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Negative electrode material of lithium ion battery and preparation method of negative electrode material

A lithium-ion battery and negative electrode material technology, applied in the field of electrochemistry, can solve the problems of poor cycle performance and high electrolyte selectivity, and achieve the effects of low-cost raw materials, excellent rate characteristics, and high gram specific capacity

Inactive Publication Date: 2016-12-21
江西丰日电源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The most widely used negative electrode material is graphite, which has the disadvantages of poor cycle performance and high selectivity to electrolyte

Method used

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  • Negative electrode material of lithium ion battery and preparation method of negative electrode material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1. Weigh 0.494g porous carbon in 100ml deionized water and ultrasonically disperse evenly, then 1.39gFeSO 4 Dissolved in a solution of porous carbon to obtain a; 1.646g K 3 Fe(CN) 6 Dissolve in 100 ml deionized water to obtain b. Slowly titrate solution b into mixed solution a, continue stirring for 12 hours, centrifuge, wash, and dry to obtain a composite material.

Embodiment 2

[0024] Embodiment 2. Weigh 0.247g carbon nanotubes in 150ml deionized water and ultrasonically disperse evenly, then 4.36g Ni(NO 3 ) 2 Dissolved in the solution system of carbon nanotubes to obtain a; 4.939g K 3 Fe(CN) 6 Dissolve in 150 ml deionized water to obtain b. Slowly titrate solution b into mixed solution a, continue stirring for 12 hours, centrifuge, wash, and dry to obtain a composite material.

Embodiment 3

[0025] Embodiment 3. Weigh 0.247g graphene in 150ml deionized water and ultrasonically disperse evenly, then 2.18gNi(NO 3 ) 2 and 2.33g Co (NO 3 ) 2 Dissolved in the solution of graphene to obtain a; 4.939g K 3 Fe(CN) 6 Dissolve in 150 ml deionized water to obtain b. Slowly titrate solution b into mixed solution a, continue to stir for 12 hours, centrifuge, wash, and dry to obtain a composite material.

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Abstract

The invention provides a negative electrode material of a lithium ion battery. The negative electrode material is an in-situ compound of a prussian blue derivative and a high-conductivity carbon material and has high specific capacity per gram and excellent rate property, and the lithium ion battery applying the material has favorable cycle stability. Meanwhile, the invention provides a preparation method of the material. With a low-cost raw material and low-energy consumption synthesis circuit, the material and the preparation process has excellent economic characteristics.

Description

technical field [0001] The invention belongs to the field of electrochemistry, and relates to lithium-ion battery negative electrode materials, preparation methods and applications Background technique [0002] As an emerging green electrochemical energy source, lithium-ion batteries are widely used in various portable devices and power batteries. The performance of lithium-ion batteries is mainly determined by three major factors: positive electrode, negative electrode and electrolyte. It can be seen that the negative electrode material is one of the important factors affecting the performance of lithium-ion batteries. The most widely used negative electrode material is graphite, which has the disadvantages of poor cycle performance and high selectivity to electrolyte. [0003] Prussian blue derivatives have attracted extensive attention as positive electrode materials for rechargeable batteries, especially as positive electrodes for sodium-ion batteries, due to their open...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/60H01M4/587H01M10/0525
CPCH01M4/364H01M4/587H01M4/60H01M10/0525Y02E60/10
Inventor 黎福根康书文罗继欧阳文胜
Owner 江西丰日电源有限公司
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