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Three-dimensional porous composite framework assembled withCuO microspheres as anode current collector for lithium-ionbatteries

查看全文 作　　者：HUANG [1]ShiMin;LUO [1]Jian;YUAN [1,2]Wei;ZHAO [2]BoTe;CHEN [2]Yu;TANG [1]Yong 高影响力作者 机构地区：[1]School of Mechanical and Automotive Engineering, South China University of Technology;[2]School of Materials Science and Engineering, Georgia Institute of Technology高影响力机构 出　　处：《Science China(Technological Sciences)》索引2019年第62卷第1期,共10页高影响力期刊 基　　金：supported by the National Natural Science Foundation of China(Grant Nos.51722504,51475172);the Natural Science Foundation of Guangdong Province(Grant No.2015A030306013);the Guangdong Science and Technology Plan Program(Grant Nos.2017A010104006,2017KZ010105);China Scholarship Fund(Grant No.201706155048) 摘　　要：The surface structure and material composition of current collectors have significant effects on the electrochemical performances of lithium-ion batteries(LIBs). In this work, a three-dimensional(3D) porous composite framework is applied as the anode current collector in LIBs. This unique 3D skeleton is composed of conductive carbon fiber/Cu core/shell fibrous structure. With an oxidation treatment upon the copper shell, the porous framework is assembled with CuO microspheres. Using mesocarbon microbead(MCMB) graphite powders as the active material, the cell with this 3D porous composite current collector shows an improved reversible discharge-charge capacity of 415 mAh g^(–1) at a current rate of 0.1 C after 50 cycles, which is much higher than that of the cell with a flat Cu foil(127 mAh g^(–1)). It is demonstrated that this unique fibrous network of the 3D current collector coupled with the morphological effects of the CuO microspheres greatly improve the cell performance in terms of electrical conductivity, reversible capacity and cycling stability. 关 键 词：LITHIUM-ION battery current COLLECTOR porous FRAMEWORK CuO MICROSPHERES carbon fiber
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