Metal-organic framework-derived CoSe_(2)@N-doped carbon nanocubes for high-performance lithium-ion capacitors  

作　　者：Lei Wang Xiong Zhang Yan-Yan Kong Chen Li Ya-Bin An Xian-Zhong Sun Kai Wang Yan-Wei Ma 

机构地区：[1]Institute of Electrical Engineering,Chinese Academy of Sciences,Beijing 100190,China [2]School of Engineering Sciences,University of Chinese Academy of Sciences,Beijing 100190,China [3]Institute of Electrical Engineering and Advanced Electromagnetic Drive Technology,Qilu Zhongke,Jinan 250013,China [4]School of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,China

出　　处：《Rare Metals》2024年第5期2150-2160,共11页稀有金属（英文版）

摘　　要：Cobalt selenide(CoSe_(2))has garnered considerable attention as a prospective anode candidate for advanced lithium-ion storage,prompting comprehensive investigations.However,CoSe_(2)-based anodes usually suffer from significant volume variation upon lithiation leading to unsatisfactory cycling stability.Herein,a versatile synthesis route is proposed for the in-situ fabrication of CoSe2nanoparticles embedded in N-dope carbon skeleton(CoSe_(2)@NC)through annealing treatment and selenization of a metal–organic framework-derived(MOF)precursor.The N-doped carbon derived from the MOF serves not only as an excellent conductive substrate but also as a confined reactor,effectively inhibiting the structural instability and alleviating the inevitable volume change of CoSe_(2).Owing to their unique nanostructure,the as-prepared CoSe_(2)@NC exhibits a high capacity of 745.9mAh·g^(-1)at 0.1 A·g^(-1),while maintaining excellent rate capability and an impressive lifespan.Furthermore,the assembled lithium-ion capacitor(LIC)based on CoSe_(2)@NC demonstrates an energy density of 130Wh·kg^(-1),a power density of 24.6 kW·kg^(-1),and remarkable capacity retention of 90.8%after 8000 cycles.These results highlight the great potential of CoSe_(2)@NC for practical applications.

关 键 词：Lithium capacitors Cobalt selenide Metal-organic frameworks N-doped carbon 

分 类 号：TM53[电气工程—电器] TB383.1[一般工业技术—材料科学与工程]