Non-concentrated aqueous electrolytes with organic solvent additives for stable zinc batteries.

ABSTRACT: Rechargeable aqueous zinc batteries (RAZBs) are promising for large-scale energy storage because of their superiority in addressing cost and safety concerns. However, their practical realization is hampered by issues including dendrite growth, poor reversibility and low coulombic efficiency (CE) of Zn anodes due to parasitic reactions. Here, we report a non-concentrated aqueous electrolyte composed of 2 m zinc trifluoromethanesulfonate (Zn(OTf)₂) and the organic dimethyl carbonate (DMC) additive to stabilize the Zn electrochemistry. Unlike the case in conventional aqueous electrolytes featuring typical Zn[H₂O]₆ ²⁺ solvation, a solvation sheath of Zn²⁺ with the co-participation of the DMC solvent and OTf^- anion is found in th

SUBMITTER: Dong Y 

PROVIDER: S-EPMC8179661 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature