METHOD FOR PRODUCING NON-EXFOLIATED GRAPHITE POWDER, NON-EXFOLIATED GRAPHITE POWDER, ELECTRICALLY CONDUCTIVE CARBON MATERIAL, POSITIVE ELECTRODE MIXTURE, AND ALKALINE MANGANESE BATTERY

摘要

PROBLEM TO BE SOLVED: To provide an alkaline manganese battery having excellent discharge characteristics by obtaining a new kind of graphite powder and using the graphite powder as an electrically conductive carbon material for a positive electrode mixture of the alkaline battery.;SOLUTION: When a non-exfoliated graphite powder is obtained from non-exfoliated graphite particles, a laminated layer face in each non-exfoliated graphite particle is exfoliated. The obtained non-exfoliated graphite powder is useful as an electrically conductive carbon material, and used as an excellent constitutive carbon material of a positive electrode mixture of an alkaline battery, which is composed of main constitutive materials of manganese dioxide and the electrically conductive carbon material. The positive electrode formed of such a positive electrode mixture is used to increase the discharge capacity and to greatly improve discharge characteristics, especially, use performance in pulse discharge in a range of a middle current to a large current in the alkaline manganese battery. The non-exfoliated graphite powder as the electrically conductive carbon material has an average particle size of 1.0-40.0 m, an apparent density of 0.02-0.12 g/cm³, and a specific surface area of 2.0-8.0 m²/g. This non-exfoliated graphite powder can be also used by blending it with a normal graphite powder or an exfoliated graphite powder.;COPYRIGHT: (C)2006,JPO&NCIPI