In:
Angewandte Chemie, Wiley, Vol. 134, No. 44 ( 2022-11-02)
Abstract:
Designing water‐deficient solvation sheath of Zn 2+ by ligand substitution is a widely used strategy to protect Zn metal anode, yet the intrinsic tradeoff between Zn nucleation/dissolution kinetics and the side hydrogen evolution reaction (HER) remains a huge challenge. Herein, we find boric acid (BA) with moderate ligand field interaction can partially replace H 2 O molecules in the solvation sheath of Zn 2+ , forming a stable water‐deficient solvation sheath. It enables fast Zn nucleation/dissolution kinetics and substantially suppressed HER. Crucially, by systematically comparing the ligand field strength and solvation energies between BA and the ever‐reported electrolyte additives, we also find that the solvation energy has a strong correlation with Zn nucleation/dissolution kinetics and HER inhibition ability, displaying a classic volcano behavior. The modulation map could provide valuable insights for solvation sheath design of zinc batteries and beyond.
Type of Medium:
Online Resource
ISSN:
0044-8249
,
1521-3757
DOI:
10.1002/ange.v134.44
DOI:
10.1002/ange.202212780
Language:
English
Publisher:
Wiley
Publication Date:
2022
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