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

Hou, Xu LU orcid ; Pollard, Travis P. ; He, Xin ; Du, Leilei ; Ju, Xiaokang ; Zhao, Wenguang ; Li, Meirong ; Wang, Jun ; Paillard, Elie and Lin, Hai LU , et al. (2022) In Advanced Energy Materials 12(23).
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.... (More)

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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publishing date
type
Contribution to journal
publication status
published
keywords
aqueous lithium-ion batteries, quasi-solid-state electrolytes, water-in-eutectogel
in
Advanced Energy Materials
volume
12
issue
23
article number
2200401
publisher
Wiley-Blackwell
external identifiers
  • scopus:85129383005
ISSN
1614-6832
DOI
10.1002/aenm.202200401
language
English
LU publication?
no
additional info
Publisher Copyright: © 2022 The Authors. Advanced Energy Materials published by Wiley-VCH GmbH.
id
f6f97e29-8226-49e1-8daa-622cf8155f27
date added to LUP
2025-12-05 22:34:00
date last changed
2025-12-11 14:43:54
@article{f6f97e29-8226-49e1-8daa-622cf8155f27,
  abstract     = {{<p>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<sub>2</sub>O<sub>4</sub>||Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub> 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.</p>}},
  author       = {{Hou, Xu and Pollard, Travis P. and He, Xin and Du, Leilei and Ju, Xiaokang and Zhao, Wenguang and Li, Meirong and Wang, Jun and Paillard, Elie and Lin, Hai and Sun, Jingyu and Xu, Kang and Borodin, Oleg and Winter, Martin and Li, Jie}},
  issn         = {{1614-6832}},
  keywords     = {{aqueous lithium-ion batteries; quasi-solid-state electrolytes; water-in-eutectogel}},
  language     = {{eng}},
  month        = {{06}},
  number       = {{23}},
  publisher    = {{Wiley-Blackwell}},
  series       = {{Advanced Energy Materials}},
  title        = {{“Water-in-Eutectogel” Electrolytes for Quasi-Solid-State Aqueous Lithium-Ion Batteries}},
  url          = {{http://dx.doi.org/10.1002/aenm.202200401}},
  doi          = {{10.1002/aenm.202200401}},
  volume       = {{12}},
  year         = {{2022}},
}