Negative electrode material for secondary battery
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United States of America
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Mar 18, 2025
Grant Date -
Feb 2, 2023
app pub date -
Nov 23, 2021
filing date -
Nov 23, 2021
priority date (Note) -
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Abstract
A negative electrode material for a secondary battery includes a matrix containing silicon oxide, a composite oxide of one or more doping elements selected from the group consisting of an alkali metal, an alkaline earth metal, and a post-transition metal, and silicon, or a mixture thereof; and silicon nanoparticles dispersed and embedded in the matrix; wherein a hardness and a Young's modulus measured by a nanoindentation test are 4.0 GPa or more and 40 GPa or more, respectively, and in an X-ray diffraction pattern using a CuKα ray, a ratio (A1/A2) of an area (A1) of a first peak present in a region where a diffraction angle 2θ is 10° to 27.4° to an area (A2) of a second peak present in a region where the diffraction angle 2θ is 28±0.5° is 0.8 to 6.
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