Abstract
Bimodal porous carbons with both micropores and meso- or macropores were selectively synthesized by an SiO 2 colloidal crystal-templating process. The SiO 2 opal templates exclusively contributed to the formation of meso-and macropores in carbons. The electrical double-layer capacitance per surface area of the templated porous carbons was much larger than those of commercially available activated carbons with high surface areas. The surface of meso- and macropores generated in the porous carbons shows a highly efficient electrical double-layer capacitive property; the specific capacitance per surface area originating from meso- and/or macropores was estimated to be 20 ′ 2 μF cm - 2 .
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