A metal selenium compound negative electrode material for lithium/sodium ion battery, preparation method and application

A sodium-ion battery, selenium compound technology, applied in metal selenide/telluride, binary selenium/tellurium compound, battery electrodes, etc., can solve the problems of unsatisfactory cycle performance and rate performance, and achieve low cost and reversible ratio. The effect of high capacity and simple process

Active Publication Date: 2021-07-13
XIAMEN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lithium can react with many elements, such as silicon, selenium, bismuth, zinc, etc., and compounds of these elements can be used to develop negative electrode materials. However, at present, the negative electrodes of lithium / sodium ion batteries prepared by metal selenium compounds are The cycle performance and rate performance of the material are not ideal enough

Method used

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  • A metal selenium compound negative electrode material for lithium/sodium ion battery, preparation method and application
  • A metal selenium compound negative electrode material for lithium/sodium ion battery, preparation method and application
  • A metal selenium compound negative electrode material for lithium/sodium ion battery, preparation method and application

Examples

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Effect test

Embodiment 1

[0039] The preparation steps of NiSe negative electrode material are as follows:

[0040] 1) First cut the nickel foam into a size of 3.6×3.6cm, put it into 20mL deionized water for ultrasonic cleaning, and then dry it;

[0041] 2) put the dried nickel foam into 20mL of 1mol / L hydrochloric acid solution for three minutes and sonicate for acidification;

[0042] 3) The nickel foam after the acidification treatment was rinsed with deionized water, put into 20mL deionized water for ultrasonic cleaning for three minutes, and then dried;

[0043] 4) Put 0.52g of sodium selenite and 2g of anhydrous glucose into 50ml of deionized water for ultrasonic dissolution to obtain a mixed solution;

[0044] 5) Then put the dry nickel foam into the mixed solution for three minutes of ultrasonic treatment;

[0045] 6) After ultrasonication, put the mixed solution and nickel foam together into a hydrothermal reaction kettle, then put the hydrothermal reaction kettle into an electric constant t...

Embodiment 2

[0048] The preparation steps of CuSe negative electrode material are as follows:

[0049] 1) First cut the foamed copper into 3.6×3.6cm size, put it into 20mL deionized water, ultrasonically clean it, and then dry it;

[0050] 2) Put the dried copper foam into 20mL of 1mol / L hydrochloric acid solution for three minutes and sonicate for acidification;

[0051] 3) Rinse the acidified copper foam with deionized water, put it into 20mL deionized water for ultrasonic cleaning for three minutes, and then dry it;

[0052] 4) Put 0.52g of sodium selenite and 2g of ethylenediamine together into 50ml of deionized water for ultrasonic dissolution to obtain a mixed solution;

[0053] 5) Then put the dry copper foam into the mixed solution for three minutes of ultrasonic treatment;

[0054] 6) After ultrasonication, put the mixed solution and copper foam together into the hydrothermal reaction kettle, then put the hydrothermal reaction kettle into the electric constant temperature blast dr...

Embodiment 3

[0057] The preparation steps of CoSe negative electrode material are as follows:

[0058] 1) First cut the cobalt foam into a size of 3.6×3.6cm, put it into 20mL deionized water for ultrasonic cleaning, and then dry it;

[0059] 2) put the dried foamed cobalt into 20mL of 1mol / L hydrochloric acid solution and sonicate for three minutes for acidification;

[0060] 3) The acidified cobalt foam was rinsed with deionized water, put into 20mL deionized water for ultrasonic cleaning for three minutes, and then dried;

[0061] 4) Put 0.52g of sodium selenite and 2g of hydrazine hydrate together into 50ml of deionized water for ultrasonic dissolution to obtain a mixed solution;

[0062] 5) Then put the dried cobalt foam into the mixed solution for three minutes of ultrasonic treatment;

[0063] 6) After ultrasonication, put the mixed solution and cobalt foam together into a hydrothermal reaction kettle, then put the hydrothermal reaction kettle into an electric constant temperature ...

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Abstract

The invention provides a method for preparing a metal selenium compound negative electrode material for a lithium / sodium ion battery, which is characterized in that it comprises the following steps: S1, ultrasonicating the foam metal in an acid solution, and performing acidification treatment; S2, acidifying the foamed metal The foamed metal is immersed in a mixed solution of selenite and reducing agent, subjected to ultrasonic treatment, and then subjected to high-temperature hydrothermal reaction to obtain the metal selenium compound negative electrode material for lithium / sodium ion batteries. The lithium / sodium ion battery prepared from the negative electrode material has excellent cycle performance and rate performance.

Description

technical field [0001] The invention relates to a metal selenium compound negative electrode material for lithium / sodium ion batteries, belonging to the technical field of lithium / sodium ion batteries. Background technique [0002] Lithium / sodium ion batteries have the advantages of high working voltage, high specific capacity, large output power, good cycle performance, and environmental protection. They are widely used in electronic equipment, electric vehicles, and new energy power station energy storage systems. [0003] The negative electrode material of lithium / sodium ion batteries is mainly graphite, which has excellent cycle stability and high Coulombic efficiency, but when graphite is used as the negative electrode material, lithium is easily deposited on the surface of the negative electrode during fast charging, reducing the battery life. performance. On the other hand, graphite-based materials are mainly derived from petroleum, and our country is short of petrol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B19/04C01B32/05H01M4/58H01M10/0525H01M10/054
CPCC01B19/007C01P2002/72C01P2004/03C01P2004/80C01P2006/40C01B32/05H01M4/581H01M10/0525H01M10/054H01M2004/027Y02E60/10
Inventor 李晓丹张旻澍张文堤余泽锦张衍萍宋志成
Owner XIAMEN UNIV OF TECH
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