DataVXAdvanced Energy MaterialsPaper
journal article·2022-06Open access

“Water‐in‐Eutectogel” Electrolytes for Quasi‐Solid‐State Aqueous Lithium‐Ion Batteries

Xu Hou, Travis P Pollard, Xin He, Leilei Du, Xiaokang Ju, Wenguang Zhao, Meirong Li, Jun Wang, Elie Paillard, Hai Lin, Jingyu Sun, Kang Xu, Oleg Borodin, Martin Winter, Jie Li

Advanced Energy Materials· Volume 12· Issue 23
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Abstract

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. LiMn2O4||Li4Ti5O12 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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Research context

Energy storagePolymers

OpenAlex topics: Advanced Battery Materials and Technologies · Advancements in Battery Materials · Advanced battery technologies research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Helmholtz‐Institute Muenster (HI MS) IEK‐12 Forschungszentrum Juelich GmbH Corrensstr. 46 48149 Muenster Germany

Battery Science Branch Sensor and Electron Devices Directorate US Army Research Laboratory Adelphi MD 20783 USA

School of Chemical Engineering Sichuan University Chengdu 610065 P. R. China

MEET Battery Research Center Institute of Physical Chemistry University of Muenster Corrensstr. 46 48149 Muenster Germany

School of Advanced Materials Peking University Shenzhen Graduate School Shenzhen 518055 P. R. China

Academy for Advanced Interdisciplinary Studies Southern University of Science and Technology Shenzhen 518055 P. R. China

Department of Energy Politecnico di Milano Via Lambruschini, 4 Milano MI 20156 Italy

College of Energy Soochow Institute for Energy and Materials Innovations (SIEMIS) Jiangsu Provincial Key Laboratory for Advanced Carbon Materials and Wearable Energy Technologies Soochow University Suzhou 215006 P. R. China

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