Title:
NEGATIVE ELECTRODE ACTIVE SUBSTANCE FOR SECONDARY BATTERY, METHOD FOR PRODUCING SAME, AND SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2021/153077
Kind Code:
A1
Abstract:
This negative electrode active substance for a secondary battery comprises silicate complex particles containing silicon particles and a lithium silicate phase. The silicon particles are dispersed in the lithium silicate phase, and the porosity of the silicate complex particles is 2% or less. In addition, in a diffraction pattern obtained using an X-Ray diffraction method (XRD), the ratio, I1/I1, of the integrated intensity I2 of peaks derived from the lithium silicate phase occurring within the range 2θ=23-25º relative to the integrated intensity I1 of peaks derived from the Si (111) face of the silicon particles occurring within the range 2θ=27-30º is 0.3 or less.
Inventors:
OKAZAKI KEITA
SEKI NAOKI
SEKI NAOKI
Application Number:
PCT/JP2020/047196
Publication Date:
August 05, 2021
Filing Date:
December 17, 2020
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
C01B33/02; C01B33/32; H01M4/134; H01M4/36; H01M4/38
Domestic Patent References:
| WO2016035290A1 | 2016-03-10 | |||
| WO2016121321A1 | 2016-08-04 | |||
| WO2019065766A1 | 2019-04-04 | |||
| WO2019130787A1 | 2019-07-04 |
Foreign References:
| JP2013251097A | 2013-12-12 | |||
| JP2019012646A | 2019-01-24 | |||
| JP2015153520A | 2015-08-24 |
Attorney, Agent or Firm:
KAMATA Kenji et al. (JP)
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