Method for producing porous graphite, and porous graphite

Patent metadata

Field	Value
Publication number	US-10763511-B2
Application number	US-201816168173-A
Country	US
Kind code	B2
Filing date	Oct 23, 2018
Priority date	Sep 9, 2014
Publication date	Sep 1, 2020
Grant date	Sep 1, 2020

Abstract

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.

First claim

What is claimed is:

1. 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 m 2 /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.

2. The porous graphite according to claim 1 , wherein the ratio I D /I G of peak intensity (I D ) of the D band having a Raman shift in the vicinity of 1350 cm −1 to peak intensity (I G ) of the G band having a Raman shift in the vicinity of 1582 cm −1 of the Raman spectrum is 0.5 or less and full width at half maximum in the G band is 45 cm −1 or less.

3. The porous graphite according to claim 1 , wherein BET specific surface area is 2400 m 2 /g or more.

4. The porous graphite according to claim 1 , which is in the form of a sheet.

5. The porous graphite according to claim 1 , wherein BET specific surface area is 300 m 2 /g or more.

6. The porous graphite according to claim 1 , wherein BET specific surface area is 700 m 2 /g or more.

Assignees

• Tohoku Techno Arch Co Ltd
• Tpr Ind Co Ltd
• Tpr Co Ltd

Inventors

• Kato Hidemi
• YU Seung-Geun
• Wada Takeshi

Classifications

• C01B32/348

  Metallic compounds · CPC title

• C01B32/336

  characterised by gaseous activating agents · CPC title

• C01P2004/20

  extending in two dimensions, e.g. plate-like · CPC title

• C01B32/205 Primary

  Preparation · CPC title

• C01B32/20 Primary

  Graphite · CPC title