HIGH-SAFETY/HIGH-ENERGY-DENSITY CELL

Title:

HIGH-SAFETY/HIGH-ENERGY-DENSITY CELL

Document Type and Number:

WIPO Patent Application WO/2016/152991

Kind Code:

A1

Abstract:

Provided is a high-safety/high-energy-density cell in which concerns about safety when the amount of lithium that can be accepted by a negative-electrode carbon material is less than the amount of lithium that can be discharged by the positive-electrode active material are overcome by using a large amount of metal material in the negative-electrode active material to increase energy density. The present invention pertains to a lithium-ion secondary cell in which the positive electrode has a charge capacity per unit area of 3mAh/cm2 or more, the negative electrode includes carbon and a metal and/or a metal oxide as negative-electrode active materials, the amount of lithium that can be accepted by the carbon included in the negative electrode is less than the amount of lithium that can be discharged by the positive electrode, and the thermal shrinkage of a separator in the electrolyte is 3% or less at the boiling point of the electrolyte.

Inventors:

INOUE KAZUHIKO (JP)
SHIMURA KENICHI (JP)
KAWASAKI DAISUKE (JP)
YOSHIDA NOBORU (JP)

Application Number:

PCT/JP2016/059445

Publication Date:

September 29, 2016

Filing Date:

March 24, 2016

Export Citation:

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Assignee:

NEC CORP (JP)

International Classes:

H01M10/052; H01M4/133; H01M4/134; H01M4/36; H01M4/38; H01M10/0566; H01M10/058; H01M50/414; H01M50/423; H01M50/491; H01M50/443; H01M50/489

Foreign References:

JP2011228052A	2011-11-10
JP2007305574A	2007-11-22
JP2014240189A	2014-12-25
JP2014103087A	2014-06-05

Other References: