First-Principles Study of Lithium and Sodium Atoms Intercalation in Fluorinated Graphite

Fengya Rao; Zhiqiang Wang; Bo Xu; Liquan Chen; Chuying Ouyang

doi:10.15302/J-ENG-2015039

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Engineering ›› 2015, Vol. 1 ›› Issue (2) : 243-246. DOI: 10.15302/J-ENG-2015039

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First-Principles Study of Lithium and Sodium Atoms Intercalation in Fluorinated Graphite

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Abstract

The structure evolution of fluorinated graphite (CF_x) upon the Li/Na intercalation has been studied by first-principles calculations. The Li/Na adsorption on single CF layer and intercalated into bulk CF have been calculated. The better cycling performance of Na intercalation into the CF cathode, comparing to that of Li intercalation, is attributed to the different strength and characteristics of the Li-F and Na-F interactions. The interactions between Li and F are stronger and more localized than those between Na and F. The strong and localized Coulomb attraction between Li and F atoms breaks the C−F bonds and pulls the F atoms away, and graphene sheets are formed upon Li intercalation.

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first-principles / Li/Na rechargeable batteries / fluorinated graphite

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Fengya Rao, Zhiqiang Wang, Bo Xu, Liquan Chen, Chuying Ouyang. First-Principles Study of Lithium and Sodium Atoms Intercalation in Fluorinated Graphite. Engineering, 2015, 1(2): 243‒246 https://doi.org/10.15302/J-ENG-2015039

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Acknowledgements

Thanks to the support of National High Technology Research and Development Program of China (“863” Program) (2015AA034201), the National Natural Science Foundation of China (11234013 and 11264014), Natural Science Foundation of Jiangxi Province (20133ACB21010, 20142BAB212002, and 20132BAB212005), and Foundation of Jiangxi Education Committee (GJJ14254 and KJLD14024).

Compliance with ethics guidelines

Fengya Rao, Zhiqiang Wang, Bo Xu, Liquan Chen, and Chuying Ouyang declare that they have no conflict of interest or financial conflicts to disclose.

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