Activated carbon and method for producing it
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United States of America Patent
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Jul 8, 2003
Grant Date -
N/A
app pub date -
Nov 16, 2000
filing date -
Nov 16, 1999
priority date (Note) -
Expired
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Abstract
The present invention provides an activated carbon produced by a process, which includes: activating a carbonaceous material, to obtain an activated carbonaceous material; and contacting the activated carbonaceous material with an acid. Another embodiment of the present invention provides an electrode for an electric double-layer capacitor, which includes the above-described activated carbon. Another embodiment of the present invention provides a filter, which includes the above-described activated carbon. Another embodiment of the present invention provides a shaped article, which includes the above-described activated carbon. Another embodiment of the present invention provides a method for producing activated carbon, which includes activating a carbonaceous material, to obtain an activated carbonaceous material; and contacting the activated carbonaceous material with an acid, to obtain the activated carbon. The acid-processed activated carbon has a strong affinity for water, and is particularly suitable for water purification. Electrodes produced by shaping the acid-processed activated carbon have the advantage of large electrostatic capacity per the unit volume, and are particularly suitable for capacitors.
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