Multilevel-structured VS4 nano-powder, and preparation method and application thereof

A nano-powder, hydrothermal reaction technology, applied in nanotechnology, structural parts, chemical instruments and methods, etc., can solve the problems of harsh synthesis conditions of vanadium tetrasulfide, difficult to control reaction, slow research progress, etc. High purity and crystallinity, and uniform chemical composition
CN105923652AActive Publication Date: 2016-09-07SHAANXI UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHAANXI UNIV OF SCI & TECH
Publication Date
2016-09-07

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Abstract

The invention provides a multilevel-structured VS4 nano-powder, and a preparation method and an application thereof. According to the invention, a vanadium source solution and a sulfur source solution are mixed under stirring, wherein the molar ratio of vanadium to sulfur is controlled at 1:1-1:2, such that a mixed liquid is obtained; the mixed liquid is subjected to a hydrothermal reaction; when the reaction is finished, cooling, washing, collecting and drying are carried out, such that the multilevel-structured VS4 nano-powder is obtained. The process is simple and is easy to control. The prepared VS4 nano-powder has uniform chemical composition and relatively high purity. The nano-powder shows excellent electrochemical performance when used as a lithium / sodium ion battery electrode material. Also, the method overcomes a defect of high temperature of a traditional calcination method, and does not need large equipment and harsh reaction conditions. The raw materials are cheap and are easy to obtain; cost is low; yield is high; no post treatment is needed; and the method is environment-friendly. The method is suitable for large-scale production.
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Description

【Technical field】

[0001] The invention relates to a preparation method of a vanadium tetrasulfide nanometer material, in particular to a multilevel structure VS 4 Nanopowder and its preparation method and application. 【Background technique】

[0002] Lithium-ion batteries are widely used in the portable electronics market due to their advantages of high operating voltage, high capacity, low self-discharge and long cycle life. However, the global lithium resources will not be able to effectively meet the huge demand for power lithium-ion batteries [Tarascon J M, Armand M. Issues and challenges facing rechargeable lithium batteries [J]. Nature, 2001, 414(6861): 359-367]. Due to its rich resources, low cost, and environmental friendliness, sodium-ion batteries are considered to be an ideal choice to replace lithium-ion batteries as power sources for next-generation electric vehicles and supporting power sources for large-scale energy storage power stations. Therefore, high capa...

Claims

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