Carbonaceous material, its production process and electric double layer capacitor employing it
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United States of America Patent
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Mar 8, 2005
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N/A
app pub date -
Apr 27, 2000
filing date -
Apr 30, 1999
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Expired
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Abstract
A carbonaceous material having a total pore volume of from 0.5 to 1.5 cm.sup.3 /g per unit mass, a volume of micropores having diameters of from 10 to 20 .ANG. of from 10 to 45% based on the total pore volume, a volume of mesopores having diameters of from 20 to 200 .ANG. of from 35 to 65% based on the total pore volume, a volume of macropores having diameters exceeding 200 .ANG. of not more than 15% based on the total pore volume, and a specific surface area of from 1,000 to 2,500 m.sup.2 /g. The carbonaceous material is incorporated into an electric double layer capacitor to provide increased capacitance.
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