氟化石墨嵌锂和嵌钠行为的第一性原理研究

工程(英文) ›› 2015, Vol. 1 ›› Issue (2) : 243-246.

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工程(英文) ›› 2015, Vol. 1 ›› Issue (2) : 243-246. DOI: 10.15302/J-ENG-2015039
研究论文
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氟化石墨嵌锂和嵌钠行为的第一性原理研究

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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 (CFx) 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.

Keywords

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

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. . 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.
基金
笔者感谢国家高技术研究发展计划 (2015AA034201) 、国家自然科学基金 (11234013,11264014) 、江西省自然科学基金(20133ACB21010,20142BAB212002,20132BAB212005)以及江西教育委员会基金 (GJJ14254,KJLD14024) 对本研究提供的支持。()
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