Work

Synergistic Enhancement of Intragrain Kinetics and Interfacial Stability in Cr‐Doped VO 2 @Carbon Cathode Enabling Advanced Aqueous Zinc‐Metal Batteries

Year: 2025

Type: article

Abstract: VO 2 has gained attention as a promising cathode material owing to its favorable ion diffusion pathways and abundant valence states. However, its performance is hindered by sluggish kinetics from zinc ions, high charge density, and vanadium dissolution induced by reactive water. Herein, Cr, ion doping is utilized to modulate the local electronic structure, enhancing zinc‐ion diffusion. Additionally, a carbon‐coating strategy is applied to reduce vanadium dissolution from excessive water‐VO 2 contact. This dual‐modification approach enables VO 2 to achieve exceptional rate capability and capacity retention, demonstrating 70% capacity retention after 1000 cycles at 3 A g −1 . Moreover, Zn 2+ diffusion in VO 2 after the Cr‐doping and carbon‐coating is significantly improved compared to pure VO 2 . These findings offer new insights into optimizing metal‐ion battery cathode materials.

Source: Batteries & Supercaps

DOI: 10.1002/batt.202500333

Authors: Peixi Li, Huihan Yang, Wenwei Zhang, Shijie Dong, Ping Luo, Qinyou An

Institutions: Hubei University of Technology, Wuhan Polytechnic University, Wuhan University of Technology, State Key Laboratory of Advanced Technology For Materials Synthesis and Processing

Language: English

Topic: Advanced battery technologies research

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: bronze

Funder: Natural Science Foundation of Hubei Province