Aluminum Iodide Primary Battery and Dye Sensitized Solar Cell Developed Successfully

More recently, Meng Qingbo, a researcher in the Institute of Physics and Devices of the Chinese Academy of Sciences and a deputy researcher of Li Yu, collaborated with Professor Fu Zhengdan of Fudan University to apply aluminum iodide electrolytes to primary batteries and dye-sensitized solar cells and achieved good results. . They found that aluminum iodine contact can form a new type of primary battery - aluminum iodine battery. Using their monoiodo-ion solid electrolytes, the working principle of this aluminum-iodine battery is based on iodide ion conduction. Common Al-based batteries and Li/I2 batteries are based on cation-based transport, which was discovered by the previous battery system based solely on anion transport. Due to the slow diffusion of Al ions on the surface film, the Al-based battery has the disadvantage of low activity of the Al electrode. The conventional lithium-ion battery has a smaller discharge current. The new iodide-based solid electrolyte based aluminum iodine battery has a high discharge rate, and has the advantages of low cost and environmental friendliness. This study has a good inspiration for the development of other anion-conducting battery systems. The electrolyte in the dye-sensitized solar cell generally uses a water-sensitive substance such as LiI, so the requirement of anhydrous conditions increases the cost of battery manufacturing. In addition, the nitrile organic solvent used in the electrolyte is a toxic solvent. If used for a long time, these solvents will have adverse effects on the environment and human health, which is not conducive to the promotion and application of such solar cells. Based on their original work, using ethanol as a solvent, in the atmospheric environment, aluminum iodide electrolyte was prepared by in-situ reaction of aluminum and iodine in solution, which was directly applied to dye-sensitized solar cells. 5.9% high photoelectric conversion efficiency. The novel aluminum iodide electrolyte has four advantages: low cost, easy preparation, excellent performance and environmental friendliness. It opens up new ways for the research of electrolytes for dye-sensitized solar cells.
Research and development of electrochemical energy storage and conversion devices, including primary batteries, secondary batteries, supercapacitors, dye-sensitized solar cells, and fuel cells, have important implications for alleviating energy and environmental crises and improving human living standards. Environmentally friendly, low cost, safe and efficient electrolytes play an important role in promoting the practical application of electrochemical energy storage and energy conversion devices. The above results have applied for three national invention patents, and related articles were published in the recently published J. Am. Chem. Soc. (128, 8720-8721, 2006) journal. This work was supported by the "863" plan and the "100-person plan" of the Chinese Academy of Sciences.

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