A Stable Vanadium Redox‐Flow Battery with High Energy Density for Large‐Scale Energy Storage

作者：Liyu Li, Soowhan Kim, Wei Wang, M. Vijayakumar, Zimin Nie, Baowei Chen, Jianlu Zhang, Guanguang Gordon Xia, Jian Zhi Hu, Gordon L. Graff, Jun Liu, Zhenguo Gary Yang · 发表于：Advanced Energy Materials · 年份：2011 · DOI：10.1002/aenm.201100008 · 被引用次数：871 · 研究领域：Advanced battery technologies research、Supercapacitor Materials and Fabrication、Advanced Battery Technologies Research

Abstract The all‐vanadium redox flow battery is a promising technology for large‐scale renewable and grid energy storage, but is limited by the low energy density and poor stability of the vanadium electrolyte solutions. A new vanadium redox flow battery with a significant improvement over the current technology is reported in this paper. This battery uses sulfate‐chloride mixed electrolytes, which are capable of dissolving 2.5 M vanadium, representing about a 70% increase in energy capacity over the current sulfate system. More importantly, the new electrolyte remains stable over a wide temperature range of −5 to 50 °C, potentially eliminating the need for electrolyte temperature control in practical applications. This development would lead to a significant reduction in the cost of energy storage, thus accelerating its market penetration.