Mott-Schottky Heterojunction Modulating Iron-Vanadium Oxide for High-Performance Aqueous Zinc Battery Cathodes.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 39803922.
- Also identified by DOI 10.1021/acs.nanolett.4c04752.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
Vanadium-based oxides have garnered significant attention for aqueous zinc batteries (AZBs), whereas sluggish Zn<sup>2+</sup> diffusion and structural collapse remain major challenges in achieving high-performance cathodes. Herein, different structures of iron-vanadium oxides were fabricated by modulating the amount of vanadium content. It is found that the porous Mott-Schottky heterojunction composed of Fe<sub>0.12</sub>V<sub>2</sub>O<sub>5</sub> and Fe<sub>2</sub>V<sub>4</sub>O<sub>13</sub> mixed phase was used to construct a self-generated FeVO-5 structure, which could lower the diffusion barrier and improve the electron transport derived from the formed built-in electric field at the interface, showing faster reaction kinetics and improved capacity compared with the singe-phase FeVO-1. Surprisingly, the FeVO-5 cathode delivers an impressive capacity of up to 431 mAh g<sup>-1</sup> at 0.6 A g<sup>-1</sup>, excellent rate capability (252.3 mAh g<sup>-1</sup>, 80 A g<sup>-1</sup>), and superior long-term cycling performance (95% capacity retention over 12 000 cycles at 40 A g<sup>-1</sup>). This work presents a reasonable strategy for engineering heterostructure materials for AZB application.