Title:
ACTIVE MATERIAL, METHOD FOR PRODUCING SAME, ELECTRODE, AND SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2022/172603
Kind Code:
A1
Abstract:
This active material includes as constituent elements a first element including at least one of silicon, oxygen, boron, and phosphorous, a second element including at least one of an alkali metal element, a transition element, and a typical element (excluding silicon, oxygen, boron, phosphorous, alkali metal elements, and alkaline earth metal elements), and a third element including an alkaline earth metal element. The silicon content in the total constituent elements excluding oxygen and carbon is 60-98 at% (inclusive), the first element content in the total constituent elements is 1-25 at% (inclusive), the second element content in the total constituent elements is 1-34 at% (inclusive), and the third element content in the total constituent elements is 0-6 at% (inclusive). In an XPS spectrum (where the horizontal axis is binding energy (eV) and the vertical axis is spectral intensity) of Si2p measured using X-ray photoelectron spectroscopy (XPS), a first peak is detected, the first peak having a top in a range in which the binding energy is 102-105 eV (inclusive), and a shoulder on a side of the top where the binding energy is lower. In a Raman spectrum (where the horizontal axis is the Raman shift (cm-1) and the vertical axis is spectral intensity) measured using Raman spectroscopy, two peaks having tops in a range in which the Raman shift is 435 cm-1 to 465 cm-1 (inclusive) are detected. The active material has a plurality of pores, and in the pore distribution (where the horizontal axis is the pore diameter (μm) of the pores and the vertical axis is the change rate of mercury penetration) measured using mercury porosimetry, a third peak is detected, the third peak having a top in a range in which the pore diameter is 0.01-10 μm (inclusive).
Inventors:
ITO DAISUKE (JP)
Application Number:
PCT/JP2021/047210
Publication Date:
August 18, 2022
Filing Date:
December 21, 2021
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H01M4/36; H01M4/58
Domestic Patent References:
| WO2011138964A1 | 2011-11-10 | |||
| WO2013018721A1 | 2013-02-07 | |||
| WO2014200063A1 | 2014-12-18 |
Foreign References:
| JP2013047162A | 2013-03-07 | |||
| JP2013067543A | 2013-04-18 | |||
| JP2019518311A | 2019-06-27 | |||
| JP2014051418A | 2014-03-20 |
Attorney, Agent or Firm:
TSUBASA PATENT PROFESSIONAL CORPORATION (JP)
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