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Deep‐Eutectic‐Solvent‐Based Self‐Healing Polymer Electrolyte for Safe and Long‐Life Lithium‐Metal Batteries
Author(s) -
Jaumaux Pauline,
Liu Qi,
Zhou Dong,
Xu Xiaofu,
Wang Tianyi,
Wang Yizhou,
Kang Feiyu,
Li Baohua,
Wang Guoxiu
Publication year - 2020
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202001793
Subject(s) - electrolyte , materials science , chemical engineering , battery (electricity) , deep eutectic solvent , eutectic system , ethylene carbonate , ionic conductivity , electrochemistry , lithium (medication) , dissolution , polymer , inorganic chemistry , lithium battery , chemistry , organic chemistry , electrode , ionic bonding , metallurgy , microstructure , composite material , endocrinology , engineering , power (physics) , quantum mechanics , medicine , physics , ion
The deployment of high‐energy‐density lithium‐metal batteries has been greatly impeded by Li dendrite growth and safety concerns originating from flammable liquid electrolytes. Herein, we report a stable quasi‐solid‐state Li metal battery with a deep eutectic solvent (DES)‐based self‐healing polymer (DSP) electrolyte. This electrolyte was fabricated in a facile manner by in situ copolymerization of 2‐(3‐(6‐methyl‐4‐oxo‐1,4‐dihydropyrimidin‐2‐yl)ureido)ethyl methacrylate (UPyMA) and pentaerythritol tetraacrylate (PETEA) monomers in a DES‐based electrolyte containing fluoroethylene carbonate (FEC) as an additive. The well‐designed DSP electrolyte simultaneously possesses non‐flammability, high ionic conductivity and electrochemical stability, and dendrite‐free Li plating. When applied in Li metal batteries with a LiMn 2 O 4 cathode, the DSP electrolyte effectively suppressed manganese dissolution from the cathode and enabled high‐capacity and a long lifespan at room and elevated temperatures.