材料科学
法拉第效率
亚氧化物
锂(药物)
硅
阳极
碳纤维
化学工程
纳米技术
复合材料
电极
冶金
物理化学
复合数
内分泌学
化学
工程类
医学
作者
Hao Tian,Huajun Tian,Wu Yang,Fan Zhang,Wang Yang,Qiaobao Zhang,Yong Wang,Jian Liu,S. Ravi P. Silva,Hao Líu,Guoxiu Wang
标识
DOI:10.1002/adfm.202101796
摘要
Abstract Silicon has been regarded as an attractive high‐capacity anode material for next‐generation lithium‐ion batteries (LIBs). However, Si anodes suffer from huge volume variation during cycling, which poses a critical challenge for stable battery operation. Compared with Si, Si suboxide (SiO x ) is one of the most promising candidates for high‐energy‐density LIBs because of its alleviated swelling and highly stable cycling performance. Whereas, the poor electronic conductivity and low (initial) Coulombic efficiency of SiO x anodes severely hinder practical applications for LIBs. Herein, for the first time, these issues are successfully solved through rationally designing hollow‐structured SiO x @carbon nanotubes (CNTs)/C architectures with graphitic carbon coatings and in situ growth of CNTs. When applied as anodes in LIBs, the SiO x @CNTs/C anodes exhibit high reversible capacity, high initial Coulombic efficiency (88%), outstanding cycling performance, and extraordinary mechanical strength during the calendaring process (200 MPa). This work paves the way for developing SiO x ‐based anode materials for high‐energy‐density LIBs.
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