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A microwave hydrothermal method for preparing beam-shaped antimony selenide electrode materials for sodium-ion battery negative electrodes

A sodium-ion battery, microwave hydrothermal technology, applied in battery electrodes, negative electrodes, nanotechnology for materials and surface science, etc., can solve the problems of poor cycle stability, limited wide application, etc., achieve full contact, shorten transmission path, the effect of improving electrochemical performance

Active Publication Date: 2019-07-16
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, Sb 2 Se 3 It has the same problem as most oxygen / sulfur / selenides, that is, poor cycle stability, which greatly limits its wide application. Therefore, it is necessary to improve the battery reactivity by controlling the morphology of the product, and by reducing the size of the material To increase the contact area with the electrolyte and improve battery performance

Method used

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  • A microwave hydrothermal method for preparing beam-shaped antimony selenide electrode materials for sodium-ion battery negative electrodes
  • A microwave hydrothermal method for preparing beam-shaped antimony selenide electrode materials for sodium-ion battery negative electrodes
  • A microwave hydrothermal method for preparing beam-shaped antimony selenide electrode materials for sodium-ion battery negative electrodes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1) Add 0.01g polyvinylpyrrolidone with an average molecular weight of 30000 and 0.1g sodium dodecylsulfonate into distilled water, ultrasonically shake (300W, 40°C, 60min) to completely dissolve and disperse evenly, add 0.0091g ​​trichloro Antimony, mixed solution A is obtained under stirring (500r / min, 10min) conditions, and the concentration of antimony trichloride is controlled to be 0.001mol / L;

[0027] 2) Disperse 0.0104g of sodium selenite in 3mL of hydrazine hydrate with a mass concentration of 50%, and stir (500r / min, 10min) to obtain wine red solution B;

[0028] 3) Add the obtained solution B to the solution A dropwise under continuous stirring (500r / min, 60min) to obtain the mixed solution C;

[0029] 4) Put the mixed solution C into a microwave reactor with a volume filling degree of 40%, then seal the reactor, put it into a microwave hydrothermal reactor, and select the temperature control mode for reaction at a heating rate of 3°C / min The temperature was ...

Embodiment 2

[0031] 1) Add 0.05g of polyvinylpyrrolidone with an average molecular weight of 30,000 and 0.2g of sodium dodecylsulfonate into distilled water, ultrasonically oscillate (600W, 50°C, 50min) to completely dissolve and disperse evenly, and add 0.1027g of trichloro Antimony, mixed solution A is obtained under stirring (600r / min, 20min) conditions, and the concentration of antimony potassium tartrate is controlled to be 0.01mol / L;

[0032]2) Disperse 0.1167g of sodium selenite in 4mL of hydrazine hydrate with a mass concentration of 50%, and stir (600r / min, 10min) to obtain wine red solution B;

[0033] 3) Add the obtained solution B to the solution A dropwise under continuous stirring (600r / min, 50min) to obtain the mixed solution C;

[0034] 4) Put the mixed solution C into a microwave reactor with a volume filling degree of 45%, then seal the reactor, put it into a microwave hydrothermal reactor, select the temperature control mode to react, and use a heating rate of 5°C / min T...

Embodiment 3

[0036] 1) Add 0.1g of polyvinylpyrrolidone with an average molecular weight of 30,000 and 0.3g of sodium dodecylsulfonate into distilled water, ultrasonically oscillate (500W, 50°C, 40min) to completely dissolve and disperse evenly, and add 0.2281g of trichloro Antimony, mixed solution A is obtained under stirring (500r / min, 10min) conditions, and the concentration of antimony trichloride is controlled to be 0.02mol / L;

[0037] 2) Disperse 0.2594g of sodium selenite in 5mL of hydrazine hydrate with a mass concentration of 50%, and stir (500r / min, 30min) to obtain wine red solution B;

[0038] 3) The obtained solution B was added dropwise to the solution A under the condition of continuous stirring (500r / min, 40min) to obtain the mixed solution C;

[0039] 4) Put the mixed liquid C into the microwave reactor, the volume filling degree is 50%, then seal the reactor, put it into the microwave hydrothermal reactor, select the temperature control mode to react, and the temperature ...

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Abstract

The invention discloses a method for microwave hydrothermal method for preparing sarciniform antimony selenide electrode material for the cathode of a sodium-ion battery. The method comprises the steps of adding polyvinylpyrrolidone and sodium dodecyl sulfate into distilled water, adding antimony trichloride after ultrasonic oscillation, and stirring to acquire mixed liquid A; dispersing sodium selenite into hydrazine hydrate, and stirring to acquire wine red solution B; dropwise adding the solution B into the solution A under the condition of continuous stirring to acquire the mixed liquid C; putting the mixed liquid C into a microwave hydrothermal reaction instrument to react for 0.5h-3h at the temperature of 150 DEG C and 200 DEG C so as to acquire the sarciniform antimony selenide electrode material for the cathode of the sodium-ion battery. According to the method provided by the invention, the nanowire assembly sarciniform Sb2Se3 nanomaterial is prepared by using the microwave hydrothermal reaction instrument to serve as the cathode of the sodium-ion battery, and excellent electrochemical performance is provided; and the method is simple in technology, short in period, high in material utilization rate, and applicable to industrial production of Sb2Se3 electrode material.

Description

technical field [0001] The invention relates to a bundled Sb 2 Se 3 The invention relates to the preparation of nanometer materials, in particular to a microwave hydrothermal method for preparing beam-shaped antimony selenide electrode materials for sodium-ion battery negative poles. Background technique [0002] Due to the characteristics of high theoretical capacity, abundant resources, and similar electrochemical behavior to lithium-ion batteries, sodium-ion batteries have become a research hotspot in the field of electrochemical energy storage in recent years. Sb 2 Se 3 It is a V-VI group compound with a layered structure. It is used as an anode material for sodium-ion batteries. 1mol of Sb 2 Se 3 Can embed 12mol of Na + , and the conversion reaction that takes place is a reversible process, which promotes the Sb 2 Se 3 Has a high theoretical capacity: 678mAh g -1 . In related reports, WenxiZhao et al. used the "one-pot cooking" method to prepare Sb 2 Se 3 Co...

Claims

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Application Information

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Patent Type & Authority Patents(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许占位程娅伊齐慧
Owner SHAANXI UNIV OF SCI & TECH
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