Tin nanoparticle-loaded porous carbon nanofiber composite anodes for high current lithium-ion batteries
Tin nanoparticle-loaded porous carbon nanofiber composite anodes for high current lithium-ion batteries
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DOI：
10.1016/j.jpowsour.2014.12.106
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发表时间：
2015-03-15
影响因子：
9.2
通讯作者：
Chen, Renzhong
中科院分区：
文献类型：
--
作者：
Shen, Zhen;Hu, Yi;Chen, Renzhong
金属锡是一种用于锂离子电池（LIBs）的有前景的高容量负极材料，但其在锂离子嵌入/脱出过程中巨大的体积变化通常会导致较差的循环稳定性。为了解决这个问题，我们展示了通过在N,N - 二甲基甲酰胺溶剂中对乙酸锡（II）/矿物油/聚丙烯腈前驱体进行静电纺丝，并随后在氩气气氛下于700℃碳化来制备负载锡纳米颗粒的多孔碳纳米纤维（Sn - PCNF）复合材料。结果表明，这使得纳米纤维表面的孔隙分布均匀，使得Sn - PCNF复合材料无需添加聚合物粘结剂或导电剂等非活性材料就可直接用作锂离子电池的负极。在0.8 A g⁻¹的高电流下经过200次循环后，放电容量达到约774 mA h g⁻¹，这种材料显然具有高倍率性能和优异的循环稳定性，并且由于其独特的结构和性能，是用作高电流可充电锂离子电池负极材料的极佳候选者。（C）2014爱思唯尔有限公司。保留所有权利。
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. (C) 2014 Elsevier B.V. All rights reserved.