Preparation method of cubic nanometer zinc-tin sulfide for negative electrode material of sodium ion battery

A sodium-ion battery and negative electrode material technology, applied in the direction of zinc sulfide, battery electrodes, nanotechnology for materials and surface science, etc., can solve the problems of short cycle life, poor cycle stability of tin-based materials, etc., and achieve long cycle life , improve cycle stability, and avoid the effect of specific capacity reduction

Active Publication Date: 2019-01-29
帕瓦(兰溪)新能源科技有限公司
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, research on tin-based sulfide anode materials for sodium-ion batteries has become a hot spot. At present, there are many tin-based sulfide anode materials reported in relevant literature, and the specific capacity has been greatly improved compared with graphite anodes. However, the cycle of tin-based materials The problems of relatively poor stability and short cycle life have not been well resolved, and have become obstacles in the process of restricting the industrial application and promotion of tin-based sulfides.

Method used

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  • Preparation method of cubic nanometer zinc-tin sulfide for negative electrode material of sodium ion battery
  • Preparation method of cubic nanometer zinc-tin sulfide for negative electrode material of sodium ion battery
  • Preparation method of cubic nanometer zinc-tin sulfide for negative electrode material of sodium ion battery

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Effect test

Embodiment 1

[0028] (1) Dissolve 2.3g of tin tetrachloride in 100ml of absolute ethanol, stir magnetically at room temperature for 2 hours until a clear solution is formed; weigh 1.64g of zinc chloride and dissolve in 200ml of deionized water, stir magnetically at room temperature for 2 hour to form a clear solution; the absolute ethanol that is dissolved with tin tetrachloride is poured into deionized water filled with zinc chloride and stirred at room temperature for 3 hours;

[0029] (2) Weigh a certain mass of sodium hydroxide particle solution in deionized water, and magnetically stir at room temperature for 2 hours to form a clear sodium hydroxide solution with a molar concentration of 3 mol / L;

[0030] (3) Add 50ml of sodium hydroxide solution with a molar concentration of 3mol / L to the mixed solution of tin source and zinc source obtained in step (1), stir magnetically at room temperature for 5 hours to form a uniform white suspension, and then use deionized Centrifugal washing wit...

Embodiment 2

[0035](1) Weigh 2.3g of tin tetrachloride and dissolve it in 100ml of absolute ethanol, stir magnetically at room temperature for 2 hours until a clear solution is formed; weigh 1.87g of zinc acetate and dissolve it in 300ml of deionized water, and stir magnetically for 2 hours at room temperature To form a clear solution; the absolute ethanol dissolved with tin tetrachloride was poured into deionized water containing zinc acetate and stirred at room temperature for 3 hours;

[0036] (2) Weigh a certain mass of sodium hydroxide particle solution in deionized water, and magnetically stir for 2 hours at room temperature to form a clear sodium hydroxide solution with a molar concentration of 5 mol / L;

[0037] (3) Add 60ml of sodium hydroxide solution with a molar concentration of 5mol / L to the mixed solution of tin source and zinc source obtained in step (1), stir magnetically at room temperature for 5 hours to form a uniform white suspension, and then use deionized Centrifugal w...

Embodiment 3

[0042] (1) Weigh 1.5g of stannous chloride and dissolve it in 100ml of absolute ethanol, stir magnetically for 2 hours at room temperature until a clear solution is formed; weigh 1.07g of zinc sulfate and dissolve it in 200ml of deionized water, stir magnetically for 2 hours at room temperature To form a clear solution; the absolute ethanol dissolved with tin protochloride was poured into deionized water containing zinc sulfate and stirred at room temperature for 3 hours;

[0043] (2) Weigh a certain mass of sodium hydroxide particle solution in deionized water, and magnetically stir at room temperature for 2 hours to form a clear sodium hydroxide solution with a molar concentration of 1 mol / L;

[0044] (3) Add 50ml of sodium hydroxide solution with a molar concentration of 1mol / L to the mixed solution of tin source and zinc source obtained in step (1), stir magnetically at room temperature for 5 hours to form a uniform white suspension, and then use anhydrous Ethanol centrifu...

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Abstract

The invention discloses a preparation method of cubic nanometer zinc-tin sulfide for a negative electrode material of a sodium ion battery. The preparation method comprises the following steps: weighing a zinc source and a tin source with certain stoichiometric ratios, dissolving the zinc source in deionized water and dissolving the tin source in absolute ethyl alcohol, mixing the obtained two solutions under a condition of room temperature and magnetic stirring after particles are completely dissolved, carrying out stirring until a uniform and clear solution is formed, then adding a sodium hydroxide solution with a certain molar concentration, using a formed sodium chloride template as a guiding agent and an inducer to enable the zinc source and the tin source to form a zinc-tin compoundwith uniform components and a cubic structure, and carrying out centrifugation and drying to obtain a zinc-tin compound precursor, then carrying out vulcanization treatment on the precursor in a reducing atmosphere, and naturally carrying out cooling to room temperature to obtain the cubic zinc-tin sulfide for the negative electrode material of the sodium ion battery. The preparation method disclosed by the invention is short in process flow and simple in equipment, has cheap and easily available raw materials, and is environmentally friendly, and cubic zinc-tin sulfide particles with different micro-scales can be obtained by adjusting corresponding process parameters.

Description

technical field [0001] The invention relates to a preparation method of a negative electrode material of a sodium ion battery, in particular to a preparation method of a cubic nano zinc tin sulfide material of a negative electrode material of a sodium ion battery. Background technique [0002] As a leader in the new generation of energy storage systems, lithium-ion batteries have excellent performances such as clean and non-polluting, high specific energy, high working voltage, small self-discharge, and long cycle life. They have been widely used in portable electronic products and various pure electric and plug-in hybrid vehicles. At present, the anode materials of commercial lithium-ion batteries mainly include natural graphite, lithium titanate, etc. Although these anode materials have good cycle stability and safety performance, their low theoretical specific capacity and power performance are difficult to meet the needs of future electric vehicles. The parameter requir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G19/00C01G9/08B82Y30/00B82Y40/00H01M4/58H01M10/054
CPCB82Y30/00B82Y40/00C01G9/08C01G19/00C01P2002/72C01P2004/03C01P2004/64H01M4/5815H01M10/054Y02E60/10
Inventor 欧星曹亮张宝张佳峰
Owner 帕瓦(兰溪)新能源科技有限公司
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