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Horizontal Stress Release for Protuberance‐Free Li Metal Anode
Author(s) -
Liu Yuanming,
Yin Xiaoguang,
Shen Xin,
Zou Peichao,
Qin Xianying,
Yang Cheng,
Zhang Qiang,
Kang Feiyu,
Chen Guohua,
Li Baohua
Publication year - 2020
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.202002522
Subject(s) - faraday efficiency , materials science , anode , cathode , deposition (geology) , metal , electrochemistry , dendrite (mathematics) , chemical engineering , lithium (medication) , composite material , metallurgy , electrode , sediment , chemistry , medicine , paleontology , geometry , mathematics , endocrinology , biology , engineering
Dendrite‐induced short circuit and capacity loss present major barriers to high‐energy‐density lithium (Li) metal batteries. Many approaches have been proposed to regulate or restrain the formation of Li dendrite, yet it has not been fully eliminated. Herein, a dredging tactic with hemisphere‐like concaves is designed to horizontally release the stress during Li deposition, making both upper smooth Li and nether granular Li dwell inside the compartmented tummy. With such protuberance‐free Li metal anode, an ultrahigh Coulombic efficiency over 96% of the half‐cell is maintained after 490 cycles and capacity retention of 100% for the full cell paired with a LiFePO 4 cathode after 140 cycles (with low N/P ratio of ≈5) is achieved simultaneously. This study contributes to a deeper comprehension of electrochemical metal deposition and promotes the development of safe batteries.