Multiple Regulation of Electrolyte with Trace Amounts of Sodium Dehydroacetate Additives Enables High‐Performance Aqueous Zinc‐Ion Batteries

Small, Journal Year: 2025, Volume and Issue: unknown

Published: March 26, 2025

Rechargeable aqueous zinc-ion batteries (AZIBs) draw much attention for low cost and high safety. However, hydrogen evolution reaction (HER) uneven Zn2+ deposition shorten lifespan, hampering commercial use. In this study, sodium dehydroacetate (SD) containing carbonyl keto-carbonyl is introduced as multifunctional electrolyte additives, which effectively modifies the solvent shell structure, achieving a transference number of up to 0.72. Acting bond acceptor, SD disrupts water network thereby increasing HER overpotential by 22 mV corrosion potential 9 mV. The polar functional groups in can reversibly capture H⁺ ions dynamically neutralize OH⁻ ions, maintaining interfacial pH balance on zinc anode suppressing HER. Notably, not only alters electrolyte's kinetic but also induces uniform along (002) plane, inhibiting dendrite growth minimizing side reactions. This phenomenon demonstrated both symmetric full-cell configurations. Zn//Zn cell achieves an ultra-long cycling lifespan 2800 hours at 5 mA cm⁻2, Zn//VO2 full battery maintains capacity retention rate 73.09% after 2000 cycles with average coulombic efficiency 99.98%, underscoring effectiveness additive enhancing performance.

Language: Английский

Modulating Ion Behavior by Functional Nanodiamond Modified Separator for High-Rate Durable Aqueous Zinc-Ion Battery

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 9, 2024

Aqueous zinc-ion batteries (AZIBs) have garnered widespread attention due to their promising development and application prospects. However, progress of AZIBs has been hindered by zinc (Zn) dendrites side reactions at the electrode-electrolyte interface (EEI). In particular, large uneven pores commercial glass fiber (GF) separators lead nonuniform Zn

Language: Английский