Regulating the solvation structure with N,N-dimethylacetamide co-solvent for high-performance zinc-ion batteries

Abstract

Benefiting from the strong coordination effect and localized hydrophobicity of DMA molecules, the optimized electrolyte comprising water and DMA has excellent long-term cycle life and stable capacity retention.

Water/N,N-Dimethylacetamide-Based Hybrid Electrolyte and Its Application to Enhanced Voltage Electrochemical Capacitors

“…That confirms the spectroscopic results and indicates changes in the solvation structure of sodium in the electrolyte mixture, i.e., demonstrates that the organic constituent participates in the Na + solvation shell, which can be explained by its higher donor number (27.8 kcal mol −1 vs. 18.0 for H 2 O). Similar findings were suggested for water/DMSO in the presence of sodium and zinc salts and very recently for water/DMAc/ZnSO 4 electrolyte of the Zn-ion battery [29,31,48].…”

Organohydrogel electrolytes with solvated structure regulation for highly reversible low-temperature zinc metal batteries

“…The highly active water in hydrated structures is prone to decomposing during the charging and discharging process, leading to side reactions including H 2 releasing, Zn corrosion, and the growth of Zn dendrites. 35–39 To address these issues, an organohydrogel electrolyte with a bisolvent of water and 1,3-dioxolane (BIS-D 0.6 , volume ratio of DOL : H 2 O = 6 : 4) as the dispersion medium is developed. The preferential solvation of DOL with Zn 2+ and strong DOL–H 2 O interaction both suppressed the HER and lowered the freezing point of water.…”

Solvation configuration and interfacial chemistry regulation via a bio-based Cyrene additive for highly reversible zinc anodes

“…14,15 Generally, the main functions of electrolyte additives in AZIBs can be categorized as (i) adsorption of additive molecules at the IHP of the Zn anode to regulate the interfacial charge distribution and guide the orientational deposition of Zn 2+ , 16,17 and (ii) reconstruction of the solvation structure of the Zn hydration layer to release solvated H 2 O molecules, thereby weakening H 2 O decomposition activity and restraining passivation byproduct generation. 18,19 Evidently, a desirable electrolyte additive should possess a synergetic regulation function of the solvation conguration and interfacial deposition behavior of Zn 2+ .…”