Zhang, Leiqian; Ge, Jiale; Wang, Tianlu; Guo, Hele; Chen, Suli; Miao, Yue-E; Debroye, Elke; ... Liu, Tianxi; + view all Zhang, Leiqian; Ge, Jiale; Wang, Tianlu; Guo, Hele; Chen, Suli; Miao, Yue-E; Debroye, Elke; He, Guanjie; Parkin, Ivan P; Hofkens, Johan; Lai, Feili; Liu, Tianxi; - view fewer (2024) Langmuir-Blodgett Film Formed by Amphiphilic Molecules for Facile and Rapid Construction of Zinc-Iodine Cell. Nano Letters 10.1021/acs.nanolett.3c04222. (In press).

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Abstract

Zinc-iodine batteries (ZIBs) are promising candidates for ecofriendly, safe, and low-cost energy storage systems, but polyiodide shuttling and the complex cathode fabrication procedures have severely hindered their broader commercial usage. Herein, a protocol is developed using phospholipid-like oleylamine molecules for scalable production of Langmuir-Blodgett films, which allows the facile preparation of ZIB cathodes in less than 1 min. The resulting inhomogeneous cathode allows for the continuous conversion of iodine. Moreover, the amine group of the oleylamine molecule at the cathode is capable of producing [OA*I+]I3- charge-transfer complexes with iodine, which facilitates the rapid migration of iodine and results in a highly reversible iodine conversion process. Consequently, the as-prepared ZIBs can deliver over 2000 cycles at 0.5 mA cm-2 with a capacity retention of 75.3%. This work presents a novel, straightforward, and efficient method for the rapid construction of ZIBs.

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