Material for lithium-sulfur battery positive electrode and preparation method thereof

A lithium-sulfur battery and positive electrode technology, applied in the field of lithium-sulfur battery positive electrode materials and its preparation, can solve the problems of reducing the electrochemical performance of composite materials, the inability to synthesize composite materials with high efficiency, and reducing the tap density, so as to improve Coulombic efficiency and cycle stability, good cycle stability and Coulombic efficiency, the effect of reducing volume expansion
CN111477874APending Publication Date: 2020-07-31INT ACAD OF OPTOELECTRONICS AT ZHAOQING SOUTH CHINA NORMAL UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
INT ACAD OF OPTOELECTRONICS AT ZHAOQING SOUTH CHINA NORMAL UNIV
Publication Date
2020-07-31

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Abstract

The invention belongs to the technical field of lithium-sulfur batteries, and particularly relates to a material for a lithium-sulfur battery positive electrode and a preparation method of the material. The material is a self-supporting mesoporous vanadium nitride nanowire / carbon nanotube composite material with a three-dimensional network structure. According to the material, the vanadium nitridenanowire with the mesoporous structure is connected with the carbon nanotube to form the self-supporting three-dimensional network structure; the material has high conductivity, ultrahigh specific surface area and excellent mechanical properties; and the method is simple, effective and easy to operate.
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Description

technical field

[0001] The invention belongs to the technical field of lithium-sulfur batteries, and in particular relates to a material for the positive electrode of lithium-sulfur batteries and a preparation method thereof. Background technique

[0002] In the high-tech era, the demand for high-energy storage devices is increasing. Lithium-sulfur batteries are known for their extremely high theoretical energy density (2500Wh·kg -1 ) become one of the most promising rechargeable batteries. Lithium-sulfur battery is a battery system with metallic lithium as the negative electrode and elemental sulfur as the positive electrode. The sulfur positive electrode usually chooses an appropriate mixing ratio of active materials, conductive agents and binders; at the same time, due to the natural abundance of sulfur, low cost and environmental The advantages such as friendliness have made lithium-sulfur batteries arouse great interest in the academic circle in recent years.

[0003] ...

Claims

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