Kilogram-scale Fabrication of Si/C Bean-structured Materials as Stable Anode for Li-ion Storage
The practical application of Si-based materials has long been impeded by the high-cost,low yield and poor electrochemical performance.Here,inspired by the compact cladding and close connection structure of the bean,we design an efficient buffering bean-structured material of Si/C framework as stable anode for Li-ion storage.By a simple ball-milling process,the kilogram-scale production can be realized.The Si/C composites could exhibit the excellent enhancement of electrochemical performance with a large storage capacity(1162.2 mAh g-1 at 0.1C and 601.6 mAh g-1 at 0.2C)and superior cycling stability(527 mAh g-1 after 80 cycles).The superior electrochemical performance is the result from the unique bean-structure of the Si/C composites: the porous carbon with some micropores provide void space which accommodate the huge volume expansion upon Li insertion/extraction process,and also act as a conductive matrix to enhance the conductivity,short transportation length for both Li+and electrons.
Li-ion battery Si/C composites Anode Ball milling
Liu Yang Du Yu Yang Yijun Lam Tran Dai Wang Xi
Key Laboratory of Luminescence and Optical Information,Ministry of Education,School of Science,Beiji State Key Laboratory of Multi-Phase Complex Systems,Institute of Process Engineering,Chinese Academy Graduate University of Science and Technology,Vietnam Academy of Science and Technology,18 Hoang Quo
国际会议
北京
英文
2095-2102
2018-09-16（万方平台首次上网日期，不代表论文的发表时间）