%A ZHAO Wenwen, WANG Yunfang, DUAN Donghong, LIU Shibin, ZHOU Xianxian, CHEN Liang
%T Application of Layered Co3O4 /C Derived from Metal-organic Framework in Lithium-sulfur Batteries
%0 Journal Article
%D 2022
%J Materials Reports
%R 10.11896/cldb.20120257
%P 20120257-7
%V 36
%N 6
%U {http://www.mater-rep.com/CN/abstract/article_4766.shtml}
%8 2022-03-25
%X Cobalt tetroxide/carbon composite nanoparticles were synthesized by a method of oxidizing layer-shaped MOF-71 precursor primary carbonization. By virtue of the polar advantage of cobalt tetroxide, the prepared nanoparticles can have a strong affinity for lithium polysulfide and inhibit the shuttle effect. Through physical characterization and electrochemical test of the material, it is found that the oxidation temperature has a greater impact on the shape of the Co3O4/C structure and the particle size of the Co3O4/C material prepared by high temperature oxidation is about 50 nm, the average pore size of which is 17.44 nm. Multi-layered reticular structure is conducive to improving battery capacity and stability. Discharge specific capacity of lithium sulfur batteries assembled with Co3O4/C as positive matrix loaded with sulfur is 1 142.2 mAh·g-1 in the first cycle at a discharge rate of 0.2C. After cycled 300 times at the current density of 0.5C, the Coulombic efficiency remains above 98%, lithium sulfur batteries exhibiting excellent electrochemical performance.