Nonaqueous secondary cell

Details Nonaqueous secondary cell Nonaqueous secondary cell

2006-12-13

2010-02-09

Ryan, Patrick (Department: 1795)

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Include electrolyte chemically specified and method

C429S331000

Reexamination Certificate

active

07659037

ABSTRACT:
Using a positive electrode active material including spinel type manganese oxide as the main constituent, a novel low cost and high output power flat type nonaqueous secondary cell for HEVs that has increased safety at overcharge, and superior storage properties and cycle life is provided. A flat type nonaqueous secondary cell that has increased safety and is superior in storage and cycle properties even though the cell is a laminate type cell which does not have a blocking mechanism can be obtained by blending the spinel type lithium manganese oxide of the positive electrode and 5 wt % to 40 wt % of layered type lithium manganese oxide, to suppress storage deterioration at a high temperature and to simultaneously achieve safety when overcharged, and further, by adding a Li compound having a structure as shown in Formula (1) structure, to suppress deterioration of a mixed positive electrode active material during a high temperature cycle.

REFERENCES:
patent: 2005/0200795 (2005-09-01), Kobayashi et al.
patent: 2007/0015055 (2007-01-01), Lee et al.
patent: 2002-100358 (2002-04-01), None
patent: 2005-005117 (2005-01-01), None

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