Li2O-Reinforced Solid Electrolyte Interphase on Three-Dimensional Sponges for Dendrite-Free Lithium Deposition

Frontiers in Chemistry

Jingjing Yang¹  Huibo Yan²  Keyu Xie²  Jinlei Gu²  Chao Shen²  Yuliang Gao² 

[1] School of Materials and Chemical Engineering, Xi'an Technological University, Xi'an, China;State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene (NPU), Xi'an, China;

关键词: CuO@Cu;    submicron wire sponge;    current collector;    lithium anode;    dendrite-free;   

DOI  :  10.3389/fchem.2018.00517

来源: DOAJ

【 摘 要 】

Lithium (Li) metal, with ultra-high theoretical capacity and low electrochemical potential, is the ultimate anode for next-generation Li metal batteries. However, the undesirable Li dendrite growth usually results in severe safety hazards and low Coulombic efficiency. In this work, we design a three-dimensional CuO@Cu submicron wire sponge current collector with high mechanical strength SEI layer dominated by Li2O during electrochemical reaction process. The 3D CuO@Cu current collector realizes an enhanced CE of above 91% for an ultrahigh current of 10 mA cm−2 after 100 cycles, and yields decent cycle stability at 5 C for the full cell. The exceptional performances of CuO@Cu submicron wire sponge current collector hold promise for further development of the next-generation metal-based batteries.

【 授权许可】

Unknown