电解质
材料科学
可燃性
电化学窗口
离子电导率
电化学
化学工程
电导率
电池(电)
纳米技术
无机化学
电极
复合材料
化学
物理化学
工程类
物理
功率(物理)
量子力学
作者
Xu Hou,Travis P. Pollard,Xin He,Leilei Du,Xiaokang Ju,Weiqian Zhao,Meirong Li,Jun Wang,Elie Paillard,Hai Lin,Jingyu Sun,Kang Xu,Oleg Borodin,Martin Winter,Jie Li
标识
DOI:10.1002/aenm.202200401
摘要
Abstract The development of high safety lithium‐ion batteries (LIBs) is greatly impeded by the flammability and leakage concerns of typical organic solvent‐based electrolytes. As one of the alternative classes of electrolytes, hydrogel electrolytes exhibit high safety, high flexibility, low cost, and are benign to the environment. However, the narrow electrochemical stability window (ESW) of typical hydrogel electrolytes restricts the operating voltage of battery cells. Here, a new class of “water‐in‐eutectogel (WiETG)” electrolyte is reported, fabricated by combining a hydrogel with a “deep eutectic solvent” (LiTFSI in acetamide). The obtained WiETG electrolyte exhibits non‐flammability, high ionic conductivity, and a wide ESW. LiMn 2 O 4 ||Li 4 Ti 5 O 12 cells with the WiETG electrolyte exhibit good cycling stability, high flexibility, and high safety. This newly developed WiETG electrolyte not only broadens the ESW of typical hydrogel electrolytes, but also opens a new perspective on future directions and guidance for the design of high safety electrolytes for flexible LIBs and beyond.
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