Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: May 19, 2025

Developing high-performance cathode materials with enhanced stability and fast charge transport kinetics is crucial for advancing aqueous zinc-ion batteries (ZIBs). Herein, we introduce S-doped VO2 (S-VO2) as a material, leveraging sulfur incorporation to regulate the electronic structure, suppress vanadium dissolution, improve electrochemical performance. The introduction of not only induces oxygen vacancies, which enhance conductivity facilitate rapid electron transfer, but also strengthens V-O bond, effectively mitigating dissolution during cycling. As result, S-VO2 delivers high specific capacity 386.3 mA h g-1 at 0.1 A g-1, retains 79.6% its over 1600 cycles 2.0 exhibits outstanding long-term durability 80.3% retention after 6000 10.0 g-1. Ex situ XRD, in Raman, XPS analyses confirm highly reversible Zn2+ storage mechanism, while XANES EXAFS studies reveal that S doping stabilizes local coordination environment vanadium, reducing structural distortions enhancing cycling stability. This work highlights synergistic role defects optimizing materials, providing valuable insights design next-generation AZIBs superior performance reliability.

Language: Английский