Please use this identifier to cite or link to this item: http://hdl.handle.net/10497/24003
Title: 
Authors: 
Issue Date: 
2021
Citation: 
Li, Q., Ye, X., Jiang, Y., Ang, E. H., Liu, W., Feng, Y., Rui, X. & Yu, Y. (2021). Superior potassium and zinc storage in K-doped VO2(B) spheres. Materials Chemistry Frontiers, 7. https://doi.org/10.1039/D0QM00990C
Journal: 
Materials Chemistry Frontiers
Abstract: 
The abundant natural resources and low cost benefits of zinc-ion batteries (ZIBs) and potassium-ion batteries (KIBs) offer a better alternative to lithium-ion batteries (LIBs). Nevertheless, the large radius of K+ and high charge density of Zn2+ lead to sluggish electrochemical kinetics and the development of appropriate electrode materials for KIBs and ZIBs is therefore very important. Herein, hierarchical K-doped brookite vanadium dioxide (K–VO2(B)) spheres prepared via a simple microwave-assisted hydrothermal approach are proposed. K–VO2(B) as an anode material for PIBs shows enhanced electrochemical performance in terms of high capacity (∼420 mA h g−1), exceptional rate capability and long-term cycling performance (500 cycles). For ZIBs, it also achieves a high capacity of 350 mA h g−1 at 500 mA g−1 and 122 mA h g−1 at an extremely high rate of 50 A g−1. The outstanding PIB and ZIB performance of the K–VO2(B) is mainly benefitted from the improved ion diffusion coefficients after K-doping and the occurrence of inherently stable (de)intercalation reactions.
URI: 
ISSN: 
2052-1537 (online)
DOI: 
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