Stannic selenide/graphene oxide negative pole composite material for sodium ion battery and preparation method thereof

A graphene negative electrode, sodium ion battery technology, applied in nanotechnology for materials and surface science, electrode manufacturing, battery electrodes, etc., can solve the problem of no composite material sodium battery negative electrode material, graphene oxide and SnSe composite preparation composite Material technology and other issues to achieve the effect of avoiding excessive capacity decay, improving cycle stability, and high discharge specific capacity

Active Publication Date: 2015-05-13
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there is no technology to prepare composite materials by combining graphene oxide and SnSe, and there is no related report on composite materials as anode materials for sodium batteries.

Method used

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  • Stannic selenide/graphene oxide negative pole composite material for sodium ion battery and preparation method thereof
  • Stannic selenide/graphene oxide negative pole composite material for sodium ion battery and preparation method thereof
  • Stannic selenide/graphene oxide negative pole composite material for sodium ion battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042]Take by weighing 5g of flaky graphite with a purity of 99.5%, add it into a mixed solution containing 350mL mass fraction of 98% concentrated sulfuric acid and 50mL mass fraction of 85% phosphoric acid, add 30g potassium permanganate in batches for oxidation, the The mixed solution was kept at 0° C., stirred for 2 h, then stirred in a water bath at room temperature for 12 h, and further stirred at 80° C. for 0.5 h to obtain a mixture. 350 mL of deionized water was slowly added to the mixture under ice bath conditions. After 15 minutes, add 15g of hydrogen peroxide to remove potassium permanganate, then the color of the mixture turns bright yellow, filter with suction, wash with dilute hydrochloric acid with a concentration of 10% for 3 times, filter with suction, and dry in vacuum at 60°C for 48 hours to obtain graphite oxide ene (GO).

[0043] Weigh 0.3g GO, add 20mL deionized water and 40mL ethylene glycol to ultrasonically disperse for 3h to form a dispersion liquid,...

Embodiment 2

[0051] Take by weighing 3g of flaky graphite with a purity of 99.5%, add it to a mixed solution containing 350mL mass fraction of 98% concentrated sulfuric acid and 50mL mass fraction of 85% phosphoric acid, and add 18g potassium permanganate in batches for oxidation. The mixed solution was kept at 0° C., stirred for 2 h, then stirred in a water bath at room temperature for 12 h, and further stirred at 80° C. for 0.5 h to obtain a mixture. 350 mL of deionized water was slowly added to the mixture under ice bath conditions. After 15 minutes, add 9g of hydrogen peroxide to remove potassium permanganate, then the color of the mixture turns bright yellow, filter with suction, wash with dilute hydrochloric acid with a concentration of 10% for 3 times, filter with suction, and dry in vacuum at 60°C for 48 hours to obtain graphite oxide ene (GO).

[0052] Weigh 0.3g GO, add 40mL deionized water and 80mL ethylene glycol to ultrasonically disperse for 3h to form a dispersion liquid, t...

Embodiment 3

[0056] Take by weighing 5g of flaky graphite with a purity of 99.5%, add it into a mixed solution containing 300mL mass fraction of 98% concentrated sulfuric acid and 50mL mass fraction of 85% phosphoric acid, add 30g potassium permanganate in batches for oxidation, and The mixed solution was kept at 0° C., stirred for 2 h, then stirred in a water bath at room temperature for 12 h, and further stirred at 80° C. for 0.5 h to obtain a mixture. 350 mL of deionized water was slowly added to the mixture under ice bath conditions. After 15 minutes, add 15g of hydrogen peroxide to remove potassium permanganate, then the color of the mixture turns bright yellow, filter with suction, wash with dilute hydrochloric acid with a concentration of 10% for 3 times, filter with suction, and dry in vacuum at 60°C for 48 hours to obtain graphite oxide ene (GO).

[0057] Weigh 0.1g GO, add 30mL deionized water and 60mL ethylene glycol to ultrasonically disperse for 3h to form a suspension, then ...

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Abstract

The invention discloses a stannic selenide / graphene oxide negative pole composite material for a sodium ion battery and a preparation method thereof. The negative pole composite material is formed by uniformly growing nanometer stannic selenide on the surface of graphene oxide. The preparation method comprises the following steps of: ultrasonically dispersing graphene oxide powder into a mixed solution of water and ethylene glycol to obtain a dispersion solution; adding tin salt and selenite to the dispersion solution, then carrying out hydrothermal reaction, and placing a hydrothermal reaction product into an inert gas protective tube furnace for heat treatment so as to obtain a negative pole composite material which has nanometer sheet-like morphology and is formed by uniformly growing nanometer stannic selenide on the surface of graphene oxide. The composite material disclosed by the invention can be used for preparing the sodium ion battery which has the characteristics of high discharging specific capacity, excellent magnification property, long cycle life and the like. The preparation method disclosed by the invention has the advantages of simplicity, reliability, good process repeatability, high operability, low cost and suitability for industrialized production.

Description

technical field [0001] The invention relates to a preparation method of a tin selenide / graphene oxide negative electrode material used in a sodium ion battery, and belongs to the field of sodium ion batteries. Background technique [0002] Lithium-ion batteries are currently the dominant electrochemical energy storage system. With the rapid popularization of mobile devices such as personal computers, cameras, and mobile phones, and the good application prospects in electric vehicles and hybrid vehicles, the demand for lithium-ion batteries continues to increase. Increasing lithium prices and limited reserves have become bottlenecks in mass production and large-scale commercialization. Sodium-ion batteries have attracted widespread attention due to their abundant resource reserves and low cost. The research and development of sodium-ion batteries can alleviate the limited development of batteries caused by the shortage of lithium resources to a certain extent. However, becau...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M4/04H01M10/054B82Y30/00
CPCB82Y30/00H01M4/131H01M4/364H01M10/05Y02E60/10
Inventor 张治安赵星星张娟赖延清李劼
Owner CENT SOUTH UNIV
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