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Lithium‐Metal Anodes Working at 60 mA cm −2 and 60 mAh cm −2 through Nanoscale Lithium‐Ion Adsorbing
Author(s) -
Ye Lei,
Liao Meng,
Cheng Xiangran,
Zhou Xufeng,
Zhao Yang,
Yang Yibei,
Tang Chengqiang,
Sun Hao,
Gao Yue,
Wang Bingjie,
Peng Huisheng
Publication year - 2021
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202106047
Subject(s) - anode , overlayer , electrolyte , lithium (medication) , materials science , stripping (fiber) , battery (electricity) , current density , ion , metal , chemical engineering , graphene , cathode , nanotechnology , chemistry , electrode , composite material , metallurgy , medicine , power (physics) , physics , organic chemistry , quantum mechanics , engineering , endocrinology
Achieving high‐current‐density and high‐area‐capacity operation of Li metal anodes offers promising opportunities for high‐performing next‐generation batteries. However, high‐rate Li deposition suffers from undesired Li‐ion depletion especially at the electrolyte‐anode interface, which compromises achievable capacity and lifetime. Here, electronegative graphene quantum dots are synthesized and assembled into an ultra‐thin overlayer capable of efficient Li‐ion adsorbing at the nanoscale on Li‐metal to fully relieve Li‐ion depletion. The protected Li anode achieves long‐term reversible Li plating/stripping over 1000 h at both superior current density of 60 mA cm −2 and areal capacity of 60 mAh cm −2 . Implementation of the protected anode allows for the construction of Li‐air full battery with both enhanced rate capability and cycling performance.