Co-HCS/CNT/S composite lithium-sulfur battery positive electrode material and preparation method thereof
A positive electrode material and composite material technology, which is applied in the field of Co-HCS/CNT/S composite lithium-sulfur battery positive electrode material and its preparation, can solve the problems of poor battery cycle life, poor rate performance, and low sulfur utilization rate, etc.
Pending Publication Date: 2021-05-11
QILU UNIV OF TECH
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Abstract
The invention relates to a Co-HCS/CNT/S composite lithium-sulfur battery positive electrode material and a preparation method thereof, hollow carbon nanospheres (HCS) are attached to hollow carbon nanotubes (CNT) in the positive electrode material, and HCS is doped with Co and S and is loaded on the surface of the composite material. The preparation method comprises the following steps: (1), preparing a precursor; (2), obtaining a SiO2@Co-HCS/CNT intermediate; (3), carrying out treatment to obtain Co-HCS/CNT; and (4), obtaining the Co-HCS/CNT/S composite lithium-sulfur battery positive electrode material. Co is used as a catalyst, the oxidation-oxidation reduction reaction of a polymer can be promoted and efficient chemical adsorption of polysulfide can be provided, the loading capacity of sulfur can be improved through the special structure of HCS/CNT, meanwhile, efficient transmission of lithium ions and electrons can be provided through the special hollow structure, and the utilization rate of sulfur is improved. Further, the oxidation-reduction reaction is accelerated.
Application Domain
Electrode thermal treatmentPositive electrodes +1
Technology Topic
Lithium–sulfur batteryPolymer +11
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