A high energy density solar rechargeable redox battery

An integrated solar energy conversion and storage system is presented using a dye sensitized electrode in a redox battery structure. A stable discharge voltage is shown with high areal energy storage capacity of 180 µW h cm−2 by choosing iodide/polysulfide as the pair of active materials matched with permeable porous electrodes. The solar rechargeable battery system offers a higher round-trip efficiency and potential cost savings on fabrication compared to individual devices.

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