公开(公告)号：EP0972313A1

公开(公告)日：2000-01-19

申请号：EP98911190.1

申请日：1998-04-03

申请人： Sony Corporation ,  KUREHA KAGAKU KOGYO KABUSHIKI KAISHA

发明人： YAMADA, ShinichiroSony Corporation ,  IMOTO, HiroshiSony Corporation ,  AZUMA, HidetoSony Corporation ,  SENOO, TadashiSony Corporation ,  SEKAI, KojiSony Corporation ,  NAGAMINE, MasayukiSony Energytec Inc. ,  OMARU, AtsuoSony Energytec Inc. ,  SONOBE, Naohiro ,  MASUKO, Jiro ,  ISHIKAWA, Minoru

IPC分类号： H01M4/58

CPC分类号： H01M4/587 ,  H01M4/133 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M2004/021

摘要： A carbonaceous electrode having improved capacities for doping and dedoping of a cell active substance, such as lithium, and suitable for a non-aqueous solvent secondary battery, is constituted by a carbonaceous material having a true density as measured by a butanol substitution method of at most 1.46 g/cm3, a true density as measured by a helium substitution method of at least 1.7 g/cm3, a hydrogen-to-carbon atomic ratio H/C of at most 0.15 as measured according to elementary analysis, a BET specific surface area of at most 50 m2/g as measured by nitrogen adsorption BET method, and a carbon dioxide adsorption capacity of at least 10 ml/g. The carbonaceous material is advantageously produced by carbonizing an organic material originated from bamboo genera of family Gramineae, particularly genus Pleioblastus or Bambusa, at 1000 - 1400 °C under a reduced pressure or under a flowing inert gas stream to provide an appropriate porous structure.