Title:
PREPARATION METHOD FOR LITHIUM-SULFUR BATTERY POSITIVE ELECTRODE MATERIAL, AND POSITIVE ELECTRODE MATERIAL AND USE THEREOF
Document Type and Number:
WIPO Patent Application WO/2024/077665
Kind Code:
A1
Abstract:
The present invention belongs to the technical field of preparation of electrode materials, and disclosed are a preparation method for a lithium-sulfur battery positive electrode material, and a positive electrode material and the use thereof. The preparation method comprises: subjecting wood to delignification, pre-compression and activated pore-forming treatment to obtain a self-supporting carbon skeleton material having a hierarchical pore structure of micron pores and nano pores; and subjecting the self-supporting carbon skeleton material having the hierarchical pore structure of micron pores and nano pores to sulfur loading by using a solid phase method or a liquid phase method to obtain the lithium-sulfur battery positive electrode material. In the present invention, the density and pore structure of a wood-derived porous carbon skeleton are adjusted by using delignification, pre-compression and activated pore-forming methods. Nanopores are introduced into a micron-sized pipeline wall by means of activated pore forming, such that the dissolution and shuttling of lithium polysulfide are inhibited, and the cycling stability of a battery is improved; and the pre-compression treatment effectively controls the density of the carbon skeleton, improves the strength thereof, and improves the conductivity of a three-dimensional current collector under the condition of maintaining the pore structure, thereby being more beneficial to electron conduction.
Inventors:
GE ZHEN (CN)
LAI HAORAN (CN)
CHEN XI (CN)
LI JIYANG (CN)
WU MENGQIANG (CN)
LAI HAORAN (CN)
CHEN XI (CN)
LI JIYANG (CN)
WU MENGQIANG (CN)
Application Number:
PCT/CN2022/127600
Publication Date:
April 18, 2024
Filing Date:
October 26, 2022
Export Citation:
Assignee:
YANGTZE DELTA REGION INSTITUTE OF UNIV OF ELECTRONIC SCIENCE AND TECHNOLOGY OF CHINA HUZHOU (CN)
International Classes:
C01B32/318; H01M4/38
Attorney, Agent or Firm:
SCIHEAD IP LAW FIRM (CN)
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