Work

S-doped VO2 induced oxygen vacancies for achieving high performance aqueous zinc ion batteries

Year: 2025

Type: article

Abstract: At present, vanadium-based materials are still the research hotspot of cathode materials for aqueous zinc ion batteries, and metal ion doping is a common mean of modification for vanadium-based materials. However, doping with metal ion has inevitable drawbacks because the cations reduce the oxidation state of vanadium ions, leading to a decrease in theoretical energy density. Hence, in this study, to avoid the reduction of the capacity performance of the cathode material due to metal ion doping, we construct S-doped VO 2 with oxygen vacancies through hydrothermal synthesis combined with high-temperature calcinations. Impressively, the S-VO 2 -300 cathode can achieve a high specific capacity of 520 mAh g −1 at a low current density of 0.1 A g −1 , also exhibited excellent rate performance while it can reach a specific capacity of 267.6 mAh g −1 at 5.0 A g −1 , and demonstrate outstanding cycling stability (85.4 % capacity retention after 2000 cycles at 3.0 A g −1 ).

Source: Chemical Engineering Journal

DOI: 10.1016/j.cej.2025.168680

Authors: Youye Dai, Di Li, Xianghua Kong, Chenguang Feng, Yuanxiang Gu

Institutions: Qingdao University of Science and Technology, Chongqing University

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: hybrid

Estimated APC paid: $4,830