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AssigneesTohoku Techno Arch Co., Ltd., Tpr Co., Ltd.
InventorsHidemi Kato, Seung-Geun Yu, Takeshi Wada
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A method for producing porous graphite capable of realizing higher durability, output and capacity, and porous graphite. A carbon member having microvoids is obtained by a dealloying step for selectively eluting other non-carbon main components into a metal bath by immersing a carbon-containing material, composed of a compound including carbon or an alloy or non-equilibrium alloy, in the metal bath, wherein the metal bath has a solidifying point lower than the melting point of the carbon-containing material, and is controlled to a temperature lower than the minimum value of a liquidus temperature within a composition fluctuation range extending from the carbon-containing material to carbon by reducing the other non-carbon main components. The carbon member obtained in the dealloying step is graphitized by heating in a graphitization step. The carbon member graphitized in the graphitization step is subjected to activation treatment by an activation step.
A porous graphite, wherein the (002) average interplanar spacing as calculated from (002) diffraction peak of graphite in bulk is 0.342 nm or less, pores having a size of 2 nm to 100 nm are contained at 80% or more of total pore volume, BET specific surface area is 100 m2/g or more, the full width at half maximum of the (002) diffraction peak is 1.02° or less and crystallite size is 9 nm or more and 11.754 nm or less.
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