Nonaqueous electrolyte secondary battery

Details Nonaqueous electrolyte secondary battery Nonaqueous electrolyte secondary battery

2008-02-22

2010-06-29

Weiner, Laura S (Department: 1795)

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Include electrolyte chemically specified and method

C429S331000, C429S332000, C429S338000, C429S199000, C429S144000, C429S231100, C429S231300, C429S231800, C429S231400, C429S231600, C429S223000, C429S224000, C429S251000

Reexamination Certificate

active

07745057

ABSTRACT:
A nonaqueous electrolyte secondary battery10according to an embodiment of the invention includes a positive electrode11, a negative electrode12, a separator13and a nonaqueous electrolyte liquid in which not only the positive electrode11contains a positive electrode active material charged at or higher than 4.3 V based on lithium and a halogenated cyclic carbonate is added in the nonaqueous electrolyte liquid, but also an inorganic insulating material particle layer is formed on the surface of at least either of the positive electrode11, the negative electrode12and the separator13. By employing such a constitution in the present invention, a nonaqueous electrolyte secondary battery using a positive electrode charged at a high electric potential of 4.3 V or more based on lithium in which the amount of a generated gas is small even when the battery is overcharged at higher temperatures, and the impact safety and reliability thereof are high, can be provided.

REFERENCES:
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patent: 2007/0281206 (2007-12-01), Fujikawa et al.
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patent: 2006-310010 (2006-11-01), None
patent: WO 98/15024 (1998-04-01), None

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