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ZnS/SnS/antimonous sulfide [at] C hollow nanocube structure composite material, and preparation method and application thereof

A technology of antimony trisulfide and composite materials, applied in the direction of antimony sulfide, chemical instruments and methods, zinc sulfide, etc., can solve problems such as failure to meet high energy requirements, loss of electrical contact of collectors, hindrance to practical applications, etc., to avoid capacity decay The effect of being too fast, the equipment is easy to operate, and the reaction temperature and time are easy to control

Active Publication Date: 2020-03-27
GUANGDONG UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the specific capacity of traditional commercial graphite anodes is limited (the specific capacity of LIBs is 372mAh g-1), which cannot meet a wide range of high-energy demand applications; SnS, ZnS, Sb 2 S 3 Both have high capacity, and batteries using them as negative electrode materials should theoretically have good rate performance and long cycle life, but due to the harmful volume expansion of metal sulfides as active substances during charge and discharge, the electrodes disintegrate and gradually lose their electrical contacts for current collectors
The volume expansion of the three active materials leads to electrode pulverization during charge and discharge, resulting in poor conductivity and fast capacity decay, hindering their practical application

Method used

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  • ZnS/SnS/antimonous sulfide [at] C hollow nanocube structure composite material, and preparation method and application thereof
  • ZnS/SnS/antimonous sulfide [at] C hollow nanocube structure composite material, and preparation method and application thereof
  • ZnS/SnS/antimonous sulfide [at] C hollow nanocube structure composite material, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1. Add 50mL of 0.4mol / LSnCl 4 Solution and 100mL containing 0.2mol / L sodium citrate solution and 100mL0.1mol / L ZnCl 2 The mixture of the solution was mixed and stirred, and 500 mL of 0.3 mol / L NaOH solution was added to the above solution under continuous stirring, and 0.1 mol / L NaOH solution was slowly added after stirring for 0.5 h. Afterwards, it was washed, dried and filtered to obtain zinc hydroxystannate powder (H-ZHS).

[0035] 2. Disperse 0.8 g of zinc hydroxystannate powder (H-ZHS) in 400 mL of deionized water and sonicate for 10 min. Subsequently, 0.2g of dopamine was added and stirred at room temperature, washed, filtered and dried to obtain H-ZnSn(OH) 6 @PDA(H-ZHS@PDA).

[0036] 3. Place 1g of H-ZHS@PDA and 14g of thiourea powder in a tube furnace, heat to 300°C in a hydrogen atmosphere and keep it warm for 1h. After cooling to room temperature, H-ZnS-SnS is obtained 2@PDA.

[0037] 4. Use 1g antimony trichloride and 50ml absolute ethanol solution with ...

Embodiment 2

[0041] 1. Add 100mL of 0.4mol / LSnCl 4 Solution and 100mL containing 0.4mol / L sodium citrate solution and 100mL0.2mol / LZnCl 2 The mixture of the solution was mixed and stirred, and 500 mL of 0.3 mol / L NaOH solution was added to the above solution under continuous stirring, and after stirring for 0.5 h, 0.1 mol / L NaOH solution was slowly added, washed, dried and filtered to obtain zinc hydroxystannate powder (H-ZHS ).

[0042] 2. Disperse 1 g of zinc hydroxystannate powder (H-ZHS) in 400 mL of deionized water and sonicate for 15 min. Then add 0.4g dopamine and stir at room temperature, wash, filter and dry to obtain H-ZnSn(OH) 6 @PDA(H-ZHS@PDA).

[0043] 3. Place 1g of H-ZHS@PDA and 14g of thiourea powder in a tube furnace, heat to 320°C in a hydrogen atmosphere and keep it warm for 1h. After cooling to room temperature, H-ZnS-SnS is obtained 2 @PDA.

[0044] 4. Use 1g antimony trichloride and 50ml absolute ethanol solution with 0.3gH-ZnS-SnS 2 @PDA is heated in a water ba...

Embodiment 3

[0047] 1. Dissolve 250mL of 0.2M SnCl 4 ·5H 2 O solution and 250mL containing 0.2mol / L sodium citrate solution and 250mL0.2mol / LZnCl 2 The mixture of the solution was mixed and stirred, and 500 mL of 0.3 mol / L NaOH solution was added to the above solution under continuous stirring, and after stirring for 0.5 h, 0.1 mol / L NaOH solution was slowly added, washed, dried and filtered to obtain zinc hydroxystannate powder (H- ZHS).

[0048] 2. Disperse 1.2 g of zinc hydroxystannate powder (H-ZHS) in 400 mL of deionized water and sonicate for 20 min. Subsequently, 0.4 g of dopamine was added and stirred at room temperature, washed, filtered and dried to obtain H-ZHS@PDA.

[0049] 3. Place 1g of H-ZHS@PDA and 14g of thiourea powder in a tube furnace, heat to 350°C in a hydrogen atmosphere and keep it warm for 1h. After cooling to room temperature, H-ZnS-SnS is obtained 2 @PDA.

[0050] 4. Use 1g antimony trichloride and 50ml absolute ethanol solution with 0.3gH-ZnS-SnS 2 @PDA is...

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Abstract

The invention belongs to the technical field of batteries, and discloses a ZnS / SnS / antimony trisulfide [at] C hollow nanocube structure composite material, and a preparation method and application thereof. The composite material is prepared by the following steps: mixing water, tin tetrachloride, sodium citrate, zinc chloride and sodium hydroxide, washing with water, and drying to obtain H-ZHS; ultrasonically dispersing H-ZHS in an aqueous solution, adding sodium hydroxide or potassium hydroxide for etching, adding dopamine, stirring, washing with water and drying to obtain H-ZHS[at]PDA; adding H-ZHS[at]PDA and thiourea; vulcanizing in a hydrogen atmosphere at the temperature of 300-350 DEG C; cooling to room temperature, mixing the obtained H-SnS<2> / ZnS[at]PDA, antimony trichloride and absolute ethyl alcohol, carrying out hydrothermal reaction at 90-120 DEG C, washing with water, drying, carbonizing the obtained H-ZnS / SnS<2> / Sb<2>S<3>[at]PDA in an argon atmosphere at 500-530 DEG C, and cooling to room temperature, so as to obtain the H-SnS<2> / Sb<2>S<3>[at]PDA.

Description

technical field [0001] The invention belongs to the technical field of electrode materials for sodium ion batteries and lithium ion batteries, and more specifically relates to a ZnS / SnS / antimony trisulfide (Sb 2 S 3 )@C Hollow nanocube structure composite material and its preparation method and application. Background technique [0002] In recent years, rechargeable Li-ion batteries and Na-ion batteries have become the main power sources and research hotspots of various portable electronic devices due to their light weight, portability, and high energy density. However, the specific capacity of traditional commercial graphite anodes is limited (the specific capacity of LIBs is 372mAh g-1), which cannot meet a wide range of high-energy demand applications; SnS, ZnS, Sb 2 S 3 Both have high capacity, and batteries using them as negative electrode materials should theoretically have good rate performance and long cycle life, but due to the harmful volume expansion of metal s...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/0525H01M10/054C01G9/08C01G19/00C01B32/05C01G30/00B82Y30/00
CPCH01M4/366H01M4/5815H01M4/625H01M10/0525H01M10/054C01G9/08C01G19/00C01G30/008C01B32/05B82Y30/00C01P2004/80C01P2004/38C01P2004/62C01P2004/03C01P2004/04Y02E60/10
Inventor 闵永刚陈妙玲廖松义王凌志曹景茹张增耀
Owner GUANGDONG UNIV OF TECH
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