Cited by 205Advanced Battery Materials and TechnologiesAdvanced battery technologies researchAdvancements in Battery Materials

Localized Water‐In‐Salt Electrolyte for Aqueous Lithium‐Ion Batteries

Jaumaux, Pauline, Yang, Xu, Zhang, Bao, Safaei, Javad, Tang, Xiao, Zhou, Dong, Wang, Chunsheng, Wang, Guoxiu·2021·Angewandte Chemie International Edition

Abstract

Water‐in‐salt (WIS) electrolytes using super‐concentrated organic lithium (Li) salts are of interest for aqueous Li‐ion batteries. However, the high salt cost, high viscosity, poor wettability, and environmental hazards remain a great challenge. Herein, we present a localized water‐in‐salt (LWIS) electrolyte based on low‐cost lithium nitrate (LiNO 3) salt and 1,5‐pentanediol (PD) as inert diluent. The addition of PD maintains the solvation structure of the WIS electrolyte, improves the electrolyte stability via hydrogen‐bonding interactions with water and NO 3− molecules, and reduces the total salt concentration. By in situ gelling the LWIS electrolyte with tetraethylene glycol diacrylate (TEGDA) monomer, the electrolyte stability window can be further expanded to 3.0 V. The as‐developed Mo 6 S 8|LWIS gel electrolyte|LiMn 2 O 4 (LMO) batteries delivered outstanding cycling performance with an average Coulombic efficiency of 98.53 % after 250 cycles at 1 C.

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Crossref · 10.1002/anie.202107389

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  • Wang's group developed localized water-in-salt electrolytes with low cost and high safety for aqueous lithium-ion batteries, using inexpensive and eco-friendly LiNO3 salt to replace toxic and costly Li salts, and lowered the electrolyte salt concentration by introducing diluents that dissolve water but not inorganic salts.

    “Therefore, Wang's group [87] developed localized water-in-salt electrolytes (LWiSEs) with low-cost and high safety for aqueous lithium-ion batteries, in which they used inexpensive and eco-friendly LiNO 3 salt to replace the toxic and costly Li salts, and lowered the electrolyte salt concentration by introducing diluents that dissolve the water but not the inorganic salts.”

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Authors
Jaumaux, P., Yang, X., Zhang, B., Safaei, J., Tang, X., Zhou, D., Wang, C., & Wang, G.
Affiliations
  • University of Technology Sydney (AU)
  • Huazhong University of Science and Technology (CN)
  • University of Maryland, College Park (US)
Corresponding author
  • Zhou, Dong
  • Wang, Chunsheng
  • Wang, Guoxiu
Venue
Angewandte Chemie International Edition
Publisher
Wiley
Published
2021-07-26
Volume
60
Issue
36
Pages
19965-19973
ISSN
  • 1433-7851 (ISSN-L)
  • 1521-3773
OpenAlex
W3175391148
Cited by
205
References
0
Citations by year
2026: 17 · 2025: 52 · 2024: 41 · 2023: 46 · 2022: 42 · 2021: 7
FWCI
10.00
Type
journal article
Language
en
Open access
closed
Locations
  • Angewandte Chemie International Edition (publishedVersion)
  • PubMed (publishedVersion)
Funders
Australian Research Council (DP200101249)
Topics
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Advanced Battery Materials and Technologies
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Advanced battery technologies research
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Advancements in Battery Materials
Keywords
water-in-salt electrolytes, aqueous lithium-ion batteries, lithium nitrate, 1,5-pentanediol, hydrogen bonding, electrochemical stability window, in situ gelation, gel electrolyte, LiMn2O4 cathode, cycling stability

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