Umicore

Kun Feng

Boaz Moeremans

Jean-Sébastien Bridel

Stijn Put

Nicolas Marx

Michal Tulodziecki

A powder for use in a negative electrode of a battery, comprising a mixture of a first number-based fraction of particles comprising a carbonaceous matrix material and silicon-based particles dispersed therein, and a second number-based fraction of particles, comprising Si-free carbonaceous particles comprising graphitic domains having a mean size of at least 10 nm and at most 45 nm, as determined by the Scherrer equation applied to the powder's X-ray diffraction peak assigned to C(002) having an intensity IC with its maximum at 2θbetween 26° and 27°.

Powder for use in the negative electrode of a battery and a battery comprising such a powder

A powder for use in a negative electrode of a battery, said powder comprising particles, wherein the particles comprise a carbonaceous matrix material and silicon-based domains dispersed in the carbonaceous matrix material, wherein the particles further comprise pores wherein at least 1000 cross-sections of pores comprised in a cross-section of the powder satisfy optimized conditions of size and size distribution, allowing the battery containing such a powder to achieve a superior cycle life and a production method of such a powder.

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Olen, Belgium

Kun Feng