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Preparation method of hexagonal lamellar SnS2 sodium-ion battery anode material

A technology of sodium ion battery and negative electrode material, which is applied to battery electrodes, circuits, electrical components, etc., can solve the problems of long reaction time of powder, difficult control of particle morphology, and easy occurrence of intermediate impurities, etc., and achieves short preparation cycle and excellent performance. Charge/discharge rate performance, the effect of strong crystallinity

Inactive Publication Date: 2017-05-31
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The hydrothermal method has many advantages that other methods cannot match. 2 The powder has problems such as long reaction time, difficult control of particle shape, and easy occurrence of intermediate impurities.

Method used

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  • Preparation method of hexagonal lamellar SnS2 sodium-ion battery anode material

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Embodiment 1

[0035] A hexagonal lamellar SnS 2 A preparation method for a negative electrode material for a sodium ion battery, comprising the following steps:

[0036] (1) Thioacetamide (CH 3 CSNH 2 ) was dissolved in deionized water, and the CH 3 CSNH 2 Stir until completely dissolved, and prepare solution A with a concentration of 0.5mol / L;

[0037] (2) Add hexadecylmethyltrimethylammonium bromide (CTAB) into solution A under the action of magnetic stirring until uniform suspension B is formed, ultrasonically disperse for 15-20 minutes to completely dissolve, and transparent and clear solution C is obtained;

[0038] (3) According to the element molar ratio n Sn :n S =1.0:1.2 tin tetrachloride pentahydrate (SnCl 4 ·5H 2 O) be dissolved in the transparent clear solution C, stir 10~15min under magnetic stirring condition and be mixed with solution D; The ratio of the molar concentration of Sn ion in the mixed solution D and the molar concentration of hexadecylmethyltrimethylammoni...

Embodiment 2

[0045] A hexagonal lamellar SnS 2 A preparation method for a negative electrode material for a sodium ion battery, comprising the following steps:

[0046] (1) Thioacetamide (CH 3 CSNH 2 ) was dissolved in deionized water, and the CH 3 CSNH 2 Stir until completely dissolved, and prepare solution A with a concentration of 0.9mol / L;

[0047] (2) Add hexadecylmethyltrimethylammonium bromide (CTAB) into solution A under the action of magnetic stirring until uniform suspension B is formed, ultrasonically disperse for 15-20 minutes to completely dissolve, and transparent and clear solution C is obtained;

[0048] (3) According to the element molar ratio n Sn :n S =1.0:2.0 tin tetrachloride pentahydrate (SnCl 4 ·5H 2 O) be dissolved in the transparent clear solution C, stir 10~15min under magnetic stirring condition and be mixed with solution D; The ratio of the molar concentration of Sn ion in the mixed solution D and the molar concentration of hexadecylmethyltrimethylammoni...

Embodiment 3

[0053] A hexagonal lamellar SnS 2 A preparation method for a negative electrode material for a sodium ion battery, comprising the following steps:

[0054] (1) Thioacetamide (CH 3 CSNH 2 ) was dissolved in deionized water, and the CH 3 CSNH 2 Stir until completely dissolved, and prepare solution A with a concentration of 1.2mol / L;

[0055] (2) Add hexadecylmethyltrimethylammonium bromide (CTAB) into solution A under the action of magnetic stirring until uniform suspension B is formed, ultrasonically disperse for 15-20 minutes to completely dissolve, and transparent and clear solution C is obtained;

[0056] (3) According to the element molar ratio n Sn :n S =1.0:2.4 tin tetrachloride pentahydrate (SnCl 4 ·5H 2 O) be dissolved in the transparent clear solution C, stir 10~15min under magnetic stirring condition and be mixed with solution D; The ratio of the molar concentration of Sn ion in the mixed solution D and the molar concentration of hexadecylmethyltrimethylammoni...

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Abstract

The invention discloses a preparation method of a hexagonal lamellar SnS2 sodium-ion battery anode material. The preparation method comprises the following steps: 1) dissolving thioacetamide into deionized water to obtain a solution A; 2) adding hexadecamethyl trimethyl ammonium bromide in the solution A to obtain a transparent clear solution C; 3) dissolving stannic chloride pentahydrate into the transparent clear solution C according to the element molar ratio of nSn to nS being 1.0 to (1.2 to 2.4), and uniformly mixing a mixture to obtain a mixed solution D; 4) regulating a pH value of the mixed solution D to be 1 to 9 so as to form a solution E; 5) carrying out microwave hydrothermal reaction on the obtained solution E; and 6) washing and freeze drying a product to obtain the hexagonal lamellar SnS2 sodium-ion battery anode material. The preparation method has the characteristics of low preparation cost, simpleness in operation and short preparation cycle. A prepared product has the lamination thickness reaching several to several tens nanometers, is high in purity, strong in crystallinity and uniform in morphology and has excellent charge-discharge rate performance by being applied to a sodium-ion battery anode.

Description

technical field [0001] The invention belongs to the technical field of negative electrode materials of sodium ion batteries, and in particular relates to a preparation method of negative electrode materials of sodium ion batteries. Background technique [0002] Sodium-ion battery is a new type of electrochemical power source, which has the advantages of abundant raw material resources, low cost, high specific capacity and high efficiency, and is more in line with the requirements of large-scale energy storage applications. It has application potential in improving power utilization efficiency and power quality. At the same time, due to its significant advantages such as high specific capacity, light weight, long life and no memory, it also has a wide range of applications in aerospace, hybrid electric vehicles and portable electronic devices. . In this context, sodium-ion batteries have attracted worldwide attention in recent years, and research on key materials and related...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58
CPCH01M4/5815Y02E60/10
Inventor 殷立雄白培杰柴思敏程如亮金东东张蓓张颖雷钰洁
Owner SHAANXI UNIV OF SCI & TECH
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