Affiliation:
1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 P. R. China
2. Hubei Longzhong Laboratory Wuhan University of Technology (Xiangyang Demonstration Zone) Xiangyang Hubei 441000 P. R. China
3. Hainan Institute Wuhan University of Technology Sanya 572000 P. R. China
Abstract
AbstractLithium metal is considered as a promising anode for its high energy density and low redox potential. However, dendrite growth and electrolyte‐lithium reaction lead to poor cycling stability of lithium anodes. Herein, a space‐confined strategy is proposed to realize stable Li metal anode by constructing a nonplanar interface with flexible tent‐like nanocavities. The tent‐like interface is achieved through the self‐assembly of graphene oxide on zinc nanosheets, accompanied by the spontaneous formation of ZnOC bond. Remarkably, the ZnOC bond immobilizes the graphene oxide layer to ensure tent‐like structural integrity, and shows excellent lithophilicity to induce homogeneous lithium deposition within nanocavities. Furthermore, the process of Li plating/stripping is confined inside tent‐like nanocavities to effectively decrease electrolyte content contact with fresh Li, which reduces hazardous electrolyte‐lithium reaction and thus eliminates continuous consumption of Li metal. Consequently, the symmetrical cells with the tent‐like interface deliver excellent long cycling performance over 1600 h at 1 mA cm−2, and full batteries show high‐capacity retention of 94.6% after 3000 cycles at 5 C. This strategy provides a unique flexible tent‐like interface to achieve stable lithium metal anode.
Funder
National Natural Science Foundation of China
National Key Research and Development Program of China
Subject
Electrochemistry,Condensed Matter Physics,Biomaterials,Electronic, Optical and Magnetic Materials
Cited by
14 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献