阳极
材料科学
石墨烯
电化学
纳米颗粒
锂离子电池
化学工程
锂(药物)
复合数
离子
电极
氧化物
纳米技术
复合材料
电池(电)
冶金
化学
物理化学
内分泌学
功率(物理)
有机化学
工程类
物理
医学
量子力学
作者
Xu Zhang,Lianfeng Duan,Xueyu Zhang,Xuesong Li,Wei Lü
标识
DOI:10.1016/j.jallcom.2019.152539
摘要
Cu2S has attracted great attention as anode material of lithium ion battery due to high theoretical capacity and good electron conductivity. However, the poor cyclic stability due to volume change during charging and discharging restrains its further application. Herein, to improve stability of Cu2S, 3D matrix composed of reduced graphene oxide (rGO) scaffold and Cu2S nanoflowers are synthesized by hydrothermal method and freeze-drying process. The 3D matrix structure could relieve the structural and morphological variation of nanoparticles during charge and discharge processes, and rGO as bridge increases the effective area that is simultaneously accessible to electrons and lithium ions to improve the specific capacity of Cu2S nanoflowers. Thus, excellent capacity, stable cycle life and preferable rate capability could be simultaneously realized. The 3D Cu2[email protected] composite electrodes show the specific capacity of 1630 mAh g−1 for the first cycle and a reversible capacity of 600 mAh g−1 after 200 cycles at 100 mAh g−1.
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