NEGATIVE ELECTRODE ACTIVE MATERIAL, NEGATIVE ELECTRODE, LITHIUM ION SECONDARY BATTERY, MANUFACTURING METHOD FOR NEGATIVE ELECTRODE ACTIVE MATERIAL, AND MANUFACTURING METHOD FOR LITHIUM ION SECONDARY BATTERY

Title:

Document Type and Number:

WIPO Patent Application WO/2017/110040

Kind Code:

A1

Abstract:

The present invention is a negative electrode active material including negative electrode active material particles, characterized in that: the negative electrode active material particles contain a silicon compound represented by SiOx (0.5≤x≤1.6); when the negative electrode active material including the negative electrode active material particles is used for the negative electrode of a secondary battery including metal lithium as the counter electrode, in a state where a cycle of 0-V constant-current constant-voltage charging and 1.2-V constant-current discharging of the secondary battery is repeated X times (X>0), and subsequently, 0-V constant-current constant-voltage charging of the secondary battery (wherein, the charging is terminated after elapse of 60 hours since 0 V is reached) is further performed, the negative electrode active material after the charging termination has peaks within a range of 25-55 ppm and a range of 0-3 ppm, in terms of a chemical shift value, obtained from a 7Li-MAS-NMR spectrum. Thus, provided is a negative electrode active material which can, when being used as a negative electrode active material for a secondary battery, increase the battery capacity and improve the cycle characteristics.

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Inventors:

HIROSE TAKAKAZU (JP)
KAMO HIROMICHI (JP)
MATSUNO TAKUMI (JP)
SAKAI REIKO (JP)

Application Number:

PCT/JP2016/004972

Publication Date:

June 29, 2017

Filing Date:

November 28, 2016

Export Citation:

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Assignee:

SHINETSU CHEMICAL CO (JP)

International Classes:

H01M4/48; H01M4/13; H01M4/36; H01M4/66

Foreign References:

JP2015111547A	2015-06-18
JP2014220216A	2014-11-20

Attorney, Agent or Firm:

YOSHIMIYA, Mikio et al. (JP)

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