NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

WIPO Patent Application WO/2014/142285

A1

[Problem] To provide a means for improving the long-term durability of a large nonaqueous electrolyte secondary battery capable of being used for uses such as powering an electric vehicle. [Solution] A nonaqueous electrolyte secondary battery having a positive electrode having a positive-electrode-active-material layer formed thereon which contains a positive-electrode active material on the surface of a positive-electrode collector, and a negative electrode having a negative-electrode-active-material layer formed thereon which contains a negative-electrode active material and an aqueous binder on the surface of the negative-electrode collector, wherein: the ratio of the cell surface area (projected area of cell including outer casing of cell) to the rated capacity is 5cm2/Ah or higher; the rated capacity is 3Ah or higher; the negative-electrode active material contains artificial graphite or coated natural graphite; and the percentage of the artificial graphite and coated natural graphite in the total amount of natural graphite, artificial graphite and coated natural graphite contained in the negative-electrode-active-material layer is 50% or higher by volume.

KAWAMURA FUMIHIRO (JP)
SUENAGA MASANORI (JP)
SHIMAMURA OSAMU (JP)
HAGIYAMA KOSUKE (JP)

PCT/JP2014/056800

September 18, 2014

March 13, 2014

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NISSAN MOTOR (JP)

H01M4/1393; H01M4/36; H01M4/525; H01M4/587; H01M4/62; H01M50/409; H01M50/443

JP2011023221A	2011-02-03
JP2010080297A	2010-04-08
JP2008181890A	2008-08-07
JP2007194209A	2007-08-02

HATTA & ASSOCIATES (JP)
Hatta international patent business corporation (JP)

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