Anode active material and battery

Details Anode active material and battery Anode active material and battery

2011-04-05

2011-04-05

Crepeau, Jonathan (Department: 1725)

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

C429S316000, C429S317000

Reexamination Certificate

active

07919208

ABSTRACT:
A battery capable of obtaining a high capacity and reducing its expansion is provided. A spirally wound electrode body formed through laminating a cathode and an anode with a separator and an electrolyte in between to form a laminate and spirally winding the laminate is included in a package member made of an aluminum laminate film. An anode active material layer includes an agglomerated graphite material in which a plurality of primary particles made of graphite having fine pores are agglomerated so that the orientation planes thereof are not parallel to each other, at least in part, to form secondary particles. In the agglomerated graphite material, the total volume of fine pores with a diameter from 10 nm to 1×105nm inclusive estimated by mercury porosimetry ranges from 0.5 cm3/g to 1.5 cm3/g inclusive per unit weight.

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