阳极
材料科学
复合数
法拉第效率
锂(药物)
溅射沉积
电导率
化学工程
电极
复合材料
溅射
纳米技术
化学
薄膜
医学
工程类
内分泌学
物理化学
作者
Junying Zhang,Zhi‐Ling Hou,Xiaoming Zhang,Chuanbo Li
标识
DOI:10.1016/j.ijhydene.2021.11.080
摘要
In this study, [email protected] composite anode material is prepared by magnetron sputtering method and applied for lithium-ion batteries. The Cu component with higher intrinsic conductivity can help to improve the conductivity of the Si particles effectively. The irregularly shaped micro-sized Si particles have reduced agglomeration effect compared with nano-sized particles. In order to further relieve the volume effect of the Si particles during charging and discharging processes, carbon layer is further introduced, which will further boost the conductivity and the cyclic performance. The [email protected]@C composite electrode exhibits a remarkably improved electrochemical performance with reversible capacity of 1130 mAhg−1 after 100 cycles with coulombic efficiency of 99.3%. The methods used for the preparation of the [email protected] and [email protected]@C composite materials are both mass-productive, which is benefit for their practical applications. Moreover, magnetron sputtering method used for composite power preparation has broad application prospects in micro-sized composite material preparation.
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