A Stable Vanadium Redox-Flow Battery with High Energy Density for Large-Scale Energy Storage
✍ Scribed by Liyu Li; Soowhan Kim; Wei Wang; M. Vijayakumar; Zimin Nie; Baowei Chen; Jianlu Zhang; Guanguang Xia; Jianzhi Hu; Gordon Graff; Jun Liu; Zhenguo Yang
- Publisher
- John Wiley and Sons
- Year
- 2011
- Tongue
- English
- Weight
- 518 KB
- Volume
- 1
- Category
- Article
- ISSN
- 1614-6832
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✦ Synopsis
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.