Negative electrode material for lithium ion secondary battery, negative electrode for lithium ion secondary battery, and lithium ion secondary battery
AssigneeShowa Denko Materials Co., Ltd.
InventorsWakana OKAMURA, Kento HOSHI
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Abstract
A negative electrode active material for a lithium ion secondary battery includes graphite particles for which an R value measured by Raman spectrometry is less than 0.27, and an intensity ratio (P1/P2) of a diffraction peak (P1) on a hexagonal structure (101) plane to a diffraction peak (P2) on a rhombohedral structure (101) plane in an X-ray diffraction pattern by CuKα ray is 5.0 or less.
Claims9
A negative electrode material for a lithium ion secondary battery, the material comprising graphite particles for which an R value measured by Raman spectrometry is less than 0.27, and an intensity ratio (P1/P2) of a diffraction peak (P1) on a hexagonal structure (101) plane to a diffraction peak (P2) on a rhombohedral structure (101) plane in an X-ray diffraction pattern by CuKα ray is 5.0 or less.
A negative electrode material for a lithium ion secondary battery, the material comprising graphite particles, for which an R value measured by Raman spectrometry is less than 0.27, and an intensity ratio (P3/P4) of a diffraction peak (P3) on a carbon (002) plane to a diffraction peak (P4) on a carbon (110) plane in an X-ray diffraction pattern by CuKα ray is 1000 or less.
Dependencies are inferred from the claim text.