期刊
ACS APPLIED MATERIALS & INTERFACES
卷 11, 期 9, 页码 8717-8724出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b00507
关键词
lithium metal anode; dendrite inhibition; lithium metal batteries; surface restraint dehalogenation reaction; organic-inorganic composite layer
资金
- National Natural Science Foundation of China [21771018, 21875004]
- Beijing University of Chemical Technology (BUCT, China) [buctrc201901]
- Program for Changjiang Scholars and Innovative Research Team in the University
- Fundamental Research Funds for the Central Universities
- Ministry of Finance
- Ministry of Education of PRC
Li metal is considered to be the most attractive anode for next-generation batteries because of its high specific capacity and low reduction potential. However, uncontrolled Li dendrite growth and low Coulombic efficiency cause severe capacity decay and safety issues. Here we propose a LiCl contained inorganic-organic hybrid layer on Li metal surface by a surface restraint dehalogenation reaction, which is highly uniform and features lithiophilic property as well as high ionic conductivity that can inhibit Li dendrite growth effectively. Consequently, the surface protected Li metal electrodes enable Li vertical bar Li symmetric cells to maintain a stable and low overpotential of 20 mV at a current density of 1 mA cm(-2) after cycling over 3000 h, and enable Li vertical bar LiFePO4 pouch cell to decay only 0.05% in capacity per cycle at 5.0 C for 500 cycles, indicating excellent cycle stability and high rate capability. This work offers a simple and facile method to protect Li metal anode and promise a potential direction for industrialization of Li metal batteries.
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