Electrochemical Lithium Ion Doping and Undoping Behavior of Carbyne-like Carbon Film Electrode

Abstract

Carbyne is one of the allotropes of sp-carbon with a one-dimensional chain, but its physicochemical properties have not yet been clarified. We produced a carbyne-like carbon (carbon containing sp bond) electrode by electrochemical reduction in an organic electrolyte (1.0 mol dm−3 LiClO4/propylene carbonate) using a poly(tetrafluoroethylene) (PTFE) film electrode coated with a thin gold layer. The Li+ ion can be doped/undoped in the carbyne-like carbon film by electrochemical reduction/oxidation. The stoichiometry of the electrochemically reduced PTFE is estimated to be CLi0.48·2LiF which corresponds to a lithium ion battery negative electrode with ≈1100 mAh g−1 (of carbon) capacity.

The enhanced anodic performance of highly crimped and crystalline nanofibrillar carbon in lithium-ion batteries

“…This claim remains in dispute but it is generally agreed that the carbyne-like species are more stable than the carbene-like species. Thus, the higher irreversible capacity of the CC1500A sample might be due to a higher number of reactive carbene-like species at the peripheries of the carbon layers, which result from the annealing process [20]. Fig.…”

Low-Temperature Production of Genuinely Amorphous Carbon from Highly Reactive Nanoacetylide Precursors

“…The copper acetylide precursor of the present amorphous carbon contains a carbon-carbon triple bond. Although there are some techniques that can produce carbon materials with triply bonded carbons, the carbon triple bond of polycarbyne shows an intense Raman peak around 2000 cm −1 [16,17]; no such polycarbyne peak can be observed in Figure 3(c). Therefore, despite using acetylide precursors, which contain carbon triple bonds, the resulting materials are based on the graphite structure.…”

Regeneration of Fully-discharged Graphite-Fluoride Lithium Primary Battery as Electrochemical Capacitor

“…[19][20][21] Thus, it can be considered that the nanocomposite of carbon and LiF as the discharged products of the GF positive electrode can function as a capacitor-type electrode in spite of the presence of the insulating LiF as well as the defluorinated PTFE electrode. 25…”