近日，课题组硕士生张景瑞论文“Methyl-functionalized hydrangea-like vanadium pentoxide cathode for aqueous zinc ion batteries with high-rate and long-term cycling stability”被Journal of Alloys and Compounds（2021年中科院SCI期刊二区TOP期刊，IF=6.371）接收！

Vanadium Pentoxide (V₂O₅) is an appealing cathode candidate for Zinc-ion batteries (ZIBs) owing to its modifiable interlayer structure and changeable chemical redox states. However, the extensive practical application is deeply plagued by either poor rate capability or cycling stability performance. Herein, the methyl group decorated V₂O₅ with hydrangea-like morphology was successfully fabricated by a facile solvothermal method to solve the problem. Such a hydrangea-shaped architecture containing numerous nanosheets is advantageous for the rapid ions/electrons transfer. The extended interlayer distance stemmed from the pillar effect of the methyl-functionalized V₂O₅ contributes a comparatively steady and rapid Zn²⁺ intercalation/deintercalation. When applied in ZIBs, it delivers a superior rate capability (123 mA h g⁻¹ at 4.0 A g⁻¹) and an excellent long-life cycling (capacity retention of 112.7 % after 1000 cycles at 4.0 A g⁻¹). Electrochemical kinetics investigations of methyl-functionalized V₂O₅ microsphere show that the capacity is dominantly contributed from pseudocapacitance. As well, mechanism of zinc ion storage has been explored. Such a structural design of electrode materials can be exploited to promote extensive applications of ZIBs in future.

https://www.sciencedirect.com/science/article/pii/S092583882202401X#fig0040