Graphite carbon powder, and method and apparatus for producing the same
AssigneeShowa Denko K.K.
InventorsAkinori Sudo, Chiaki Sotowa, Shigeru Murakami
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Abstract
An object of the present invention is to provide a method for producing at high productivity graphite powder containing no impurity, in which carbon powder material is effectively heated for graphitization; and an apparatus for producing the graphite powder. Carbon powder is placed in a carbon-made container, and the container is heated through a supply of electricity to the container. An apparatus comprising a heating chamber is provided. The container can be continuously conveyed to the apparatus, heated in the apparatus, and removed from the apparatus. Through use of the apparatus, graphite carbon powder which is suitably employed in a lithium-ion secondary battery can be produced.
Claims9
A method for producing graphite carbon powder, comprising filling a container made of carbon having electrical resistance and electrical conductivity with carbon powder which has been prepared from carbon material through crushing in advance, supplying electrical current directly to the container, and passing electrical current through the container to thereby heat the carbon powder for graphitization by means of ohmic-resistance heat generated from the container.
Dependencies are inferred from the claim text.