阳极
集电器
锂(药物)
材料科学
电流(流体)
离子
纳米纤维
碳纳米纤维
碳纤维
化学工程
复合材料
化学
电极
有机化学
碳纳米管
电气工程
电解质
物理化学
工程类
复合数
内分泌学
医学
作者
Si-Jin Kim,Min‐Cheol Kim,Sang-Beom Han,Gyu-Ho Lee,Hui-Seon Choe,Sangook Moon,Da-Hee Kwak,Seonki Hong,Kyung-Won Park
标识
DOI:10.1016/j.jiec.2017.01.014
摘要
To increase the energy storage capacity of Li-ion batteries (LIBs), novel anode materials having excellent electrochemical properties need to be intensively studied. In particular, although Si as an anode active material has a high theoretical capacity compared to graphite, Si has exhibited irreversible cycle properties due to its volumetric expansion during the charge/discharge process. In this study, a 3-D paper-type Si-carbon nanofiber-composite electrode (Si/CNF-P) as a binder/current collector-free anode for LIBs was prepared using an electrospinning method. The Si/CNF-P exhibited a high initial capacity of 1957 mAh g−1 at 2 A g−1 and maintained 1187 mAh g−1 (retention rate of 60.6%) for 400 cycles. The enhanced performance of Si/CNF-P as an anode without a current collector and a binder in LIBs can be mainly attributed to the voids produced by cross-linked CNFs as a matrix and the electrochemical reaction of Si NPs on the CNFs without additional collapse of the electrode.
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