Science· 2015Q1
“Water-in-salt” electrolyte enables high-voltage aqueous lithium-ion chemistries
- 3,716citations
- Q1SCImago
- 2015year
Short summary
A highly concentrated aqueous electrolyte expands the electrochemical stability window to ~3.0 volts, enabling a 2.3-volt aqueous lithium-ion battery that cycles over 1000 times with high efficiency.
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Key points
- Developed a highly concentrated aqueous electrolyte with an expanded electrochemical stability window of ~3.0 volts.
- Demonstrated a full lithium-ion battery operating at 2.3 volts using this aqueous electrolyte.
- The battery achieved over 1000 cycles with nearly 100% coulombic efficiency.
- High performance was maintained at both low (0.15 C) and high (4.5 C) charge/discharge rates.
AI-generated from the title and abstract; the full text is not read.
Abstract
Lithium-ion batteries raise safety, environmental, and cost concerns, which mostly arise from their nonaqueous electrolytes. The use of aqueous alternatives is limited by their narrow electrochemical stability window (1.23 volts), which sets an intrinsic limit on the practical voltage and energy output. We report a highly concentrated aqueous electrolyte whose window was expanded to ~3.0 volts with the formation of an electrode-electrolyte interphase. A full lithium-ion battery of 2.3 volts using such an aqueous electrolyte was demonstrated to cycle up to 1000 times, with nearly 100% coulombic efficiency at both low (0.15 coulomb) and high (4.5 coulombs) discharge and charge rates.
The authors' abstract, as published at the source. Science, 2015 · DOI ↗
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Field: Electrical and Electronic Engineering
Electrical and Electronic EngineeringEngineering