Title:
NEGATIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM ION SECONDARY BATTERY, NEGATIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERY, AND LITHIUM ION SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2018/179813
Kind Code:
A1
Abstract:
A negative electrode active material for a lithium ion secondary battery comprising silicon oxide particles having carbon present in a portion or the entirety of the surface thereof wherein the ratio (PSi/PSiO
2) of the X ray diffraction peak intensity at 2θ=27° to 29° originating from Si, relative to the X ray diffraction peak intensity at 2θ=20° to 25° originating from SiO2, falls in the range of 1.0 to 2.6 when CuKα radiation with a wavelength of 0.15406 nm is used as the beam source, and the aspect ratio represented by the ratio (S/L) between a long axis L and a short axis S thereof, has a mean value that falls in the range of 0.45≤S/L≤1.
Inventors:
YASUDA AKIRA (JP)
OHSAKI YOSHIE (JP)
NISHIDA TATSUYA (JP)
OHSAKI YOSHIE (JP)
NISHIDA TATSUYA (JP)
Application Number:
PCT/JP2018/003286
Publication Date:
October 04, 2018
Filing Date:
January 31, 2018
Export Citation:
Assignee:
HITACHI CHEMICAL CO LTD (JP)
International Classes:
H01M4/48; H01M4/36; H01M4/38
Domestic Patent References:
| WO2015080203A1 | 2015-06-04 | |||
| WO2016147976A1 | 2016-09-22 | |||
| WO2015159935A1 | 2015-10-22 |
Foreign References:
| JP2016522139A | 2016-07-28 | |||
| JP2010086896A | 2010-04-15 | |||
| JP2016164884A | 2016-09-08 | |||
| JP2015210962A | 2015-11-24 | |||
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| JP2015028855A | 2015-02-12 | |||
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Other References:
See also references of EP 3605671A4
Attorney, Agent or Firm:
TAIYO, NAKAJIMA & KATO (JP)
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