Method for preparing ultra-dispersed antimony selenide nanowires for sodium-ion battery negative electrodes with ultrasonic-assisted hydrothermal method

A sodium-ion battery, antimony selenide nanotechnology, applied in battery electrodes, nanotechnology for materials and surface science, negative electrodes, etc. Simple, high electrochemical capacity, high raw material utilization effect

Active Publication Date: 2017-09-08
SHAANXI UNIV OF SCI & TECH
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  • Abstract
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  • Claims
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Problems solved by technology

The use of these organic solvents is prone to danger in the preparation process, and the production cost is high, and the environmental pollution is also relatively large

Method used

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  • Method for preparing ultra-dispersed antimony selenide nanowires for sodium-ion battery negative electrodes with ultrasonic-assisted hydrothermal method
  • Method for preparing ultra-dispersed antimony selenide nanowires for sodium-ion battery negative electrodes with ultrasonic-assisted hydrothermal method
  • Method for preparing ultra-dispersed antimony selenide nanowires for sodium-ion battery negative electrodes with ultrasonic-assisted hydrothermal method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1) Add β-cyclodextrin to 20mL distilled water, and ultrasonically shake (300W, 40°C, 20min) to completely dissolve and disperse evenly to obtain solution A. Control the concentration of β-cyclodextrin to 0.565×10 -2 mol / L;

[0030] 2) Add 0.112g of tartaric acid and 0.0675g of antimony potassium tartrate into 30mL of distilled water, stir (500r / min, 20min) until completely dissolved, and obtain solution B;

[0031] 3) Disperse 0.0236g of selenium powder in 3mL of hydrazine hydrate with a mass concentration of 50%, and ultrasonically oscillate (300W, 50°C, 20min) to completely dissolve it to obtain wine red solution C;

[0032] 4) The obtained solution B was added dropwise to the solution A under the condition of stirring (500r / min) to obtain the mixed solution D;

[0033] 5) First, under the condition of stirring (500r / min), add the obtained wine red solution C dropwise into the mixed solution D, and stir evenly to obtain the mixed solution E; then, transfer the mixed ...

Embodiment 2

[0035] 1) Add β-cyclodextrin into 25mL of distilled water, and ultrasonically shake (600W, 70°C, 60min) to completely dissolve and disperse evenly to obtain solution A. Control the concentration of β-cyclodextrin to 1.13×10 -2 mol / L;

[0036] 2) Add 0.3g of tartaric acid and 0.6759g of antimony potassium tartrate into 25mL of distilled water, stir (700r / min, 60min) until completely dissolved, and obtain solution B;

[0037] 3) Disperse 0.2369g of selenium powder in 5mL of hydrazine hydrate with a mass concentration of 50%, and ultrasonically oscillate (600W, 70°C, 60min) to completely dissolve it to obtain wine red solution C;

[0038] 4) Add the obtained solution B to the solution A dropwise under stirring (700r / min) to obtain the mixed solution D;

[0039] 5) First, under the condition of stirring (700r / min), add the obtained wine red solution C dropwise into the mixed solution D, and stir evenly to obtain the mixed solution E; then, transfer the mixed solution E to a polyt...

Embodiment 3

[0043] 1) Add β-cyclodextrin to 20mL distilled water, and ultrasonically shake (200W, 40°C, 10min) to completely dissolve and disperse evenly to obtain solution A. Control the concentration of β-cyclodextrin to 1.695×10 -2 mol / L;

[0044] 2) Add 0.03g of tartaric acid and 0.0337g of antimony potassium tartrate into 40mL of distilled water, stir (500r / min, 10min) until completely dissolved, and obtain solution B;

[0045] 3) Disperse 0.0118g of selenium powder in 2mL of hydrazine hydrate with a mass concentration of 50%, and ultrasonically oscillate (200W, 40°C, 10min) to completely dissolve it to obtain wine red solution C;

[0046] 4) The obtained solution B was added dropwise to the solution A under the condition of stirring (500r / min) to obtain the mixed solution D;

[0047] 5) First, under the condition of stirring (500r / min), add the obtained wine red solution C dropwise into the mixed solution D, and stir evenly to obtain the mixed solution E; then, transfer the mixed s...

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Abstract

The invention relates to a method for preparing ultra-dispersed antimony selenide nanowires for sodium-ion battery negative electrodes with an ultrasonic-assisted hydrothermal method. The method includes: adding beta-cyclodextrin into distilled water, and performing ultrasonic oscillation to obtain a solution A; adding tartaric acid and antimony potassium tartrate into distilled water with stirring to obtain a solution B; dispersing selenium powder into hydrazine hydrate, and performing ultrasonic oscillation to obtain a wine red solution C; adding the solution B into the solution A drop by drop with stirring to obtain a mixed solution D; adding the wine red solution C into the mixed solution D drop by drop, and stirring evenly prior to hydrothermal reaction at the temperature of 130-180 DEG C for 3-24h to obtain the ultra-dispersed antimony selenide nanowires for sodium-ion battery negative electrodes. The ultra-dispersed Sb2Se3 nanowires for sodium-ion battery negative electrodes are prepared by adopting the rational additives and surfactants to effectively and successfully control the reaction process under the assistance of ultrasonic waves, and the method has the advantages of good reproducibility, high raw material utilization rate and short cycle and is applicable to large-scale production of Sb2Se3 electrode materials.

Description

technical field [0001] The present invention relates to a kind of hyperdisperse Sb 2 Se 3 The preparation of nanowires specifically relates to a method for ultrasonically assisted hydrothermal preparation of ultra-dispersed antimony selenide nanowires for sodium-ion battery negative poles. Background technique [0002] Sb 2 Se 3 It is a simple binary compound with a unique phase; Sb 2 Se 3 It is a direct bandgap P-type semiconductor with a typical layered structure. Its energy bandgap is 1.2eV, and the raw material price is low (Sb is equivalent to Cu, and Se is about 390 yuan per kilogram), with abundant reserves, green and low toxicity (medium Neither the United States nor the European Union has listed antimony selenide as a highly toxic or carcinogenic substance), and it has excellent properties such as photosensitivity, photoconductivity and pyroelectric effect. [0003] In recent years, Sb 2 Se 3 It has gradually become a research hotspot in the fields of chemis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B19/04B82Y30/00H01M4/58H01M10/054
CPCB82Y30/00C01B19/007C01P2002/72C01P2004/03C01P2004/61C01P2004/62H01M4/581H01M10/054H01M2004/027Y02E60/10
Inventor 曹丽云郭玲李嘉胤黄剑锋吴建鹏程娅伊齐慧王瑞谊
Owner SHAANXI UNIV OF SCI & TECH
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