材料科学
成核
过电位
阳极
化学工程
集电器
纳米技术
枝晶(数学)
电极
复合材料
电化学
电解质
化学
几何学
数学
物理化学
工程类
有机化学
作者
Chen Chen,Jun Guan,Nianwu Li,Yue Lu,Deyan Luan,Cai Hong Zhang,Guang Cheng,Le Yu,Xiong Wen Lou
标识
DOI:10.1002/adma.202100608
摘要
Abstract The growth of lithium (Li) dendrites and the huge volume change are the critical issues for the practical applications of Li‐metal anodes. In this work, a spatial control strategy is proposed to address the above challenges using lotus‐root‐like Ni–Co hollow prisms@carbon fibers (NCH@CFs) as the host. The homogeneously distributed bimetallic Ni–Co particles on the N‐doped carbon fibers serve as nucleation sites to effectively reduce the overpotential for Li nucleation. Furthermore, the 3D conductive network can alter the electric field. More importantly, the hierarchical lotus‐root‐like hollow fibers provide sufficient void space to withstand the volume expansion during Li deposition. These structural features guide the uniform Li nucleation and non‐dendritic growth. As a result, the NCH@CFs host enables a very stable Li metal anode with a low voltage hysteresis during repeated Li plating/stripping for 1200 h at a current density of 1 mA cm −2 .
科研通智能强力驱动
Strongly Powered by AbleSci AI