Back to results
US 2022/0045316 A1Published application
Negative electrode active material, negative electrode, and secondary battery
AssigneeMurata Manufacturing Co., Ltd.
InventorYasuhiro IKEDA
Life of this patent
Estimating the term…
Abstract
A negative electrode active material includes a first negative electrode active material particle, and the first negative electrode active material includes a silicon-based material. A Si2p spectrum obtained by measuring the first negative electrode active material particle in a state of 0.6 V (vs. Li/Li+) by X-ray photoelectron spectroscopy has a peak in a range from 99.0 eV to 105.0 eV, and a half width of the peak is 1.5 eV or more and 8.0 eV or less.
Claims12
A negative electrode active material comprising:
- a first negative electrode active material particle including a silicon-based material,
- wherein a Si2p spectrum obtained by measuring the first negative electrode active material particle in a state of 0.6 V (vs. Li/Li+) by X-ray photoelectron spectroscopy has a peak in a range from 99.0 eV to 105.0 eV, and
- wherein a half width of the peak is 1.5 eV or more and 8.0 eV or less.
Dependencies are inferred from the claim text.