TY - JOUR
T1 - A dual lithiated alloy interphase layer for high-energy–density lithium metal batteries
AU - Ma, Chengwei
AU - Liu, Chengcai
AU - Zhang, Yuanxing
AU - Zhang, Xinyu
AU - Zhao, Zhikun
AU - Song, Tinglu
AU - Wu, Borong
AU - Mu, Daobin
N1 - Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2022/4/15
Y1 - 2022/4/15
N2 - Lithium metal batteries represent potential candidates for high-energy–density batteries. However, non-uniform Li deposition and dendrite growth limit the practical applications of Li anodes in solid-state and liquid-phase battery systems. This report investigates the conversion mechanism of an aluminum coordination compound (Al(MMP)3) at the interface of a lithium metal anode. Based on the proposed mechanism, a novel dual alloy comprising a LixAl-LixP hybrid interphase is designed to promote interfacial charge balance. Under the synergic effect of a fluoropolymer, the organic/inorganic protective layer containing the dual lithiated alloy exhibits short-term Li storage and rapid Li+ transport, thereby limiting the accumulation of inactive lithium and decreasing the Li+ migration barrier. Upon implementing the hybrid anode, the electrochemical life span of the Li metal battery exceeds 2000 h. Moreover, pairing with a Ni-rich cathode leads to excellent capacity retention and stable coulomb efficiency. The developed strategy can guide future advancements in lithium metal batteries with long cycle lives.
AB - Lithium metal batteries represent potential candidates for high-energy–density batteries. However, non-uniform Li deposition and dendrite growth limit the practical applications of Li anodes in solid-state and liquid-phase battery systems. This report investigates the conversion mechanism of an aluminum coordination compound (Al(MMP)3) at the interface of a lithium metal anode. Based on the proposed mechanism, a novel dual alloy comprising a LixAl-LixP hybrid interphase is designed to promote interfacial charge balance. Under the synergic effect of a fluoropolymer, the organic/inorganic protective layer containing the dual lithiated alloy exhibits short-term Li storage and rapid Li+ transport, thereby limiting the accumulation of inactive lithium and decreasing the Li+ migration barrier. Upon implementing the hybrid anode, the electrochemical life span of the Li metal battery exceeds 2000 h. Moreover, pairing with a Ni-rich cathode leads to excellent capacity retention and stable coulomb efficiency. The developed strategy can guide future advancements in lithium metal batteries with long cycle lives.
KW - Aluminum coordination compound
KW - Conversion mechanism
KW - Dual alloy
KW - Interfacial charge balance
KW - Lithium metal battery
UR - http://www.scopus.com/inward/record.url?scp=85122992108&partnerID=8YFLogxK
U2 - 10.1016/j.cej.2022.134637
DO - 10.1016/j.cej.2022.134637
M3 - Article
AN - SCOPUS:85122992108
SN - 1385-8947
VL - 434
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
M1 - 134637
ER -