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1. (WO2018127166) POSITIVE ELECTRODE MATERIAL FOR LITHIUM-SULFUR BATTERY, PREPARATION METHOD THEREFOR, AND APPLICATIONS THEREOF

Pub. No.:    WO/2018/127166    International Application No.:    PCT/CN2018/071724
Publication Date: Fri Jul 13 01:59:59 CEST 2018 International Filing Date: Tue Jan 09 00:59:59 CET 2018
IPC: H01M 4/60
Applicants: CHI, Dun
迟钝
YAN, Junping
闫俊平
Inventors: CHI, Dun
迟钝
YAN, Junping
闫俊平
Title: POSITIVE ELECTRODE MATERIAL FOR LITHIUM-SULFUR BATTERY, PREPARATION METHOD THEREFOR, AND APPLICATIONS THEREOF
Abstract:
A positive electrode material for a lithium-sulfur battery comprises a sulfur-rich polymer and graphene. An internal structure of the sulfur-rich polymer is an interpenetrating network structure, the graphene is doped in the sulfur-rich polymer, the particle size of the sulfur-rich polymer is 100 meshes to 300 meshes; and 2 to 10 layers of flaky graphene are disposed. A preparation method for the positive electrode material comprises: crushing a prepared sulfur-rich polymer into powder, adding a solvent to obtain a solution, and sufficiently stirring the solution; carrying out ultrasonic dispersion on the graphene in the solvent to obtain a suspension; and mixing the two solutions, continuing to carry out ultrasonic dispersion and stirring, finally removing the solvent and drying a product, so as to obtain the positive electrode material for a lithium-sulfur battery. The positive electrode material for a lithium-sulfur battery has high conductivity, cycle performance and a long service life, and is simple to operate, low in cost and easy in large-scale manufacturing and commercialization.