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Method for preparing multilevel structure copper nitrate anode material

A negative electrode material, copper nitrate technology, applied in the field of preparation of copper nitrate negative electrode material, can solve the problems of unobtainable cost, rising cost, high energy consumption, etc., and achieve the effect of stable structure, low cost and good cycle life

Active Publication Date: 2015-10-21
NINGBO UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The existing commercial negative electrode material preparation method mainly uses carbon sources (such as pitch) to carbonize at a high temperature above 2000 °C for a long time to obtain artificial graphite (mesophase carbon microspheres). Therefore, such a synthesis process has high energy consumption. The defect is that while pursuing cheap raw materials, it leads to an increase in the cost of the synthesis process, so that it is impossible to obtain a negative electrode material with low cost, high capacity and good safety that can meet the current social needs

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  • Method for preparing multilevel structure copper nitrate anode material

Examples

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Comparison scheme
Effect test

Embodiment 1

[0014] Take 100g of copper nitrate powder and dissolve it in 500ml of distilled water. After it is completely dissolved, add 1g of carbon fiber, stir at high speed for 30 minutes, then heat up to 60°C, then add 50ml of ethanol and 5ml of 1mol / L glacial acetic acid, and stir for 3 minutes. Add 1g of carbon black and continue to stir until the solution is completely volatilized; next, put the obtained primary product in an oven at 60°C for 24 hours, take out the product and grind it into powder. The obtained product is the copper nitrate negative electrode material with a multi-level structure. The obtained product is used as the research electrode, and the metal lithium sheet is used as the counter electrode, and a button-type lithium-ion battery is assembled in a glove box filled with argon, and the charge-discharge cycle is carried out in the potential range of 0.0-3.4V at a rate of 0.1C. The initial discharge capacity was 2452mAh / g, the charge capacity was 1698mAh / g, and the ...

Embodiment 2

[0016] Take 200g of copper nitrate powder and dissolve it in 500ml of distilled water. After it is completely dissolved, add 5g of carbon fiber, stir at high speed for 30 minutes, then heat up to 80°C, then add 100ml of ethanol and 5ml of 1mol / L glacial acetic acid, and stir for 3 minutes. Add 2g of carbon black and continue to stir until the solution is completely volatilized; Next, put the obtained primary product in an oven at 60°C for 24 hours, take out the product and grind it into powder. The obtained product is the copper nitrate negative electrode material with a multi-level structure. The obtained product is used as the research electrode, and the metal lithium sheet is used as the counter electrode, and a button-type lithium-ion battery is assembled in a glove box filled with argon, and the charge-discharge cycle is carried out in the potential range of 0.0-3.4V at a rate of 0.1C. The initial discharge capacity was 2389mAh / g, the charge capacity was 1780mAh / g, and the...

Embodiment 3

[0018] Take 150g of copper nitrate powder and dissolve it in 500ml of distilled water. After it is completely dissolved, add 3g of carbon fiber, stir at high speed for 30 minutes, then heat up to 70°C, then add 80ml of ethanol and 5ml of 1mol / L glacial acetic acid, and stir for 3 minutes. Add 1g of carbon black and continue to stir until the solution is completely volatilized; next, put the obtained primary product in an oven at 60°C for 24 hours, take out the product and grind it into powder. The obtained product is the copper nitrate negative electrode material with a multi-level structure. The obtained product was used as the research electrode, and the metal lithium sheet was used as the counter electrode, and a button lithium-ion battery was assembled in a glove box filled with argon, and the charge-discharge cycle was carried out in the potential range of 0.0-3.4 V at a rate of 0.1C. The initial discharge capacity was 2783mAh / g, the charge capacity was 2109mAh / g, and the ...

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Abstract

The invention discloses a method for preparing a multilevel structure copper nitrate anode material. The method comprises the steps of dissolving 100-200 g copper nitrate powder in 500 ml distilled water, adding 1-5 g carbon fiber after complete dissolution, stirring for 30 min at a high speed, then heating to 60-80 DEG C, adding 50-100 ml ethyl alcohol and 5 ml 1 mol / L glacial acetic acid, stirring for 3 min, then adding 1-2 g carbon black, and continuing to stir till complete volatilization; then, placing the obtained head product in an oven to be baked for 24 h at 60 DEG C, taking out the product, and grinding the product into powder, so that the multilevel structure copper nitrate anode material is obtained. The method has the advantage that the obtained copper nitrate anode material is of a stable multilevel composite structure, and the multilevel composite structure enables the copper nitrate anode material to have high capacity and long service life.

Description

technical field [0001] The invention relates to a copper nitrate negative electrode material for a lithium ion battery, in particular to a preparation method for a copper nitrate negative electrode material with a multi-level structure. Background technique [0002] As a high-performance energy storage device, lithium-ion batteries have been widely used in mobile phones, notebook computers, digital cameras, electric vehicles and other fields. Among the various components that make up a lithium-ion battery, the positive and negative electrode materials are the key substances that determine the capacity, service life, production price and other factors of the lithium-ion battery. However, since the commercialization of lithium-ion batteries in the 1990s, positive electrode materials have been continuously introduced, while negative electrode materials have been using graphite materials. Compared with the continuous improvement of the capacity of positive electrode materials, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M10/0525H01M4/36
CPCH01M4/364H01M4/625H01M10/0525Y02E60/10
Inventor 郑席舒杰罗明贺孙怡辰卯金理
Owner NINGBO UNIV
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