Sponge-like porous carbon/tin composite anode materials for lithium ion batteries
نویسندگان
چکیده
A novel sponge-like porous C/Sn composite is synthesized by dispersing SnO2 nanoparticles into a softtemplate polymer matrix followed by carbonization. The mesoporous C/Sn anodes can deliver a capacity as high as 1300mAh g 1 after 450 charge/discharge cycles, and provide a capacity of 180mAh g 1 even at 4000 mA g 1 charge/discharge current density. An extra reversible capacity over the theoretical value of the porous C/Sn anode is observed, which is attributed to the reversible formation/ decomposition of the gel-like polymers formed on the mesoporous C/Sn composite due to the catalytic effect of the Sn nanoparticles. The high capacity, long cycle life, high power, 100% Coulombic efficiency, and inexpensive production method make the sponge-like porous C/Sn composite an attractive anode material in Li-ion batteries for electric vehicles and renewable energy storage.
منابع مشابه
Electrochemical Performance of Porous Carbon/Tin Composite Anodes for SodiumIon and LithiumIon Batteries
The electrochemical performance of mesoporous carbon (C)/tin (Sn) anodes in Na-ion and Li-ion batteries is systematically investigated. The mesoporous C/Sn anodes in a Na-ion battery shows similar cycling stability but lower capacity and poorer rate capability than that in a Li-ion battery. The desodiation potentials of Sn anodes are approximately 0.21 V lower than delithiation potentials. The ...
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State Key Laboratory of Silicon Materials, K Application for Batteries of Zhejiang Provin Engineering, Zhejiang University, Hangzhou edu.cn; Fax: +86 571 87951152; Tel: +86 57 Department of Chemical and Biomolecula College Park, MD 20742, USA. E-mail: cswa † Electronic supplementary information (TGA) prole of the SnO2@C porous com porous composite aer being ultrasoni galvanostatic charge–disc...
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