The reconversion reaction of lithium fluoride (LiF)/iron (Fe) nanocomposite thin film cathodes prepared with the codeposition method was investigated at room temperature. The LiF:Fe in molar ratio of 1:1 composite thin film was able to be discharged with large capacity of 300mAhg?1 after the reconversion reaction on the first charge at 25°C. After the 2nd cycle, it showed relatively stable reversible capacity more than 200mAhg?1. The discharge profile with 2V plateau was similar to that of ferrous fluoride (FeF2), and the trace of FeF2 was detected in the fully-charged LiF/Fe nanocomposite thin film by X-ray photoelectron spectroscopy (XPS). These results suggest that the reconversion reaction from LiF/Fe to FeF2 proceeded successfully on the first charge as we expected.
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