Carbon material and method for manufacturing carbon material
AssigneesSumitomo Electric Industries, Ltd., Kyoto University
InventorsTomoyuki Awazu, Masatoshi Majima, Yoshiki Nishibayashi, Toshiyuki Nohira, Kouji Yasuda, Kouji Hidaka
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Abstract
A carbon material has at least either a peak related to diamond bonds, or a peak related to diamond-like bonds, appearing in a range of 1250 to 1400 cm−1 in a spectrum measured by Raman scattering spectrometry, and a full width at half maximum of a maximum peak, or each of full widths at half maximum of the maximum peak and a second largest peak, among peaks appearing in the range of 1250 to 1400 cm−1, has a signal less than 100 cm−1.
Claims3
A method for manufacturing a carbon material, the method comprising the step of, in a state where a cathode having a roughened surface and an anode are disposed in a molten salt electrolytic solution containing carbonate ions and hydroxide ions in a molten salt, performing electrolytic reduction of the carbonate ions and the hydroxide ions contained in the molten salt electrolytic solution, to generate a carbon material on the cathode,
- wherein the cathode having the roughened surface is a cathode having a surface roughened by diamond abrasive grains having a grain diameter of 20 nm to 5 μm or silicon carbide abrasive grains having a grain diameter of 20 nm to 5 μm,
- wherein the carbon material has at least either a peak related to diamond bonds, or a peak related to diamond-like bonds, appearing in a range of 1250 to 1400 cm−1 in a spectrum measured by Raman scattering spectrometry, and
- wherein a full width at half maximum of a maximum peak, or each of full widths at half maximum of the maximum peak and a second largest peak, among peaks appearing in the range of 1250 to 1400 cm−1, has a signal less than 100 cm−1.
Dependencies are inferred from the claim text.