法拉第效率
过电位
材料科学
阳极
成核
电解质
集电器
电镀(地质)
锂(药物)
化学工程
剥离(纤维)
电流密度
电化学
金属
电极
复合材料
冶金
热力学
物理化学
内分泌学
化学
工程类
地质学
物理
医学
量子力学
地球物理学
作者
Shuilin Wu,Zhenyu Zhang,Minhuan Lan,Shaoran Yang,Junye Cheng,Junjie Cai,Jianhua Shen,Ying Zhu,Kaili Zhang,Wenjun Zhang
标识
DOI:10.1002/adma.201705830
摘要
Metallic lithium (Li) is a promising anode material for next-generation rechargeable batteries. However, the dendrite growth of Li and repeated formation of solid electrolyte interface during Li plating and stripping result in low Coulombic efficiency, internal short circuits, and capacity decay, hampering its practical application. In the development of stable Li metal anode, the current collector is recognized as a critical component to regulate Li plating. In this work, a lithiophilic Cu-CuO-Ni hybrid structure is synthesized as a current collector for Li metal anodes. The low overpotential of CuO for Li nucleation and the uniform Li+ ion flux induced by the formation of Cu nanowire arrays enable effective suppression of the growth of Li dendrites. Moreover, the surface Cu layer can act as a protective layer to enhance structural durability of the hybrid structure in long-term running. As a result, the Cu-CuO-Ni hybrid structure achieves a Coulombic efficiency above 95% for more than 250 cycles at a current density of 1 mA cm-2 and 580 h (290 cycles) stable repeated Li plating and stripping in a symmetric cell.
科研通智能强力驱动
Strongly Powered by AbleSci AI