Preparation method of cose2-decorated porous carbon cloth

By using CoSe2-modified porous carbon cloth as a carrier to load sulfur and metallic lithium in flexible lithium-sulfur batteries, the problems of polysulfide shuttle effect and lithium dendrite formation were solved, and a flexible lithium-sulfur battery with high energy density and long life was realized.

CN114914416BActive Publication Date: 2026-06-23NANJING UNIV OF POSTS & TELECOMM
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Patent Information

Application Number
CN202210519355.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-05-12
Publication Date
2026-06-23
Estimated Expiration
2042-05-12

AI Technical Summary

Technical Problem

Existing flexible lithium-sulfur batteries exhibit unstable performance under mechanical deformation, with severe polysulfide shuttle effect and lithium dendrite problems, making it difficult to achieve a balance between high energy density and long lifespan.

Method used

Using CoSe2-modified bifunctional porous carbon cloth as a carrier, sulfur and metallic lithium are loaded onto it through plasma chemical vapor deposition and electrodeposition techniques to form CC@CoSe2/S cathode and CC@CoSe2/Li anode materials, thereby optimizing the structure and performance of the battery module.

Benefits of technology

This technology achieves electrodes with high sulfur loading, high packing density, high sulfur utilization, and low nucleation barrier, thereby improving the electrochemical performance and mechanical flexibility of flexible lithium-sulfur batteries and extending battery life.

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Abstract

The application discloses a preparation method of a CoSe2 modified bifunctional porous carbon cloth, and the CC@CoSe2 obtained after cleaning, annealing and selenization is used as a carrier material. First, the CC@CoSe2 / S composite sulfur-containing positive electrode material is prepared by depositing sulfur on the CC@CoSe2 porous network in a plasma chemical vapor co-deposition manner. Second, the CC@CoSe2 is used as the carrier material, and the metal lithium is deposited on the CC@CoSe2 porous network in an electrodeposition manner, so that the CC@CoSe2 / Li composite metal lithium negative electrode material is prepared. Finally, the CC@CoSe2 / S composite sulfur-containing positive electrode material and the CC@CoSe2 / Li composite metal lithium negative electrode material prepared in the foregoing are used as the positive electrode and negative electrode materials of a lithium-sulfur battery, are applied to a flexible lithium-sulfur full battery, and are used for assembling a soft package battery to test electrochemical performance. The application achieves the synergy of high sulfur loading and high sulfur utilization, and constructs the lithium-sulfur full battery with high packing density, high sulfur surface loading and high energy density.
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