Recyclable cobalt-molybdenum bimetallic carbide modified separator boosts the polysulfide adsorption-catalysis of lithium sulfur battery

作     者：Ze Zhang Jia-Nan Wang A-Hu Shao Dong-Gen Xiong Jian-Wei Liu Cheng-Yen Lao Kai Xi Shi-Yao Lu Qiu Jiang Ji Yu Huang-Long Li Zhen-Yu Yang R.Vasant Kumar 张泽;王嘉楠;邵啊虎;熊冬根;刘建伟;劳成琰;郗凯;芦世瑶;江秋;吁霁;李黄龙;杨震宇;R.Vasant Kumar

作者机构：School of ChemistryNanchang UniversityNanchang 330031China Department of Materials Science and MetalliclurgyUniversity of CambridgeCambridge CB30FSUK Department of Environmental Science and EngineeringDepartment of Applied ChemistrySchool of ScienceKey Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter(Ministry of Education)State Key Laboratory for Electrical Insulation and Power EquipmentXi’an Jiaotong UnivrsityXi’an 710049China Department of EngineeringUniversity of CambridgeCB30FA CambridgeUK Department of ChemistryCity University of Hong KongTat Chee AvenueKowloonHong KongChina Department of Precision InstrumentTsinghua UniversityBeijing 10084China 

出 版 物：《Science China Materials》 (中国科学（材料科学（英文版）)

年 卷 期：2020年第63卷第12期

页      面：2443-2455页

核心收录：

学科分类：0808[工学-电气工程] 07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China(21863006,51662029,61974082 and 61704096) Youth Science Foundation of Jiangxi Province(20192BAB216001) Key Laboratory of Jiangxi Province for Environment and Energy Catalysis(20181BCD40004) 

主　　题：lithium-sulfur batteries bimetallic carbides electrocatalysts polysulfide adsorption-catalysis modified separators 

摘      要：The polysulfide shuttling and sluggish redox kinetics,due to the notorious adsorption-catalysis underperformance,are the ultimate obstacles of the practical application of lithium-sulfur(Li-S)*** carbon-based and transition metal compound-based material solutions generally suffer from poor catalysis and adsorption,respectively,despite the performance gain in terms of the ***,we have enhanced polysulfide adsorptioncatalytic capability and protected the Li anode using a complementary bimetallic carbide electrocatalyst,Co3 Mo3 C,modified commercial *** this demonstration,the potentials of bimetal compounds,which have been well recognized in other environmental catalysis,are also extended to Li-S *** with this modified separator,a simple cathode(S/Super P composite)can deliver high sulfur utilization,high rate performance,and excellent cycle stability with a low capacity decay rate of^0.034%per cycle at 1 C up to1000 *** at a high S-loading of 8.0 mg cm^-2 with electrolyte/sulfur ratio=6 m L g^-1,the cathode still exhibits high areal capacity of^6.8 m A h cm^-*** experimental analysis and the first-principles calculations proved that the bimetallic carbide Co3 Mo3 C provides more binding sites for adsorbing polysulfides and catalyzing the multiphase conversion of sulfur/polysulfide/sulfide than monometallic carbide Mo2 ***,the modified separator can be reutilized with comparable electrochemical *** also showed other bimetallic carbides with similar catalytic effects on Li-S batteries and this material family has great promise indifferent energy electrocatalytic systems.