公开(公告)号：US20230395805A1

公开(公告)日：2023-12-07

申请号：US18022035

申请日：2021-08-19

申请人： NIPPON CHEMI-CON CORPORATION

发明人： Satoyuki TATSUMI ,  Noriyuki MIYAMOTO ,  Daisuke HORII ,  Satoshi KUBOTA ,  Kyohei YOSHIOKA ,  Sekihiro TAKEDA

IPC分类号： H01M4/62 ,  H01M4/04 ,  H01M4/1391 ,  C01B32/05 ,  H01G11/38 ,  H01G11/28 ,  H01G11/86

CPC分类号： H01M4/625 ,  H01M4/0404 ,  H01M4/043 ,  H01M4/1391 ,  C01B32/05 ,  H01G11/38 ,  H01G11/28 ,  H01G11/86 ,  C01P2006/40

摘要： The present invention provides a conductive carbon which enables the achievement of an electricity storage device that has high energy density, while exhibiting improved charge/discharge cycle stability even during high voltage application. A conductive carbon according to the present invention is produced by a method which comprises: an oxidation step wherein a carbon starting material is subjected to an oxidation treatment, thereby obtaining an oxidation-treated carbon that spreads in a paste-like state when a pressure is applied thereto; and a heat treatment step wherein the oxidation-treated carbon is subjected to a heat treatment under a vacuum or in a non-oxidizing atmosphere. Since CO2 is separated from the oxidation-treated carbon during the heat treatment process, the amount of CO2 generated from the thus-obtained conductive carbon in the temperature range of from 25° C. to 200° C. is smaller than the amount of CO2 generated from the oxidation-treated carbon in the temperature range of from 25° C. to 200° C. It is preferable that the heat treatment is carried out in such a manner that the amount of CO2 generated from the thus-obtained conductive carbon in the temperature range of from 25° C. to 200° C. is within the range of from 0.015% by mass to 0.050% by mass of the entire conductive carbon.