Composite powder for use in the negative electrode of a battery and a battery comprising such a composite powder
AssigneeUmicore AG & Co. KG
InventorsJean-Sébastien Bridel, Kun Feng
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Abstract
A composite powder for use in a negative electrode of a battery comprising composite particles, said composite particles comprising a carbon matrix material and silicon-based particles embedded in said carbon matrix material, said composite powder having a Raman spectrum, wherein a D band and a D'band, both corresponding to the carbon matrix material contribution, have their respective maximum intensity ID between 1330 cm−1 and 1360 cm−1 and ID′ between 1600 cm−1 and 1620 cm−1, wherein the ratio ID/ID′ is at least equal to 0.9 and at most equal to 4.0.
Claims17
A composite powder for use in a negative electrode of a battery comprising composite particles, said composite particles comprising a carbon matrix material and silicon-based particles embedded in said carbon matrix material, said composite powder having a Raman spectrum, wherein a D band and a D′ band, both corresponding to the carbon matrix material contribution, have their respective maximum intensity Ip between 1330 cm−1 and 1360 cm−1 and ID′ between 1600 cm−1 and 1620 cm−1, wherein the ratio ID/ID′ is at least equal to 0.9 and at most equal to 3.8.
Dependencies are inferred from the claim text.