TY - JOUR
T1 - Horizontal Stress Release for Protuberance-Free Li Metal Anode
AU - Liu, Yuanming
AU - Yin, Xiaoguang
AU - Shen, Xin
AU - Zou, Peichao
AU - Qin, Xianying
AU - Yang, Cheng
AU - Zhang, Qiang
AU - Kang, Feiyu
AU - Chen, Guohua
AU - Li, Baohua
PY - 2020/9/17
Y1 - 2020/9/17
N2 - 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 LiFePO4 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.
AB - 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 LiFePO4 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.
KW - hemisphere-like concaves
KW - horizontal growth
KW - lithium metal batteries
KW - protuberance-free anodes
KW - stress release
UR - http://www.scopus.com/inward/record.url?scp=85088383734&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85088383734&origin=recordpage
U2 - 10.1002/adfm.202002522
DO - 10.1002/adfm.202002522
M3 - RGC 21 - Publication in refereed journal
SN - 1616-301X
VL - 30
JO - Advanced Functional Materials
JF - Advanced Functional Materials
IS - 38
M1 - 2002522
ER -
