A Stable Vanadium Redox‐Flow Battery with High Energy Density for Large‐Scale Energy Storage |
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Authors: | Liyu Li Soowhan Kim Wei Wang M Vijayakumar Zimin Nie Baowei Chen Jianlu Zhang Guanguang Xia Jianzhi Hu Gordon Graff Jun Liu Zhenguo Yang |
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Institution: | Pacific Northwest National Laboratory, 902 Battelle Blvd, P.O. Box 999, Richland, WA 99354, USA |
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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. |
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Keywords: | batteries redox flow battery vanadium energy storage |
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