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High energy primary lithium battery using oxidized sub-fluorinated graphite fluorides
Journal of Fluorine Chemistry ( IF 1.7 ) Pub Date : 2019-09-08 , DOI: 10.1016/j.jfluchem.2019.109369
M. Mar , M. Dubois , K. Guérin , N. Batisse , B. Simon , P. Bernard

Different graphite oxyfluorides were synthesized via Hummer's oxidation of sub-fluorinated graphites in order to maintain sp2 carbon atoms available for the oxidation, C–F bonds being non-reactive. In comparison with the graphite fluoride precursors, significant improvement of the energy density in primary lithium battery is achieved when the graphite oxyfluorides are used as cathode. When the Hummer's oxidation was carried out on graphite fluoride with both CF0.60 composition and a homogenous dispersion of non-fluorinated regions into fluorinated lattice, oxidation focused on the remaining sp2 carbon atoms and decomposed them. Defected graphite fluorides were then synthesized. The highest ever measured energy density in primary lithium battery with fluorinated carbons as cathode, i.e. 2825 Wh.Kg−1, was reached with this particular sample. Solid state NMR allowed the functional groups C–F, COC, COH, COOH and sp2 C to be quantified in graphite oxyfluorides and fluorides and their role in electrochemical processes to be highlighted.



中文翻译:

使用氧化亚氟化石墨氟化物的高能一次锂电池

通过Hummer对亚氟化石墨的氧化合成了不同的氟氧化石墨,以保持sp 2的碳原子可用于氧化,而C-F键是非反应性的。与氟化石墨前体相比,当使用氟氧化石墨作为阴极时,锂一次电池的能量密度得到了显着改善。当在CF 0.60组成且非氟化区域均匀分散到氟化晶格中的氟化石墨上进行悍马氧化时,氧化集中在剩余的sp 2上。碳原子分解。然后合成偏转的氟化石墨。该特定样品达到了以氟化碳为阴极的一次锂电池中测量到的最高能量密度,即2825 Wh.Kg -1。固态NMR可以定量分析氟氧化石墨和氟化物中的官能团CF,COC,COH,COOH和sp 2 C,并突出显示它们在电化学过程中的作用。

更新日期:2019-09-08
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