NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY - HITACHI VEHICLE ENERGY, LTD.

Title:

NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY

Document Type and Number:

WIPO Patent Application WO/2012/014259

Kind Code:

A1

Abstract:

Provided is a non-aqueous electrolyte secondary battery containing amorphous carbon as the base of a negative-electrode active material and having high energy density, small loss of capacity when stored in charged state, and excellent cycle life characteristics. The secondary battery is provided with a negative-electrode active material that is a mixture of graphitizable carbon, non-graphitizable carbon, and graphite, said negative-electrode active material being composed of graphite and composite particles having a structure in which non-graphitizable carbon is bonded to particle surfaces of graphitizable carbon. In particular, the non-graphitizable carbon content is preferably 0.5 to 7% of the total weight of the mixture, the graphite content is preferably 5 to 20% of the total weight of the mixture, and the non-graphitizable carbon is preferably provided on the particle surfaces of the graphitizable carbon by a mechanochemical treatment.

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Inventors:

OHNO, Yusuke (1410, Inada, Hitachinaka-sh, Ibaraki 61, 〒3120061, JP)
大野　雄介 (〒61 茨城県ひたちなか市稲田１４１０番地　日立ビークルエナジー株式会社内 Ibaraki, 〒3120061, JP)

Application Number:

JP2010/004842

Publication Date:

February 02, 2012

Filing Date:

July 30, 2010

Export Citation:

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Assignee:

HITACHI VEHICLE ENERGY, LTD. (1410, Inada Hitachinaka-sh, Ibaraki 61, 〒3120061, JP)
日立ビークルエナジー株式会社 (〒61 茨城県ひたちなか市稲田１４１０番地 Ibaraki, 〒3120061, JP)
OHNO, Yusuke (1410, Inada, Hitachinaka-sh, Ibaraki 61, 〒3120061, JP)

International Classes:

H01M10/0566; H01M4/36; H01M4/587

Attorney, Agent or Firm:

INOUE, Manabu et al. (6-1, Marunouchi 1-chome, Chiyoda-k, Tokyo 20, 〒1008220, JP)

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Claims:

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