:

[0038] (1) Preparation of foamed nickel-graphene composite material: Cut the foamed nickel into strips of 2cm×4cm, immerse in 100mL of graphene solution with a concentration of 2mg / mL and sonicate for 60 minutes, then let it stand for 20 minutes, take it out, and set aside;

[0039](2) Preparation of indium sulfide-nickel sulfide composite graphene material: first, put 2g of indium nitrate nonahydrate and 1g of thioacetamide in 30mL of deionized water, and stir evenly to obtain a mixed solution; then mix the obtained mixed solution with step (1) The foamed nickel-graphene composite material prepared in was placed in the lining of a 50mL p...

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Abstract

The invention belongs to the technical field of lithium ion batteries, and particularly relates to a lithium ion battery anode material and a preparation method thereof. Nickel sulfide, indium sulfideand graphene are compounded as a negative active substance, and an anode material with high charge-discharge specific capacity and good cycling performance is obtained.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a lithium ion battery negative electrode material and a preparation method thereof. Background technique [0002] Energy sources such as petroleum and coal are becoming increasingly depleted, and energy issues have clearly affected the rapid, stable and sustainable development of the economy. On the one hand, people need to explore new energy sources, and on the other hand, they need to use energy more rationally. As an important storage method of energy - battery is one of the important media for rational and effective use of energy. Since the 21st century, with the rapid development of the IT industry, mobile phones, notebook computers, MP3 and digital cameras are inseparable from secondary batteries. Batteries have become an indispensable and important product in people's daily life. In addition, the development of portable electronic devices, hybri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/583H01M4/62H01M4/58H01M10/0525C01B32/182
CPCC01B32/182H01M4/362H01M4/5815H01M4/583H01M4/625H01M10/0525Y02E60/10
Inventor 张永光王加义
Owner INT ACAD OF OPTOELECTRONICS AT ZHAOQING SOUTH CHINA NORMAL UNIV
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