Electric double layer capacitances of carbonaceous materials containing nitrogen prepared by pyrolysis of organic precursors


Masayuki Kawaguchi, kawaguti@isc.osakac.ac.jp1, Sayoko Yagi2, Takeshi Yamanaka, m05125@mail.osakac.ac.jp2, and Hideaki Ito3. (1) Department of Applied Chemistry, Osaka Electro-Communication University, 18-8 Hatsu-Cho, Neyagawa, 572-8530, Japan, (2) Graduate School of Engineering, Osaka Electro-Communication University, 18-8 Hatsu-Cho, Neyagawa, 572-8530, Japan, (3) Nippon Soda Co.Ltd, 12-54 Goi-minamikaigan, Ichihara, 290-0045, Japan
Carbonaceous materials containing nitrogen (C/N materials) were prepared by pyrolysis of 2,3,6,7-tetracyano-1,4,5,8-tetraazanaphthalene (CAN) and other organic precursors. A C/N material prepared by the pyrolysis of CAN at 1070K (CAN 1070K) had a C/N atomic ratio of 3.0 and showed non-crystalline carbonaceous structure with BET surface area of 880m2/g. The material (CAN 1070K) showed the large capacitance of 160F/g by using 3 electrode cell in 1M-H2SO4 aqueous solution. An activated carbon having BET surface area of 2300m2/g showed the capacitance (160F/g) similar to those of the C/N materials. ESCA study indicates that pyridine-type and quarternary nitrogen atoms exist in the C/N materials, which may cause polarization in the material and interact strongly with ions in the solution. Also introduction of nitrogen into the carbonaceous material could better the wettability of material, which may also improve the capacitance.