Tunnel‐Oriented VO 2 (B) Cathode for High‐Rate Aqueous Zinc‐Ion Batteries

Abstract Tunnel‐type vanadium oxides are promising cathodes for aqueous zinc ion batteries. However, unlike layer‐type cathodes with adjustable layer distances, enhancing ion‐transport kinetics in tunnels characterized by fixed sizes poses a considerable challenge. This study highlights that the macroscopic arrangement of the electrode crucially determines tunnel orientation, thereby influencing ion transport. By changing the material morphology, the tunnel orientation can be optimized to facilitate rapid ion diffusion. In a proof‐of‐concept demonstration, it is revealed that (00 l ) facets‐dominated VO 2 (B) nanobelts with dispersive morphology (VO 2 ‐D) tend to adopt a stacking pattern with directional ion…

• NN
  National Natural Science Foundation of China

  Awards: 52102265, 22201135
• NS
  Natural Science Foundation of Jiangsu Province

  Awards: BK20210604, BK20230368