Improved electrochemical performance for vanadium flow battery by optimizing the concentration of the electrolyte
By Minghua Jing and Zengfu Wei and Wei Su and Hongxiang He and Xinzhuang Fan and Ye Qin and Jianguo Liu and Chuanwei Yan
Published in Journal of Power Sources
2016
Abstract
In order to improve the utilization rate of the electrolyte and further reduce the energy storage cost, the physicochemical properties, electrochemical characteristics and charge/discharging behaviors of \VFB\ with different concentration of \VOSO4\ and \H2SO4\ were investigated systematically. The physicochemical characterizations show that the viscosity increases with the increasing concentration of \VOSO4\ and H2SO4, and the conductivity increases with the increasing concentration of \H2SO4\ while decreases with the increasing concentration of VOSO4. Both \CV\ and \EIS\ results demonstrate that the electrolyte with 1.6