@article{Qu2023, 
author = {Gan Qu and Kai Guo and Weijie Chen and Yu Du and Ye Wang and Bingbing Tian and Jianan Zhang},
title = {Cs-Induced Phase Transformation of Vanadium Oxide for High-Performance Zinc-Ion Batteries},
year = {2023},
journal = {Energy & Environmental Materials},
volume = {6},
number = {4},
keywords = {cathode materials, phase engineering, vanadium oxide, zinc-ion batteries},
url = {https://www.sciopen.com/article/10.1002/eem2.12502},
doi = {10.1002/eem2.12502},
abstract = {Rechargeable aqueous zinc-ion batteries are promising candidate for grid-scale energy storage. However, the development of zinc-ion batteries has been plagued by the lack of cathode materials with high specific capacity and superior lifespan. Herein, hexagonal Cs0.3V2O5 cathode is fabricated and investigated in zinc-ion batteries. Compared with the traditional vanadium oxides, the introduction of Cs changes the periodic atomic arrangements, which not only stabilizes the open framework structure but also facilitates the Zn2+ diffusion with a lower migration energy barrier. Consequently, high specific capacity of 543.8 mA h g−1 at 0.1 A g−1 is achieved, which surpasses most of reported cathode materials in zinc-ion batteries. The excellent cycle life is achieved over 1000 cycles with about 87.8% capacity retention at 2 A g−1. Furthermore, the morphological evolution and energy storage mechanisms are also revealed via a series of techniques. This work opens up a phase engineering strategy to fabricate the hexagonal vanadium oxide and elucidate the application of phase-dependent cathodes in zinc-ion batteries.}
}