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Method for hydrothermally and simply preparing spherical antimony selenide sodium ion battery cathode

A technology of sodium antimony selenide and negative electrode materials, applied in battery electrodes, secondary batteries, circuits, etc., to achieve good cycle performance, simple equipment, and good cycle stability

Active Publication Date: 2017-10-17
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While the reported Sb 2 Se 3 The anode material of sodium ion battery is mainly based on one-dimensional structure. For spherical Sb 2 Se 3 There are few reports of nanomaterials as anodes for sodium-ion batteries, so it is simple to develop a device that is low-cost, easy to operate, green and safe, and hydrothermally prepared spherical Sb with high capacity. 2 Se 3 The method of anode materials for sodium ion batteries is of great scientific significance, and has certain progressive significance for the development of anode materials for Sb-based sodium ion batteries

Method used

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  • Method for hydrothermally and simply preparing spherical antimony selenide sodium ion battery cathode
  • Method for hydrothermally and simply preparing spherical antimony selenide sodium ion battery cathode
  • Method for hydrothermally and simply preparing spherical antimony selenide sodium ion battery cathode

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Experimental program
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Effect test

Embodiment 1

[0025] 1) Add 0.0351g of antimony potassium tartrate, 0.0192g of citric acid and 0.03g of polyvinylpyrrolidone into 80mL of distilled water, and ultrasonically shake (200W, 40°C, 10min) to completely dissolve and disperse evenly to obtain solution A; among them, polyethylene The average molecular weight of pyrrolidone is 30000;

[0026] 2) Disperse selenium powder and sodium borohydride in distilled water, and ultrasonically oscillate (500W, 40°C, 10min) to dissolve it completely to obtain a transparent solution B, wherein the ratio of the amount of selenium powder to sodium borohydride is 0.156: 0.156, the concentration of sodium borohydride is 0.078mol / L, and the total volume of transparent solution B is 2mL;

[0027] 3) The obtained solution B was added dropwise to the solution A under the condition of stirring (500r / min, 30min) to obtain the mixed solution C;

[0028] 4) Firstly, put the mixed solution C into a polytetrafluoroethylene hydrothermal liner and put it into a ho...

Embodiment 2

[0030] 1) Add 0.1322g of antimony potassium tartrate, 0.0384g of citric acid and 0.1g of polyvinylpyrrolidone into 70mL of distilled water, and ultrasonically shake (300W, 50°C, 20min) to completely dissolve and disperse evenly to obtain solution A; among them, polyethylene The average molecular weight of pyrrolidone is 30000;

[0031] 2) Disperse selenium powder and sodium borohydride in distilled water, and ultrasonically oscillate (600W, 50°C, 20min) to dissolve it completely to obtain a transparent solution B, wherein the ratio of the amount of selenium powder to sodium borohydride is 0.525: 0.63, the concentration of sodium borohydride is 0.1575mol / L, and the total volume of solution B is 4mL;

[0032] 3) The obtained solution B was added dropwise to the solution A under the condition of stirring (500r / min, 20min) to obtain the mixed solution C;

[0033] 4) First, put the mixed solution C into a polytetrafluoroethylene hydrothermal liner and put it into a homogeneous rea...

Embodiment 3

[0035] 1) Add 0.3379g of antimony potassium tartrate, 0.0769g of citric acid and 0.15g of polyvinylpyrrolidone into 70mL of distilled water, and ultrasonically shake (400W, 40°C, 30min) to completely dissolve and disperse evenly to obtain solution A; among them, polyethylene The average molecular weight of pyrrolidone is 30000;

[0036] 2) Disperse selenium powder and sodium borohydride in distilled water, and ultrasonically oscillate (400W, 70°C, 10min) to dissolve it completely to obtain a transparent solution B, wherein the ratio of the amount of selenium powder to sodium borohydride is 1.47: 1.911, the concentration of sodium borohydride is 0.3822mol / L, and the total volume of solution B is 5mL;

[0037] 3) The obtained solution B was added dropwise to the solution A under the condition of stirring (600r / min, 40min) to obtain the mixed solution C;

[0038] 4) First, put the mixed solution C into a polytetrafluoroethylene hydrothermal liner and put it into a homogeneous re...

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Abstract

The invention discloses a method for hydrothermally and simply preparing a spherical antimony selenide sodium ion battery cathode. The method includes: adding antimony potassium tartrate, citric acid and polyvinylpyrrolidone into distilled water, and ultrasonically oscillating to obtain a solution A; dispersing selenium powder and sodium borohydride into distilled water, and ultrasonically oscillating to obtain a transparent solution B; dropwise adding the solution B into the solution A while stirring to obtain a mixed liquid C; putting the mixed liquid C in a homogeneous reactor, and allowing hydrothermal reaction at 120-180 DEG C for 1-12h to obtain the spherical antimony selenide sodium ion battery cathode. A spherical Sb2Se3 nano material is prepared creatively in simple hydrothermal conditions, has high discharging capacity and presents good circulating performance when serving as a sodium ion battery cathode material; the method is simple in equipment, high in repeatability and suitable for commercial production of Sb2Se3 nano materials.

Description

technical field [0001] The invention relates to a spherical Sb 2 Se 3 The preparation of the nanometer material particularly relates to a hydrothermal method for simply preparing the negative electrode material of the spherical antimony selenide sodium ion battery. Background technique [0002] With the continuous progress of society and the continuous popularization of electronic products, the demand and requirements for energy are also increasing. As a kind of electrochemical energy storage device with rich energy storage, high capacity and high performance, sodium ion battery has become a research hotspot in recent years. Sb-based materials due to their high Na + Intercalation capacity becomes one of the most promising candidates for anode materials for Na-ion batteries. [0003] Sb-based sodium ion battery anode materials mainly include Sb, Sb 2 o 3 , Sb 2 S 3 and the Sb developed in the past two years 2 Se 3 . Among them, Sb 2 Se 3 It is a typical Ⅴ-Ⅵ group...

Claims

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Application Information

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IPC IPC(8): H01M4/58H01M10/054B82Y40/00
CPCB82Y40/00H01M4/581H01M10/054Y02E60/10
Inventor 曹丽云郭玲李嘉胤黄剑锋吴建鹏程娅伊齐慧党欢
Owner SHAANXI UNIV OF SCI & TECH
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