Tailoring the Solvation of Aqueous Zinc Electrolytes by Balancing Kosmotropic and Chaotropic Ions.

ABSTRACT: Aqueous zinc (Zn) batteries (AZBs) have emerged as a highly promising concept for grid-scale electrochemical energy storage due to the prospects of high safety, low cost, and competitive energy density. However, the commonly employed electrolytes, at ca. 0.5-2 M salt concentration, significantly limit the cycling stability due to the uncontrolled hydrogen evolution reaction (HER). This originates from the plentiful access of free water molecules that become hydrolyzed. As a remedy, highly concentrated electrolytes, ca. 10 m and higher, have been suggested by means of altering the local solvation, promoting Zn²⁺-anion rather than Zn²⁺-H₂O coordination, but this renders high viscosity electrolytes with reduced ion transport. Here, by balancing a combination o

SUBMITTER: Al Kathemi I 

PROVIDER: S-EPMC11841044 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature