POSITIVE ELECTRODE COMPOSITION FOR LITHIUM ION SECONDARY CELL, POSITIVE ELECTRODE FOR LITHIUM ION SECONDARY CELL, AND LITHIUM ION SECONDARY CELL

Title:

POSITIVE ELECTRODE COMPOSITION FOR LITHIUM ION SECONDARY CELL, POSITIVE ELECTRODE FOR LITHIUM ION SECONDARY CELL, AND LITHIUM ION SECONDARY CELL

Document Type and Number:

WIPO Patent Application WO/2019/216275

Kind Code:

A1

Abstract:

A lithium ion secondary cell has high energy density, low internal resistance, and excellent output characteristics, cycle characteristics, and low-temperature characteristics, the lithium ion secondary cell being manufactured using a positive electrode composition for a lithium ion secondary cell, the positive electrode composition including lithium cobalt oxide as an active material, and as conductive materials, carbon black having a BET specific surface area of 100-400 m2 /g and DBP absorption of 210-400 ml/100 g, and carbon nanotubes having an average diameter of 20 nm or less, a BET specific surface area of 170 m2/g or more, and an aspect ratio of 50 or more, the content X (unit: mass%) of the carbon black and the content Y (unit: mass%) of the nanotubes in the positive electrode composition satisfying conditions (A) and (B). (A) 0.5 ≤ (X + Y) ≤ 2.0 (B) 0.80 ≤ {X/(X + Y)} ≤ 0.95

Inventors:

NAGAI TATSUYA (JP)
OSUMI SHINICHIRO (JP)
ITO TETSUYA (JP)

Application Number:

PCT/JP2019/017989

Publication Date:

November 14, 2019

Filing Date:

April 26, 2019

Export Citation:

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Assignee:

DENKA COMPANY LTD (JP)

International Classes:

H01M4/525; H01M4/131; H01M4/62

Domestic Patent References:

WO2018021073A1	2018-02-01
WO2016024525A1	2016-02-18
WO2018047454A1	2018-03-15
WO2014051067A1	2014-04-03
WO2013179909A1	2013-12-05

Foreign References:

JP2017182989A	2017-10-05
JP2007080652A	2007-03-29
JPH11176446A	1999-07-02
JP2001126733A	2001-05-11
JP2010238575A	2010-10-21

Other References: