Aqueous Lithium鈥揑odine Solar Flow Battery for the Simultaneous Conversion and Storage of Solar Energy

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• 作者：Mingzhe Yu ; William D. McCulloch ; Damian R. Beauchamp ; Zhongjie Huang ; Xiaodi Ren ; Yiying Wu
• 刊名：Journal of the American Chemical Society
• 出版年：2015
• 出版时间：July 8, 2015
• 年：2015
• 卷：137
• 期：26
• 页码：8332-8335
• 全文大小：270K
• ISSN：1520-5126

文摘

Integrating both photoelectric-conversion and energy-storage functions into one device allows for the more efficient solar energy usage. Here we demonstrate the concept of an aqueous lithium鈥搃odine (Li鈥揑) solar flow battery (SFB) by incorporation of a built-in dye-sensitized TiO₂ photoelectrode in a Li鈥揑 redox flow battery via linkage of an I₃^{鈥?/sup>/I鈥?/sup> based catholyte, for the simultaneous conversion and storage of solar energy. During the photoassisted charging process, I鈥?/sup> ions are photoelectrochemically oxidized to I₃鈥?/sup>, harvesting solar energy and storing it as chemical energy. The Li鈥揑 SFB can be charged at a voltage of 2.90 V under 1 sun AM 1.5 illumination, which is lower than its discharging voltage of 3.30 V. The charging voltage reduction translates to energy savings of close to 20% compared to conventional Li鈥揑 batteries. This concept also serves as a guiding design that can be extended to other metal-redox flow battery systems.}