Powder of carbonaceous matrix particles and a composite powder, for use in the negative electrode of a battery, comprising such a powder
AssigneesUmicore AG & Co. KG, Umicore Korea Ltd.
InventorsMichal Tulodziecki, Jean-Sébastien Bridel, Sul-Hee Min
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Abstract
A powder of carbonaceous matrix particles with silicon-based sub-particles dispersed therein, wherein the particles have a harmonic mean value of their average Vickers hardness value and their average elastic modulus value, both values of hardness and elasticity being measured by nanoindentation and expressed in MPa, being superior or equal to 7000 MPa and inferior or equal to 20000 MPa.
Claims16
A powder of carbonaceous matrix material particles, said particles comprising silicon-based sub-particles dispersed therein, said particles having a harmonic mean value HM calculated according to the formula (1),
- H
-
- M
- =
- 2
- ×
- H
- ×
- E
- H
- +
- E
- (
- 1
- )
- wherein H is the average Vickers hardness value of the particles of carbonaceous matrix material and E is the average elastic modulus value of the particles of carbonaceous matrix material, both values H and E being measured by nanoindentation and expressed in MPa, said powder being characterized in that HM is superior or equal to 7000 MPa and inferior or equal to 20000 MPa.
Dependencies are inferred from the claim text.