Does Water‐in‐Salt Electrolyte Subdue Issues of Zn Batteries?
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Abstract
Abstract Zn‐metal batteries (ZnBs) are safe and sustainable because of their operability in aqueous electrolytes, abundance of Zn, and recyclability. However, the thermodynamic instability of Zn metal in aqueous electrolytes is a major bottleneck for its commercialization. As such, Zn deposition (Zn 2+ → Zn(s)) is continuously accompanied by the hydrogen evolution reaction (HER) (2H + → H 2 ) and dendritic growth that further accentuate the HER. Consequently, the local pH around the Zn electrode increases and promotes the formation of inactive and/or poorly conductive Zn passivation species (Zn + 2H 2 O → Zn(OH) 2 + H 2 ) on the Zn. This aggravates the consumption of Zn and electrolyte and degrades the…
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3Topics & keywords
Topics
Keywords
- Materials science
- Electrolyte
- Salt (chemistry)
- Inorganic chemistry
- Nanotechnology
- Electrode
- Organic chemistry
- Chemistry
UN Sustainable Development Goals
- Responsible consumption and production
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