阳极
石墨烯
材料科学
锂(药物)
电解质
纳米技术
复合数
电化学
碳纳米管
纳米颗粒
化学工程
电极
复合材料
化学
医学
工程类
内分泌学
物理化学
作者
Chen Xu,Jing Ye,Jian He,Keren Zhou,Yuanfu Chen,Qian Li,Jie Lin,Wanli Zhang
标识
DOI:10.1016/j.jallcom.2017.03.099
摘要
Self-assembled interwoven CoS2/carbon nanotubes (CNTs)/graphene (CCG) composite with hierarchical architecture is synthesized via a facile hydrothermal reaction. In the well-designed architecture of CCG, the one-dimensional CNTs and two-dimensional graphene nanosheets construct a highly conductive, porous and flexible network, which can not only effectively suppress the aggregation of CoS2 nanoparticles and increase the contact area between the composite anode and the electrolyte, but also offer sufficent channels for electron transfer and ionic diffusion and accommodate the volume expansion of the CoS2 during the charge/discharge process. Therefore, when CCG is used as anode for lithium-ion batteries, it exhibits much better electrochemical performance than that of bare CoS2: it delivers a high initial discharge capacity of 993 mAh g−1 at 100 mA g−1; it also demonstrates excellent rate performance with a high rate capacity of 212 mAh g−1 even under high current density of 2000 mA g−1. In this regard, it is promising for CCG to be used as a high-capacity anode for lithium-ion batteries.
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