Unveiling the Reversibility and Stability Origin of the Aqueous V₂ O₅ -Zn Batteries with a ZnCl₂ "Water-in-Salt" Electrolyte.

ABSTRACT: Aqueous V₂ O₅ -Zn batteries, an alternative chemistry format that is inherently safer to operate than lithium-based batteries, illuminates the low-cost deployment of the stationary energy storage devices. However, the cathode structure collapse caused by H₂ O co-insertion in aqueous solution dramatically deteriorates the electrochemical performance and hampers the operation reliability of V₂ O₅ -Zn batteries. The real-time phase tracking and the density functional theory (DFT) calculation prove the high energy barrier that inhibits the Zn²⁺ diffusion into the bulk V₂ O₅ , instead the ZnCl₂ "water-in-salt electrolyte" (WiSE) can enable the dominant proton insertion with negligible lattice stra

SUBMITTER: Tang X 

PROVIDER: S-EPMC8655202 | biostudies-literature | 2021 Dec

REPOSITORIES: biostudies-literature