Abstract
Preparation of a carbonaceous thin film by plasma-assisted chemical vapor deposition was summarized. First, the resulting carbonaceous thin films were characterized. The resulting carbonaceous thin films were composed of sp2-type carbon and the interlayer spacing (d002) evaluated from X-ray diffraction patterns and the full width at half maximum of the G band in the Raman spectra ascribed the structure of the resulting carbonaceous thin film to a turbostratic structure. The crystallite orientation was depended on the applied rf power based on the transmission electron microscope images. Next, the resulting carbonaceous thin film was used as a negative electrode of lithium-ion batteries. Based on the various electrochemical measurements, it was found that the resulting carbonaceous thin film can be used as a model electrode. The lithium-ion insertion/extraction model was discussed. Finally, the carbonaceous thin film was applied to a coating-layer of metal as a bipolar plate material for polymer electrolyte fuel cells. The improvement in the corrosion property (suppression of metal dissolution) of carbon steel by the carbon-coating was provided by the electroless Ni plating on the carbon steel prior to the carbon-coating.
