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Long Cycle Life Lithium Metal Batteries Enabled with Upright Lithium Anode
Author(s) -
Chen Yuqing,
Yue Meng,
Liu Cuilian,
Zhang Hongzhang,
Yu Ying,
Li Xianfeng,
Zhang Huamin
Publication year - 2019
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.201806752
Subject(s) - anode , materials science , faraday efficiency , electrolyte , lithium (medication) , cathode , capacity loss , battery (electricity) , lithium metal , electrochemistry , chemical engineering , metal , electrode , metallurgy , thermodynamics , chemistry , medicine , power (physics) , physics , engineering , endocrinology
The lithium metal anode is the holy grail of the battery field due to its lowest reduction potential and high specific capacity; however, its application is hindered by severe safety hazards and inferior cyclic stability due to dendrites and unstable solid electrolyte interphase (SEI). Aiming at these problems, a coiled Li anode with a unique upright structure is proposed. The upright structure endows coiled Li anode with abundant inner reaction interface/space/mass for lithium deposit/storage/transport, which can induce the inner growth of Li dendrites and SEI. The Li + transport/deposit behavior and mechanism of coiled Li anode are clarified via in situ observation and numerical simulation. Benefiting from the small volume expansion and sufficient Li + transport, the coiled Li anodes combined with Li 4 Ti 5 O 12 cathodes achieve a long life of over 2000 cycles at 5C with a reversible capacity of 129 mAh g −1 and 100% Coulombic efficiency.