Perspective - Electrolyte Design for Aqueous Batteries : From Ultra-High Concentration to Low Concentration ?

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Original languageEnglish
Article number030530
Journal / PublicationJournal of the Electrochemical Society
Issue number3
Online published17 Mar 2022
Publication statusPublished - Mar 2022
Externally publishedYes


High voltage aqueous Li-ion batteries have the potential for sustainable large-scale energy storage due to their intrinsic advantages of safety, low cost, as well as environmental friendliness. Water-in-salt electrolytes have significantly enhanced the energy density of aqueous Li-ion batteries by extending the aqueous electrolyte stability window to 3.0 V. However, the cathodic limit and salt concentration need to be reduced, enabling to operate low cost LiMn2O4/Li4Ti5O12 cells. In addition, gravimetric energy density of LiMn2O4/Li4Ti5O12, self-discharge rate, and operation temperature range remain rarely studied. This perspective aims to briefly summarize the opportunity and challenges of aqueous batteries for practical applications. © 2022 Electrochemical Society Inc.. All rights reserved.

Research Area(s)

  • Batteries - aqueous, Batteries - Li-ion, electrolyte, Interface modification