Electrochemical performance of KxVO2 nanosheets as cathode material for aqueous zinc-ion batteries.

Autor: Gao, Mingrui, Wang, Fei, Wei, Wei, Liang, Xiao, Cui, Shichuang, Sun, Shuokun, Dong, Jinxiu, Yin, Ziluo, Zhang, Yuqing, Zhu, Quanyao
Předmět:
Zdroj: Journal of Solid State Electrochemistry; Oct2023, Vol. 27 Issue 10, p2779-2786, 8p
Abstrakt: Due to the low cost and better security, aqueous zinc-ion batteries (AZIBs) are receiving a great deal of attention for large-scale energy storage. Vanadium-based materials have immense potential as AZIB cathode materials. Herein, the KxVO2 (KVO) cathode materials synthesized by the hydrothermal method. The morphology and structure of KVO were characterized by X-ray diffraction (XRD), Fourier infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM). FESEM demonstrated that sample displayed sheet morphology. The electrochemical performance of KVO electrode in aqueous zinc ion battery was determined by cyclic voltammetry and galvanostatic charge–discharge test after assembly of Zn-KVO button cell using 3 M ZnSO4 aqueous electrolyte. The Zn-KVO battery has a capacity of 435.8 mAh⋅g−1 at 0.2 A g−1. After 1000 cycles at 4 A g−1, the cycle reversible capacitance retention rate was 78% of the original capacity. Compared with V2O5 electrode, the capacity and cycle stability of KVO electrode have been significantly improved. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
načítá se...