Jian Wang,Jing Zhang,Shuang Cheng,Jin Yang,Yonglan Xi,Xingang Hou,Qingbo Xiao,Hongzhen Lin
出处
期刊:Nano Letters [American Chemical Society] 日期:2021-03-16卷期号:21 (7): 3245-3253被引量:87
标识
DOI:10.1021/acs.nanolett.1c00534
摘要
Lithium metal electrodes have shown great promise for high capacity and the lowest potential. However, wide application is restricted by uncontrollable plating/stripping lithium behaviors, an uneven solid electrolyte interphase, and a lithium dendrite. Herein, the highly active single metal atom anchored in vacant catalyst is synthesized on the hierarchical porous nanocarbon (SACo/ADFS@HPSC). Acting as an artificial protective modulation layer on the lithium surface, the numerous atomic sites show the superiority in modulating lithium ion behaviors and smoothing the lithium surface without dendrite growth. As a consequence, the SACo/ADFS@HPSC-modified Li electrode lowers nucleation barrier (15 mV), extends the smooth plating lifespan (1600 h), and improves Coulombic efficiency, significantly accelerating the horizonal deposition of plated lithium. Coupled with a sulfur cathode, the fabricated pouch cell with 5.4 mg cm–2 delivers a high capacity of 3.78 mA h cm–2 corresponding to 1505 Wh kg–1, showing the promising practical application.