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A kind of preparation method of negative electrode material of lithium ion battery

A lithium-ion battery and negative electrode material technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of electrode material crushing, poor cycle stability, etc., and achieve the effect of enhanced conductivity, enhanced conductivity, and simple experimental schemes

Active Publication Date: 2021-04-27
SYNERGY INNOVATION INST OF GDUT HEYUAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention overcomes the disadvantages of lithium-ion battery negative electrode materials prepared in the prior art, such as poor charge-discharge specific capacity, poor cycle stability, and crushed electrode materials

Method used

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  • A kind of preparation method of negative electrode material of lithium ion battery
  • A kind of preparation method of negative electrode material of lithium ion battery
  • A kind of preparation method of negative electrode material of lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The first step, preparation of CuS material

[0033] 1. Dissolve 0.01mol of copper chloride dihydrate (1.70g) into 35ml of ethylene glycol, and stir until completely dissolved to form a green solution (A);

[0034] 2. Take another beaker, dissolve 0.04mol thiourea (3.04g) into 35ml ethylene glycol, and stir until completely dissolved to obtain solution (B);

[0035] 3. Add all the thiourea solution (B) into the copper chloride solution (A), and stir while heating (heating temperature 60°C). After stirring for 5 minutes, white flocculent precipitates will appear in the solution, and it will become milky after stirring for 10 minutes. solution, after 10min the solution turned into a yellow mixture;

[0036] 4. Transfer the solution into the high-pressure hydrothermal reactor and close the reactor;

[0037] 5. Put the reaction kettle in a constant temperature oven, raise the temperature to 140°C, then store it at a constant temperature at 140°C for 4 hours, and then cool...

Embodiment 2

[0048] 1. Dissolve 0.02mol of copper chloride dihydrate (3.40g) into 70ml of ethylene glycol, stir until completely dissolved, and generate a green solution (A);

[0049] 2. Take another beaker, dissolve 0.08mol thiourea (6.08g) into 70ml ethylene glycol, and stir it until it is completely dissolved to obtain solution (B);

[0050] 3. Add all the thiourea solution (B) into the copper chloride solution (A), and stir while heating (heating temperature 70°C). After stirring for 6 minutes, white flocculent precipitates will appear in the solution, and it will become milky after stirring for 10 minutes. solution, after 10min the solution turned into a yellow mixture;

[0051] 4. Transfer the solution into the high-pressure hydrothermal reactor and close the reactor;

[0052] 5. Place the reaction kettle in a constant temperature oven, raise the temperature to 150°C, then store it at a constant temperature at 150°C for 3 hours, and then cool it down to room temperature naturally; ...

Embodiment 3

[0066] 1. Dissolve 0.03mol of copper chloride dihydrate (5.10g) into 105ml of ethylene glycol, stir until completely dissolved, and generate a green solution (A);

[0067] 2. Take another beaker, dissolve 0.12mol thiourea (9.12g) into 105ml ethylene glycol, and stir it until it is completely dissolved to obtain solution (B);

[0068] 3. Add all the thiourea solution (B) into the copper chloride solution (A), and stir while heating (heating temperature 80°C). After stirring for 7 minutes, white flocculent precipitates will appear in the solution, and it will become milky after stirring for 10 minutes. solution, after 10min the solution turned into a yellow mixture;

[0069] 4. Transfer the solution into the high-pressure hydrothermal reactor and close the reactor;

[0070] 5. Place the reaction kettle in a constant temperature oven, raise the temperature to 160°C, then store it at a constant temperature at 160°C for 2 hours, and then cool it down to room temperature naturally;...

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Abstract

The invention relates to a preparation method of a negative electrode material of a lithium ion battery. The method prepares CuS material by hydrothermal method, then composites graphene by spray drying method, and then converts the CuS in the composite to CuS in the composite material under hydrogen atmosphere. 2 , and then the processed lithium product is used as the negative electrode material of the lithium-ion battery. The invention overcomes the defects of poor charge-discharge specific capacity, poor cycle stability and crushed electrode material of the negative electrode material of the lithium ion battery prepared in the prior art.

Description

technical field [0001] The technical solution of the present invention relates to a preparation method of a high specific capacity lithium ion battery negative electrode material, in particular to a method for combining CuS and CuS 2 The invention discloses a method for compounding a co-melt and graphene (GO) as a negative electrode material of a lithium-ion battery, belonging to the field of material chemistry. Background technique [0002] Non-renewable resources such as traditional fossil fuels are not only increasingly depleted, but also bring about environmental and ecological problems, restricting economic development, which forces people to find and develop new renewable green energy. Solar energy, wind energy, tidal energy, etc. are limited by climate, region, environment and other conditions, and energy conversion and storage equipment are needed to convert and utilize chemical power sources, which is one of the most important ways of energy storage and conversion. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/0525
CPCH01M4/362H01M4/5815H01M4/625H01M10/0525Y02E60/10
Inventor 张永光张俊凡
Owner SYNERGY INNOVATION INST OF GDUT HEYUAN
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