GRAPHITE BASED HYDROGEN OCCLUSION MATERIAL AND ITS PRODUCTION METHOD

摘要

PROBLEM TO BE SOLVED: To provide a graphite based hydrogen occlusion material, having a hydrogen occluding amount higher than a porous material such as an activated carbon at a normal temperature by using an intercalation of a graphite, and also easy in production, and to provide its production method.;SOLUTION: The graphite based hydrogen occlusion material is an oxidized graphite covalent bonded with oxygen at the interlayer of the graphite, wherein a part or all of oxygen in the interlayer is took out and therefore this material is equipped with a space, formed in the interlayer, for hydrogen to enter. In its production, the oxidized graphite is used which has oxygen covalent bonded with the interlayer of the graphite and also has peaks at the angle of diffraction (2θ) of 13.5-16.0° and 26.0-26.6° by powder X-ray diffractometry. A reductive treatment of this oxidized graphite takes out a part or all of oxygen in the interlayer to form the space, in the interlayer, for hydrogen to enter and also to extinguish a peak at the angle of diffraction (2θ) of 13.5-16.0° and display a new peak at 2θ=19.5-20.5° or 21.0-23.0° by powder X-ray diffractometry.;COPYRIGHT: (C)2006,JPO&NCIPI