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Cheap and Environmentally Benign Electrochemical Energy Storage and Conversion Devices Based on AlI3 Electrolytes

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journal contribution
posted on 12.07.2006, 00:00 by Bofei Xue, Zhengwen Fu, Hong Li, Xizhe Liu, Sunchao Cheng, Jia Yao, Dongmei Li, Liquan Chen, Qingbo Meng
Cheap and environmentally benign electrochemical energy conversion and storage devices, including a dye-sensitized solar cell (DSSC) using an AlI3−ethanol electrolyte and a new Al/I2 primary battery, are reported. The AlI3−ethanol electrolyte can be prepared simply by adding aluminum powder and iodine into ethanol at ambient conditions. The DSSC using this AlI3−ethanol electrolyte achieved an energy conversion efficiency of 5.9% at AM 1.5 (100 mW/cm-2). In the Al/I2 battery, AlI3 is formed spontaneously when aluminum and iodine electrodes are brought into contact at room temperature. Then I- anions transport across the AlI3 solid electrolyte for further electrochemical reactions.