Deep Eutectic Solvent-Based Self-Healing Polymer Electrolyte for Safe and Long-Life Lithium Metal Batteries.

Deep Eutectic Solvent-Based Self-Healing Polymer Electrolyte for Safe and Long-Life Lithium Metal Batteries.
Angew Chem Int Ed Engl. 2020 Feb 26;:
Authors: Jaumaux P, Liu Q, Zhou D, Xu X, Wang T, Wang Y, Kang F, Li B, Wang G
Abstract
The deployment of high-energy-density lithium (Li) metal batteries has been greatly impeded by the Li dendrite growth and the safety concerns originating from flammable liquid electrolytes. Herein, we report a stable quasi-solid-state Li metal battery employing a deep eutectic solvent (DES)-based self-healing polymer (DSP) electrolyte. This electrolyte was facilely fabricated via in situ copolymerizing (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) 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 LiMn 2 O 4 cathode, the DSP electrolyte effectively suppresses manganese dissolution from the cathode, and enables high capacity and long lifespan at room and elevated temperatures.
PMID: 32103602 [PubMed - as supplied by publisher]

Source: Angewandte Chemie - February 25, 2020 Category: Chemistry Authors: Jaumaux P, Liu Q, Zhou D, Xu X, Wang T, Wang Y, Kang F, Li B, Wang G Tags: Angew Chem Int Ed Engl Source Type: research