公开(公告)号：US09174846B2

公开(公告)日：2015-11-03

申请号：US12885907

申请日：2010-09-20

申请人： Larry W. Beck ,  Mahrokh Soltani ,  Liya Wang

发明人： Larry W. Beck ,  Mahrokh Soltani ,  Liya Wang

IPC分类号： C01B15/16 ,  C01B25/26 ,  C01G1/00 ,  C01G49/00 ,  C01G51/00 ,  C01G53/00 ,  C22B1/00 ,  C22B23/00 ,  C01B25/37 ,  H01M4/136 ,  H01M4/58 ,  H01M10/052

CPC分类号： C01B25/375 ,  H01M4/136 ,  H01M4/5825 ,  H01M10/052 ,  Y02E60/122 ,  Y02P70/54

摘要： High-purity crystalline ferric phosphate material with desirable characteristics for use in synthesis of nano-sized LFP cathode material are described. The ferric phosphate dihydrate material has as disclosed herein has a molar ratio of phosphorous to iron is from about 1.001 to about 1.05, a surface area of from about 25 m2/g to about 65 m2/g, and is substantially free of metallic or magnetic impurities. Methods of synthesizing high-purity crystalline ferric phosphate material with desirable characteristics for use in synthesis of nano-sized LFP cathode material are also described. In some embodiments, one or more magnetic traps are used during the reaction process and/or after the formation of the final product to remove magnetic impurities. In some embodiments, a synthetic method of ferric phosphate using multiple steps is described, wherein the intermediate of the synthesis is isolated and purified to improve the purity of the ferric phosphate material. In some embodiments, an iron compound is added to an aqueous solution of phosphoric acid. The solution pH and temperature are controlled to ensure the complete dissolution of the iron compound. The desired iron phosphate crystalline material can be obtained with high purity and high crystalline phase purity by controlling the pH and temperature of the solution.

摘要翻译： 描述了用于合成纳米尺寸LFP阴极材料的具有期望特性的高纯度结晶磷酸铁材料。 如本文所公开的，磷酸铁二水合物材料的磷与铁的摩尔比为约1.001至约1.05，表面积为约25m 2 / g至约65m 2 / g，并且基本上不含金属或磁性 杂质。 还描述了合成用于纳米尺寸LFP阴极材料的合成的具有期望特性的高纯度结晶磷酸铁材料的方法。 在一些实施方案中，在反应过程中和/或形成最终产物之后使用一个或多个磁捕获器以除去磁性杂质。 在一些实施方案中，描述了使用多个步骤的磷酸铁的合成方法，其中分离和纯化合成的中间体以提高磷酸铁材料的纯度。 在一些实施方案中，将铁化合物加入到磷酸水溶液中。 控制溶液的pH和温度以确保铁化合物的完全溶解。 通过控制溶液的pH和温度可以获得具有高纯度和高结晶相纯度的所需磷酸铁晶体材料。

公开(公告)号：US20110068295A1

公开(公告)日：2011-03-24

申请号：US12885907

申请日：2010-09-20

申请人： Larry W. BECK ,  Mahrokh SOLTANI ,  Liya WANG

发明人： Larry W. BECK ,  Mahrokh SOLTANI ,  Liya WANG

IPC分类号： H01M4/88 ,  C01B25/37

CPC分类号： C01B25/375 ,  H01M4/136 ,  H01M4/5825 ,  H01M10/052 ,  Y02E60/122 ,  Y02P70/54

摘要： High-purity crystalline ferric phosphate material with desirable characteristics for use in synthesis of nano-sized LFP cathode material are described. The ferric phosphate dihydrate material has as disclosed herein has a molar ratio of phosphorous to iron is from about 1.001 to about 1.05, a surface area of from about 25 m2/g to about 65 m2/g, and is substantially free of metallic or magnetic impurities. Methods of synthesizing high-purity crystalline ferric phosphate material with desirable characteristics for use in synthesis of nano-sized LFP cathode material are also described. In some embodiments, one or more magnetic traps are used during the reaction process and/or after the formation of the final product to remove magnetic impurities. In some embodiments, a synthetic method of ferric phosphate using multiple steps is described, wherein the intermediate of the synthesis is isolated and purified to improve the purity of the ferric phosphate material. In some embodiments, an iron compound is added to an aqueous solution of phosphoric acid. The solution pH and temperature are controlled to ensure the complete dissolution of the iron compound. The desired iron phosphate crystalline material can be obtained with high purity and high crystalline phase purity by controlling the pH and temperature of the solution.

摘要翻译： 描述了用于合成纳米尺寸LFP阴极材料的具有期望特性的高纯度结晶磷酸铁材料。 如本文所公开的，磷酸铁二水合物材料的磷与铁的摩尔比为约1.001至约1.05，表面积为约25m 2 / g至约65m 2 / g，并且基本上不含金属或磁性 杂质。 还描述了合成用于纳米尺寸LFP阴极材料的合成的具有期望特性的高纯度结晶磷酸铁材料的方法。 在一些实施方案中，在反应过程中和/或形成最终产物之后使用一个或多个磁捕获器以除去磁性杂质。 在一些实施方案中，描述了使用多个步骤的磷酸铁的合成方法，其中分离和纯化合成的中间体以提高磷酸铁材料的纯度。 在一些实施方案中，将铁化合物加入到磷酸水溶液中。 控制溶液的pH和温度以确保铁化合物的完全溶解。 通过控制溶液的pH和温度可以获得具有高纯度和高结晶相纯度的所需磷酸铁晶体材料。