公开(公告)号：EP2277828B1

公开(公告)日：2018-08-08

申请号：EP09727078.9

申请日：2009-03-26

申请人： Toda Kogyo Corp.

发明人： MISHIMA, Yuji ,  HONDA, Shingo ,  KONO, Yoshiteru ,  SATO, Kouta ,  OKAZAKI, Seiji ,  KATAMOTO, Tsutomu

IPC分类号： C01B25/45 ,  H01M4/02 ,  H01M4/58

CPC分类号： H01M4/5825 ,  C01B25/45

摘要： The present invention relates to a process for producing lithium iron phosphate particles having an olivine type structure, comprising a first step of mixing an iron oxide or an iron oxide hydroxide as an iron raw material which comprises at least one element selected from the group consisting of Na, Mg, Al, Si, Cr, Mn and Ni in an amount of 0.1 to 2 mol% for each element based on Fe, and a carbon element C in an amount of 5 to 10 mol% based on Fe, and has a content of Fe 2+ of not more than 40 mol% based on an amount of Fe and an average primary particle diameter of 5 to 300 nm, with a lithium raw material and a phosphorus raw material; a second step of controlling agglomerates diameter in the resulting mixture is 0.3 to 5.0 µm; and a third step of sintering the mixture obtained in the second step in an inert gas or reducing gas atmosphere having an oxygen concentration of not more than 0.1% at a temperature of 250 to 750°C.

公开(公告)号：EP2314545B1

公开(公告)日：2018-03-07

申请号：EP09725552.5

申请日：2009-03-26

申请人： Toda Kogyo Corp.

发明人： KOBINO, Masashi ,  FUJITA, Katsuhiro ,  OKAZAKI, Seiji ,  HONDA, Tomohiro ,  NISHIO, Takahisa ,  FUJIMOTO, Ryota ,  HIRAMOTO, Toshiaki ,  SATO, Kouta ,  ITO, Akino ,  OKINAKA, Kenji ,  FUJINO, Shoichi ,  NISHIMOTO, Kazushi ,  UEGAMI, Masayuki ,  MORITA, Daisuke ,  KAJIYAMA, Akihisa

IPC分类号： C01G51/04 ,  H01M4/52

CPC分类号： C01G51/04 ,  C01G51/42 ,  C01P2002/52 ,  C01P2002/60 ,  C01P2002/72 ,  C01P2002/88 ,  C01P2004/03 ,  C01P2004/51 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2006/10 ,  C01P2006/11 ,  C01P2006/12 ,  C01P2006/40 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/485 ,  H01M4/525 ,  H01M10/052

摘要： The present invention relates to cobalt oxyhydroxide particles and lithium cobaltate particles which have a high density and a uniformly grown crystal structure. These objects of the present invention can be achieved by cobalt oxyhydroxide particles having an average secondary particle diameter (D50) of 3.0 to 25.0 µm, a BET specific surface area (BET) of 0.1 to 20.0 m 2 /g, a tap density (TD) of 1.0 to 3.5 g/cm 3 in which the average secondary particle diameter (D50) and the BET specific surface area (BET) of the cobalt oxyhydroxide particles satisfy the relational formula; and by lithium cobaltate particles having an average secondary particle diameter (D50) of 15.0 to 25.0 µm, a specific surface area (BET) of 0.10 to 0.30 m 2 /g, a compressed density (CD; as measured by applying a pressure of 2.5 t/cm 2 thereto) of 3.65 to 4.00 g/cm 3 . The cobalt oxyhydroxide particles are useful as a precursor of a positive electrode active substance (lithium cobaltate particles) used in a non-aqueous electrolyte secondary battery, and the lithium cobaltate particles are useful as a the positive electrode active substance used in a non-aqueous electrolyte secondary battery.