Raw material composite for carbon material used in electric double layer capacitor, manufacturing method of the same, electric double layer capacitor, and manufacturing method of the same
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United States of America Patent
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Apr 19, 2005
Grant Date -
Jul 8, 2004
app pub date -
Dec 1, 2003
filing date -
May 31, 2001
priority date (Note) -
Expired
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Abstract
A raw material composite 10 for a carbon material used in an electric double layer capacitor contains microcrystalline carbon having a layered crystal structure similar to graphite, and is formed a carbon material for an electric double layer capacitor by undergoing an activation treatment. Here, the raw material composite is characterized in that a Hardgrove grindability index HGI defined by ASTMD-409-71 is 50 or above, an interlayer distance d.sub.002 of the microcrystalline carbon determined by an X-ray diffraction method is 0.343 NM or below, and a crystallite size Lc.sub.002 of the microcrystalline carbon determined by the X-ray diffraction method is 3.0 nm or below.
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