公开(公告)号：US20090252668A1

公开(公告)日：2009-10-08

申请号：US12176319

申请日：2008-07-18

申请人： Wenyu Cao ,  Shuiyuan Zhang ,  Feng Xiao

发明人： Wenyu Cao ,  Shuiyuan Zhang ,  Feng Xiao

IPC分类号： C01B25/30

CPC分类号： C01B25/45 ,  H01M4/5825 ,  H01M10/052

摘要： Methods for preparing iron source material and ferrous oxalate for lithium ferrous phosphate are disclosed. One method comprises bringing solution containing ferrite and soluble non-ferrous metal salts in contact with oxalate solution; wherein said method of contact is to allow a flow of the ferrite solution containing ferrite and soluble non-ferrous metal salts to come in contact with a flow of oxalate solution. Another method comprises brings a stream of ferrite solution in contact with a stream of oxalate solution, wherein the flow rates of the ferrite solution and oxalate solution give the resulting slurry a pH of 2-6. The ferrous oxalate particles produces by the methods of the present invention are regularly shaped and have small and evenly distributed diameters. Lithium ferrous phosphate made from iron source material and ferrous oxalate prepared using the methods of the present invention has small particle diameter, homogeneous particle size, good electrical conductivity, and superior electrochemical properties.

摘要翻译： 公开了用于制备磷酸亚铁的铁源材料和草酸亚铁的方法。 一种方法包括将含铁素体和可溶性有色金属盐的溶液与草酸盐溶液接触; 其中所述接触方法是允许含有铁素体和可溶性有色金属盐的铁素体溶液与草酸溶液流接触。 另一种方法包括使铁酸盐溶液与草酸溶液流接触，其中铁酸盐溶液和草酸溶液的流速使得到的浆料的pH为2-6。 通过本发明的方法生产的草酸亚铁颗粒是规则形状的并且具有小且均匀分布的直径。 由本发明方法制备的由铁源材料和草酸亚铁制成的磷酸亚铁锂具有粒径小，粒径均匀，导电性好，电化学性能优异的特点。

公开(公告)号：US20090148765A1

公开(公告)日：2009-06-11

申请号：US12254537

申请日：2008-10-20

申请人： WENYU CAO ,  SHUIYUAN ZHANG ,  NANJIANG LIU ,  ZHANFENG JIANG

发明人： WENYU CAO ,  SHUIYUAN ZHANG ,  NANJIANG LIU ,  ZHANFENG JIANG

IPC分类号： H01M4/58 ,  H01M2/02

CPC分类号： H01M4/136 ,  H01M4/5825 ,  H01M4/625 ,  H01M10/0525 ,  H01M2004/021

摘要： Lithium iron(II) phosphate containing cathode active material having lithium iron(II) phosphate particles and nano-carbons and methods of preparation thereof. In addition, the cathode active material includes iron phosphide and can be prepared under an inert atmosphere and sintered at high temperatures. The material mixture includes lithium compound, iron compound, organic carbon, phosphorous and nano-iron particles resulting in an electrode with higher unit capacity and maintenance rate.

摘要翻译： 含有磷酸铁锂（II）的磷酸铁锂（II）的磷酸铅颗粒和纳米碳及其制备方法。 此外，阴极活性材料包括磷化铁，并且可以在惰性气氛下制备并在高温下烧结。 材料混合物包括锂化合物，铁化合物，有机碳，磷和纳米铁颗粒，导致具有更高单位容量和维持率的电极。