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    OPTIMIZATION OF CARBON COATINGS
    1.
    发明申请
    OPTIMIZATION OF CARBON COATINGS 审中-公开
    碳涂料的优化

    公开(公告)号：US20090183650A1

    公开(公告)日：2009-07-23

    申请号：US12302476

    申请日：2007-06-12

    申请人： Marca M. Doeff ,  James D. Wilcox ,  Robert Kostecki ,  Grace Y. Lau

    发明人： Marca M. Doeff ,  James D. Wilcox ,  Robert Kostecki ,  Grace Y. Lau

    IPC分类号： C09D1/00 ,  B05D5/12

    CPC分类号： C01B25/45 ,  H01M4/136 ,  H01M4/366 ,  H01M4/5825

    摘要： Several synthetic additives have been used to improve the carbon coatings on LiFePO4 electrode materials. Pyromellitic acid (PA) added prior to calcination decreases the D/G ratios of the carbon produced in situ, while the use of both iron nitrate and PA results in increased sp2 character. Thus, the carbon coatings are structured with a greater fraction of graphitic character. The production of structured carbon coatings results in higher pressed pellet conductivities of LiFePO4/C composites and improved electrochemical performance of cells containing these cathode materials, although the carbon content is not necessarily increased. The combination of both ferrocene and PA used during LiFePO4 synthesis causes more carbon to be retained, although the structural characteristics are similar to that produced from the same amount of PA alone.

    摘要翻译： 已经使用几种合成添加剂来改善LiFePO 4电极材料上的碳涂层。 煅烧前添加的均苯四酸（PA）降低了原位产生的碳的D / G比，而使用硝酸铁和PA也增加了sp2特性。 因此，碳涂层被构造成具有较大分数的石墨性质。 结构化碳涂层的生产导致LiFePO 4 / C复合材料的较高的压片导电率和提高含有这些阴极材料的电池的电化学性能，尽管碳含量不一定增加。 在LiFePO 4合成中使用的二茂铁和PA的组合导致更多的碳被保留，尽管其结构特征类似于仅由相同量的PA产生的结构特征。

    Aluminum Substituted Mixed Transition Metal Oxide Cathode Materials for Lithium Ion Batteries
    2.
    发明申请
    Aluminum Substituted Mixed Transition Metal Oxide Cathode Materials for Lithium Ion Batteries 审中-公开
    用于锂离子电池的铝取代的混合过渡金属氧化物阴极材料

    公开(公告)号：US20110291043A1

    公开(公告)日：2011-12-01

    申请号：US13119703

    申请日：2009-09-23

    申请人： James D. Wilcox ,  Marca M. Doeff

    发明人： James D. Wilcox ,  Marca M. Doeff

    IPC分类号： H01M4/525

    CPC分类号： H01M4/505 ,  H01M4/131 ,  H01M4/485 ,  H01M4/525 ,  H01M10/0525

    摘要： A mixed transition metal oxide is provided described wherein Aluminum is partially substituted for Cobalt in a Li[NixCoyMnz]O2 composition wherein the resulting aluminum substituted product Li[Ni0.4Co0.2-yAlyMn0.4]O2 is less costly than the parent product, is safer to use, and provides enhanced electrochemical performance as a cathode material for use in Lithium-ion based batteries.

    摘要翻译： 提供了一种混合的过渡金属氧化物，其中铝在Li [NixCoyMnz] O 2组合物中部分地代替钴，其中所得的铝取代产物Li [Ni0.4Co0.2-yAlyMn0.4] O2比母体产品成本低， 使用更安全，并且提供作为用于锂离子电池的阴极材料的增强的电化学性能。