Carbon dots crosslinked gel polymer electrolytes for dendrite-free and long-cycle lithium metal batteries
作者机构：Department of ChemistryShanghai Key Laboratory of Molecular Catalysis and Innovative MaterialsFudan UniversityShanghaiChina Department of Materials ScienceFudan UniversityShanghaiChina
出 版 物：《SmartMat》 (智能材料（英文）)
年 卷 期：2022年第3卷第2期
页 面：323-336页
核心收录：
基 金：supported by the National Natural Science Foundation of China(Nos.21975048 and 21771039) the Shanghai Science and Technology Committee(No.19DZ2270100)
主 题：carbon dot crosslinking structure gel polymer electrolyte lithium metal battery solid electrolyte interface
摘 要：Lithium metal batteries(LMBs)with extremely high energy densities have several advantages among energy storage ***,the uncontrolled growth of dendrites and the flammable liquid electrolytes(LEs)often cause safety *** solid-state batteries seem to be the ultimate choice,but solvent-free electrolytes usually fail in terms of conductivity at room ***,gel polymer electrolytes(GPEs)with a simple manufacturing process and high ionic conductivity are considered as the most competitive candidates to resolve the present ***,we design a polymeric network structure via esterification and amidation reactions between polyethylene glycol(PEG)and carbon dots(CDs).After incorporation with polyvinylidene fluoride and some LEs,the as-prepared PEG-CDs composite electrolytes(PCCEs)show a high ionic conductivity of 5.5 mS/cm and an ion transference number of 0.71 at room temperature,as well as good flexibility and *** the PCCEs are assembled with lithium metal anodes and LiFePO4 or LiCoO2 cathodes,both the cycling stability and the retention rate of these LMBs show excellent performance at room temperature.
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