Preparation and Electrochemical Performance of SiOx/C/CNTs Composite Anode for Lithium Ion Batteries
LI Wenchao1,2, TANG Renheng2, WANG Ying2, WANG Huakun1, XIAO Fangming2, HUANG Ling2
1 School of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093; 2 Guangdong Province Key Laboratory of Rare Earth Development and Application, Guangdong Research Institute of Rare Metals, Guangzhou 510650
Abstract: A SiOx/C/CNTs composite anode for lithium ion batteries has been prepared via mechanical milling, spray drying and pyrolysis. The phase composition, morphology and electrochemical performance of the composites were detected by X-ray diffractometer (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM),energy disperse spectroscopy (EDS) and constant current charge-discharge test, and comparing the performance with SiOx/C and SiOx/C/graphene composition materials. The test results revealed that the introduction of CNTs can not only increase the reversible specific capacity of composites, but also improved its cyclic stability efficiently. The initial discharge capacity of SiOx/C/CNTs composition anode materials is 1 981.5 mAh/g at the current density of 100 mA/g, the discharge capacity remains at 474.0 mAh/g after 100 cycles, with excellent rate performance and good application prospect.
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2018, Vol. 32 
