Title:
NEGATIVE-ELECTRODE ACTIVE SUBSTANCE, MIXED NEGATIVE-ELECTRODE ACTIVE SUBSTANCE MATERIAL, AND METHOD FOR MANUFACTURING NEGATIVE-ELECTRODE ACTIVE SUBSTANCE
Document Type and Number:
WIPO Patent Application WO/2017/217077
Kind Code:
A1
Abstract:
The present invention is a negative electrode-active substance that includes negative-electrode active substance particles, wherein: the negative-electrode active substance particles contain silicon compound particles including a silicon compound containing oxygen; the silicon compound particles contain a Li compound; an aluminum-phosphorus composite oxide adheres to at least a part of the surface of the negative-electrode active substance particles; the aluminum-phosphorus composite oxide is a mixture of P2O5 and Al2O3; the mass ratio of the P2O5 and Al2O3 is within the range of 1.2 < P2O5 / Al2O3 < 3.0; and the negative-electrode active substance particles to which the aluminum-phosphorus composite oxide adheres have at least one peak, in a P2p waveform obtained with x-ray photoelectron spectroscopy, within the range of more than 135 eV of binding energy and no more than 144 eV. A negative electrode substance can thereby be provided in which, when used as the negative electrode substance of a secondary cell, cell capacity is increased and cycle characteristics and initial charge/discharge characteristics are improved while stabilizing the slurry.
Inventors:
HIROSE TAKAKAZU (JP)
MATSUNO TAKUMI (JP)
SAKAI REIKO (JP)
MATSUNO TAKUMI (JP)
SAKAI REIKO (JP)
Application Number:
PCT/JP2017/013430
Publication Date:
December 21, 2017
Filing Date:
March 30, 2017
Export Citation:
Assignee:
SHINETSU CHEMICAL CO (JP)
International Classes:
H01M4/48; H01M4/36; H01M4/58
Foreign References:
| JP2014103019A | 2014-06-05 | |||
| JP2013519990A | 2013-05-30 | |||
| JP2011096455A | 2011-05-12 |
Other References:
See also references of EP 3471178A4
Attorney, Agent or Firm:
YOSHIMIYA Mikio et al. (JP)
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