Tin nanoparticle-loaded porous carbon nanofiber composite anodes for high current lithium-ion batteries

作者：Shen Zhen; Hu Yi^*; Chen Yanli; Zhang Xiangwu; Wang Kehao; Chen Renzhong

来源：Journal of Power Sources, 2015, 278: 660-667.

DOI：10.1016/j.jpowsour.2014.12.106

• Sn(II) acetate
• Electrospinning
• Porous carbon nanofibers
• Lithium-ion battery

Metallic Sn is a promising high-capacity anode material for use in lithium-ion batteries (LIBs), but its huge volume variation during lithium ion insertion/extraction typically results in poor cycling stability. To address this, we demonstrate the fabrication of Sn nanoparticle-loaded porous carbon nanofiber (Sn-PCNF) composites via the electrospinning of Sn(II) acetate/mineral oil/polyacrylonitrile precursors in N,N-dimethylformamide solvent and their subsequent carbonization at 700 degrees C under an argon atmosphere. This is shown to result in an even distribution of pores on the surface of the nanofibers, allowing the Sn-PCNF composite to be used directly as an anode in lithium-ion batteries without the need to add non-active materials such as polymer binders or electrical conductors. With a discharge capacity of around 774 mA h g(-1) achieved at a high current of 0.8 A g(-1) over 200 cycles, this material clearly has a high rate capability and excellent cyclic stability, and thanks to its unique structure and properties, is an excellent candidate for use as an anode material in high-current rechargeable lithium-ion batteries.

• 出版日期2015-3-15
• 单位浙江理工大学