| 摘要 |
PROBLEM TO BE SOLVED: To provide an electric double layer capacitor having high capacitance and small internal resistance, and to provide a carbon material used for a polarized material thereof. SOLUTION: The carbon material 21 is used for an electrode material of the electric double layer capacitor 1 wherein a sulfur content is 0.2 weight % or below, or the size L<SB>a</SB>of a crystallite that is calculated from an equation L<SB>a</SB>=Kλ/βcosθby the use of a half value breadthβ(radian) of a diffracted ray measured by an X-ray diffracted method about 110 surfaces, a diffracted angleθthereof, a wavelengthλof an X-ray used therefor, and a constant K=1.84 is within a range of 1nm to 3nm. COPYRIGHT: (C)2005,JPO&NCIPI
|
