ANODE ACTIVE MATERIAL AND BATTERY

摘要

PROBLEM TO BE SOLVED: To provide a battery which can attain a high capacity and control swelling.

SOLUTION: The battery is provided with a wound electrode body 20 which is made by laminating and winding a cathode 21 and an anode 22 with a separator 23 and an electrolyte in between inside an outer member made of an aluminum-laminated film. An anode active material layer 22B contains a combined graphite material in which a plurality of primary particles composed of porous graphite are combined so that oriented faces at least partially are combined with each other in non-parallel to form secondary particles. As for this combined graphite material, an estimated area of pores with a pore diameter of 10 nm or more and 1×105nm or less in a mercury press-fit method shall be 0.5 cm3/g or more and 1.5 cm3/g or less per a unit mass.

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