Mastering cathode and anode electrolyte interphases for vanadium-based zinc batteries via solvation structure control

• DOI: 10.1016/j.nanoen.2024.109822
• Publication Date: 2024-06-01T01:10:01Z
• Authors: Ziwei Zhao; Pengcheng Li; Ziwei Chai; Hao Zhang; Ge Li
• Keywords: Interphase

Metallic zinc-based anodes often encounter challenges such as dendrite growth, side reactions, and by-product generation, leading to diminished reversibility. This study introduces a novel approach by introducing methyl acetate cosolvent into an aqueous electrolyte based on Zn(OTf)2 through salting-in effect. Regulating the solvation sheath structure of Zn2+ enables formation cathode interphase anode interphase, enhancing stability vanadium-base zinc metal anode, respectively. The incorporation this allows for prolonged operation Zn//Cu half-cells over 1500 cycles with average columbic efficiency 99.82% under current density 1 mA cm-2. When are paired NaV3O8·1.5H2O cathodes, remarkable 80% capacity can be maintained after A/g. Furthermore, even conditions 6 mg cm-2 mass loading negative positive ratio 3, full battery demonstrates 77% retention 300 cycles. dual-interphase strategy provides valuable insights advancing vanadium-based batteries.