Showa Denko K.k.

Ryusuke Miura

Masataka Takeuchi

Yoshiyuki Nishimura

Yuuichi Kamijou

Takayuki Fukai

Yasuaki Wakizaka

Chiaki Sotowa

A method for producing a graphie material for an electrode material for lithium ion batteries, including a step for exothermically graphitizing a carbon material by directly passing an electric current therethrough. The carbon material has an compact powder resistivity of 0.4 &#x3a9;&#xb7;cm or less when compressed to a density of 1.4 g/cm, has an angle of repose in the range of 20&#xb0; to 50&#xb0; inclusive, and has a particle size (D90) in the volume-based particle size distribution measured using laser diffraction of 120 &#x3bc;m or less. The average surface interval (d002) of a surface (002) of the carbon material after graphitization, measured using x-ray diffraction, is in the range of 0.3354 nm-0.3450 nm inclusive.

Method for producing electrode material for lithium ion batteries

A method for producing a graphite material for lithium ion batteries, including a step for exothermically graphitizing a carbon material by directly applying an electric current therethrough. The carbon material is obtained by heating at a temperature in the range of 800&#xb0; C.-1500&#xb0; C. inclusive and subsequently pulverizing an organic carbon starting material, has a compact powder resistivity of 0.3 &#x3a9; cm or less when compressed to a density of 1.4 g/cm, has an angle of repose in the range of 20&#xb0; to 50&#xb0; inclusive, and has a particle size (D90) in the volume-based particle size distribution measured using laser diffraction of 120 &#x3bc;m or less. The average surface interval (d002) of a surface (002) of the carbon material after graphitization, measured using x-ray diffraction, is in the range of 0.3354 nm-0.3450 nm inclusive.

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Tokyo, Japan

Ryusuke Miura