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    FERRIC PHOSPHATE AND METHODS OF PREPARATION THEREOF
    3.
    发明公开
    FERRIC PHOSPHATE AND METHODS OF PREPARATION THEREOF 审中-公开

    公开(公告)号：EP4112543A1

    公开(公告)日：2023-01-04

    申请号：EP22192037.4

    申请日：2010-09-20

    申请人： A123 Systems, LLC

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

    IPC分类号： C01B25/37 ,  C01B25/45 ,  H01M4/58

    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 m2jg to about 65 m2jg, 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.

    MIXED METAL OLIVINE ELECTRODE MATERIALS FOR LITHIUM ION BATTERIES
    10.
    发明公开
    MIXED METAL OLIVINE ELECTRODE MATERIALS FOR LITHIUM ION BATTERIES 审中-公开
    微电子 - 锂离子电池

    公开(公告)号：EP2238637A4

    公开(公告)日：2016-08-03

    申请号：EP09701906

    申请日：2009-01-21

    申请人： A123 SYSTEMS LLC

    发明人： BECK LARRY ,  PULLEN ANTHONY E ,  XU CHUANJING ,  WANG LIYA ,  SHOLTES PHILLIP

    IPC分类号： C01B25/30 ,  C01B25/45 ,  H01M4/58 ,  H01M10/052 ,  H01M10/36

    CPC分类号： H01M4/5825 ,  C01B25/45 ,  H01M10/052 ,  Y02T10/7011

    摘要： A positive electrode material is provided including an electroactive material having one or more phases comprising lithium (Li), an electroactive metal (M), and phosphate (PO4), wherein in the fully lithiated state, the overall composition has a ratio of Li:M ranging from greater than about 1.0 to about 1.3, a ratio of (PO4):M ranging from about 1.0 to about 1.132, M is one or more metals selected from the group consisting of Cr, Mn, Fe, Co, and Ni, and at least one phase includes an olivine lithium electroactive metal phosphate. In some instances, a composite cathode material including an electroactive olivine transition metal phosphate and a lithium and phosphate rich secondary phase is disclosed for use in a lithium ion battery.

    摘要翻译： 提供一种正极材料，其包括具有一种或多种锂（Li），电活性金属（M）和磷酸盐（PO4）的一种或多种相的电活性材料，其中，在完全锂化状态下，整体组合物的Li： M的范围为大于约1.0至约1.3，（PO 4）：M的范围为约1.0至约1.132，M为选自Cr，Mn，Fe，Co和Ni中的一种或多种金属， 并且至少一相包括橄榄石锂电活性金属磷酸盐。 在一些情况下，公开了一种用于锂离子电池的复合阴极材料，其包括电活性橄榄石过渡金属磷酸盐和富含锂和磷酸盐的第二相。