Summary:

The present invention belongs to the technical field of lithium-sulfur battery electrode material, and more specifically, relates to a lithium-sulfur battery composite cathode material, its preparation and application. The mixed carbon-sulfur material was compounded with polymer by electrospinning to form a sulfur carrier material with a three-dimensional conductive fiber structure, and then the cathode material was formed by heat treatment with sulfur carrier. The unique 3D fiber nanostructure of the cathode material can not only provide a fast electron ion transport channel, but also effectively alleviate the volume expansion and polysulfide dissolution and shuttle effects faced by traditional lithium-sulfur batteries. The fiber structure cathode material synthesized by electrospinning and heat treatment by electrospinning and heat treatment of the present invention shows better long-cycle stability and high-rate performance than the lithium-sulfur battery cathode material prepared by the prior art, greatly improves the sulfur utilization rate, and solves the problem of poor cycle stability of the traditional sulfur cathode material.

Link: http://epub.cnipa.gov.cn/patent/CN114725333A