公开(公告)号：EP2636649A4

公开(公告)日：2015-07-29

申请号：EP11837945

申请日：2011-10-28

申请人： UNIV TOKYO SCI EDUC FOUND

发明人： YABUUCHI NAOAKI ,  KOMABA SHINICHI ,  IWATATE JUNICHI

IPC分类号： C01G49/00 ,  C01D1/02 ,  C01G45/12 ,  H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M10/054

CPC分类号： H01M4/505 ,  C01D1/02 ,  C01G45/1228 ,  C01G49/0072 ,  C01P2002/54 ,  C01P2002/72 ,  H01M4/364 ,  H01M4/525 ,  H01M10/054 ,  Y02E60/122 ,  Y02P70/54

摘要： Provided are: a composite metal oxide with which it is possible to improve the performances of a sodium secondary battery; a process for producing the composite metal oxide; a positive active material which comprises the composite metal oxide; a positive electrode produced using the positive active material; and a sodium secondary battery equipped with the positive electrode. The composite metal oxide is represented by formula (I) and is configured of an oxide having a P2 structure and a lamellar oxide having an octahedral structure and/or a triangular-prism structure, which each functions as a stacking fault. The lamellar oxide preferably is an oxide having an 03 structure.