期刊
CHEMSUSCHEM
卷 14, 期 9, 页码 2076-2083出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.202100223
关键词
cooperative effects; energy conversion; V2O5; valence engineering; zinc-ion batteries
资金
- Shandong Natural Science foundation [ZR2020ME053, ZR2020QB027, ZR2019MEM005]
- Major Scientific and Technological Projects of CNPC [ZD2019-184-001]
- Fundamental Research Funds for the Central Universities [20CX06007A, 18CX02042A, 20CX05010A]
The study demonstrated the formation of carbon quantum dots induced vanadium pentoxide nanobelts for ZIBs, showing excellent Zn ion storage capacity and cycling performance.
Aqueous Zn-ion batteries (ZIBs) have acquired the researchers' curiosity owing to their harmlessness, cost effectiveness and high theoretical capacity of Zn anode. However, desirable cathode materials with high-capacity and high-rate are still scarce. In this work, the formation of carbon quantum dots induced vanadium pentoxide nanobelts was demonstrated via a facile one-step hydrothermal method for ZIBs. It exhibited an excellent Zn ion storage capacity of 460 mA h g(-1) at 0.1 A g(-1), superior rate capability and stable cycling performance (above 85 % capacity retention over 1500 cycles at 4 A g(-1)). The electrochemical kinetics and zinc ion storage mechanism were also considered. An efficient architecture-coupled valence engineering in the hybrid cathode was proposed to improve the electric conductivity, Zn ion diffusion rate, and cycling stability for ZIBs. This work may be a great motivation for further research on V2O5 or other vanadium-based materials for high-performance ZIBs.
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