NEGATIVE ELECTRODE ACTIVE MATERIAL, MIXED NEGATIVE ELECTRODE ACTIVE MATERIAL, NEGATIVE ELECTRODE FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY, LITHIUM ION SECONDARY BATTERY, METHOD FOR PRODUCING NEGATIVE ELECTRODE ACTIVE MATERIAL, AND METHOD FOR PRODUCING LITHIUM ION SECONDARY BATTERY

Title:

Document Type and Number:

WIPO Patent Application WO/2017/085911

Kind Code:

A1

Abstract:

The present invention is a negative electrode active material that includes negative electrode active material particles, said negative electrode active material being characterized in that: the negative electrode active material particles contain silicon compound particles that include a silicon compound (SiOX: 0.5 ≤ x ≤ 1.6); the negative electrode active material particles contain crystalline Li2SiO3 in at least a portion thereof; and in the negative electrode active material particles, the strength A of a peak derived from Li2SiO3 obtained from a 29Si-MAS-NMR spectrum, the strength B of a peak derived from Si, the strength C of a peak derived from Li2Si2O5, and the strength D of a peak derived from SiO2 satisfy formula 1 or formula 2. This makes it possible to provide a negative electrode active material which, when used as a negative electrode active material for a lithium ion secondary battery, can increase battery capacity and improve cycling characteristics and initial charging/discharging characteristics. A > B > D … (1) A > C > D … (2)

Inventors:

HIROSE TAKAKAZU (JP)
KAMO HIROMICHI (JP)

Application Number:

PCT/JP2016/004807

Publication Date:

May 26, 2017

Filing Date:

November 04, 2016

Export Citation:

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Assignee:

SHINETSU CHEMICAL CO (JP)

International Classes:

H01M4/36; H01M4/48; H01M4/485; H01M4/66

Domestic Patent References:

WO2015063979A1

2015-05-07

Foreign References:

JP2015156355A	2015-08-27
JP2015165482A	2015-09-17
JP2015153520A	2015-08-24
JP2013251097A	2013-12-12
JP2015508559A	2015-03-19

Other References: