公开(公告)号：EP2349925B1

公开(公告)日：2012-03-21

申请号：EP09752748.5

申请日：2009-11-10

申请人： Rockwood Italia SpA ,  Politecnico Di Torino

发明人： BODOARDO, Silvia ,  GERBALDI, Claudio ,  MELIGRANA, Giuseppina ,  DI LUPO, Francesca ,  PENAZZI, Nerino ,  FONTANA, Daniela

IPC分类号： C01B25/45 ,  H01M4/58 ,  H01M10/0525 ,  H01M4/136

CPC分类号： H01M4/136 ,  C01B25/45 ,  H01M4/1397 ,  H01M4/5825 ,  H01M10/0525 ,  Y02E60/122 ,  Y02P70/54

摘要： The present invention relates to a process for the production of LiFePO4 powder, comprising the steps: a) providing an aqueous solution of an organic surfactant; b) providing an aqueous solution of an iron (II) salt and mixing said aqueous iron (II) salt solution with an aqueous solution of a phosphate, to provide a mixed iron (II) salt/phosphate solution having a stoichiometric ratio of Fe2+:phosphate of about 1 : 1; c) adding the mixed iron (II) salt/phosphate solution to the surfactant solution under constant stirring; d) providing an aqueous solution comprising a lithium salt, adding said aqueous solution comprising a lithium salt to said mixed iron (II) salt/phosphate solution to provide a mixture having a stoichiometric ratio of Fe2+:phosphate:lithium salt of about 1 :1 :3 and stirring the resulting mixture; e) heating the resulting mixture at 80-200 °C; f) washing the resulting precipitate to remove excess surfactant, filtering and drying the precipitate; and g) heat treating the dried precipitate in an inert atmosphere by firing at 550-850 °C for at least 2 hours, wherein a co-solvent is added during or after any one of steps (a) to (d).

公开(公告)号：EP2349925A1

公开(公告)日：2011-08-03

申请号：EP09752748.5

申请日：2009-11-10

申请人： Rockwood Italia SpA ,  Politecnico Di Torino

发明人： BODOARDO, Silvia ,  GERBALDI, Claudio ,  MELIGRANA, Giuseppina ,  DI LUPO, Francesca ,  PENAZZI, Nerino ,  FONTANA, Daniela

IPC分类号： C01B25/45 ,  H01M4/58 ,  H01M10/0525 ,  H01M4/136

CPC分类号： H01M4/136 ,  C01B25/45 ,  H01M4/1397 ,  H01M4/5825 ,  H01M10/0525 ,  Y02E60/122 ,  Y02P70/54

摘要： The present invention relates to a process for the production of LiFePO
4 powder, comprising the steps: a) providing an aqueous solution of an organic surfactant; b) providing an aqueous solution of an iron (II) salt and mixing said aqueous iron (II) salt solution with an aqueous solution of a phosphate, to provide a mixed iron (II) salt/phosphate solution having a stoichiometric ratio of Fe
2+ :phosphate of about 1 : 1; c) adding the mixed iron (II) salt/phosphate solution to the surfactant solution under constant stirring; d) providing an aqueous solution comprising a lithium salt, adding said aqueous solution comprising a lithium salt to said mixed iron (II) salt/phosphate solution to provide a mixture having a stoichiometric ratio of Fe
2+ :phosphate:lithium salt of about 1 :1 :3 and stirring the resulting mixture; e) heating the resulting mixture at 80-200 °C; f) washing the resulting precipitate to remove excess surfactant, filtering and drying the precipitate; and g) heat treating the dried precipitate in an inert atmosphere by firing at 550-850 °C for at least 2 hours, wherein a co-solvent is added during or after any one of steps (a) to (d).