Group14 Technologies, Inc.

Jinseok Baek

Yuji Ito

Hirofumi Inoue

Takayuki Kurita

Kohei Akimoto

Composite carbon particles including a porous carbon material and a silicon component, the composite carbon particle having an average aspect ratio of 1.25 or less, and a ratio (I/I) of a peak intensity (I) in the vicinity of 470 cmto a peak intensity (I) in the vicinity of 1580 cmas measured by Raman spectroscopy of 0.30 or less, wherein the porous carbon material satisfies V/V>0.80 and V/V<0.10, when a total pore volume at a maximum value of a relative pressure P/Pis defined as Vand Pis a saturated vapor pressure, a cumulative pore volume at a relative pressure P/P=0.1 is defined as V, a cumulative pore volume at a relative pressure P/P=10is defined as Vin a nitrogen adsorption test, and has a BET specific surface area of 800 m/g or more.

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Tokyo, Japan

Jinseok Baek