POSITIVE ELECTRODE STRUCTURE AND SECONDARY BATTERY

Title:

POSITIVE ELECTRODE STRUCTURE AND SECONDARY BATTERY

Document Type and Number:

WIPO Patent Application WO/2020/071336

Kind Code:

A1

Abstract:

The present invention provides a positive electrode structure which is provided with a collector and a positive electrode mixture layer that is arranged on one surface or both surfaces of the collector, and which is configured such that: the positive electrode mixture layer has a thickness of 69 μm or more; the positive electrode mixture layer has a density of 3.0-5.0 g/cm3; the positive electrode mixture layer contains a positive electrode active material and a binder; the positive electrode active material contains lithium-nickel composite oxide; the binder contains a fluorine-containing copolymer; the fluorine-containing copolymer contains a vinylidene fluoride unit and a fluorinated monomer unit (excluding a vinylidene fluoride unit); and the fluorine-containing copolymer has a storage elastic modulus (E') of 100-1,100 MPa at 30°C and a storage elastic modulus (E') of 50-500 MPa at 60°C as determined by dynamic viscoelasticity measurement.

Inventors:

SHINODA CHIHIRO (JP)
KITAHARA TAKAHIRO (JP)
HOSODA KAZUKI (JP)
ICHINOSE YUMA (JP)

Application Number:

PCT/JP2019/038619

Publication Date:

April 09, 2020

Filing Date:

September 30, 2019

Export Citation:

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Assignee:

DAIKIN IND LTD (JP)

International Classes:

H01M4/131; H01M4/1391; H01M4/62

Domestic Patent References:

WO2011002097A1	2011-01-06
WO2015151501A1	2015-10-08
WO2006080259A1	2006-08-03

Foreign References:

JP2008218385A	2008-09-18
JP2016126852A	2016-07-11
JP2015109154A	2015-06-11
JP2003151558A	2003-05-23
JP2017117754A	2017-06-29
JP2001085060A	2001-03-30
JP2018152293A	2018-09-27
JP2013149370A	2013-08-01

Other References: