Affiliation:
1. Key Laboratory of Colloid and Interface Chemistry Shandong University Jinan 250100 P. R. China
2. Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources School of Chemical Engineering and Technology Hainan University Haikou 570228 P. R. China
Abstract
AbstractDespite their intrinsic safety and environmental friendliness, typical aqueous Zn‐ion rechargeable batteries have been struggling with poor reversibility and electrochemical stability. Hydrated eutectic electrolytes (HEEs) have been attracting extensive attention due to their appealing features of high designability and superior performances over typical aqueous electrolytes. However, an in‐depth understanding of unique microstructure in HEEs and the ensuing superior performances remains obscure, limiting the development of enhanced electrolytes. Herein, we demonstrate a distinct evolution path of Zn‐ion species from aqueous to superior hydrated eutectic electrolytes, which experience a special transition state enriched with H‐bonds between eutectic molecules. Complementary with the well‐studied reorganized solvation structure induced by short‐ranged salt‐solvent interaction, long‐range solvent‐solvent interactions arising from the H‐bond reorganizes the extended electrolyte microstructure, which in turn influences the cation diffusion mechanisms and interfacial reaction kinetics. Overall, we highlight the importance of ion species microstructural evolution in the rational design of superior aqueous electrolytes.
Funder
National Natural Science Foundation of China
Natural Science Foundation of Shandong Province
Ministry of Higher Education and Scientific Research
Subject
General Energy,General Materials Science,General Chemical Engineering,Environmental Chemistry
Cited by
10 articles.
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