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    • 53. 发明授权
    • Battery active materials and methods for synthesis
    • 电池活性物质和合成方法
    • US07901810B2
    • 2011-03-08
    • US10848452
    • 2004-05-17
    • Jeremy BarkerM. Yazid SaidiJeffrey Swoyer
    • Jeremy BarkerM. Yazid SaidiJeffrey Swoyer
    • H01M4/58H01M4/88H01M4/00
    • C01B25/37H01M4/5825H01M10/0525
    • Active materials for rechargeable batteries have a general formula Aa(MO)bM′cXO4 where A represents an alkali metal or mixture of alkali metals, a is greater than about 0.1 and less than or equal to about 2; MO is an ion containing a transition metal M not in its highest oxidation state, M′ represents a metal, or mixture of metals, and b is greater than 0 and less than or equal to about 1, c is less than 1 wherein a, b and c are selected so as to maintain the electroneutrality of the compound, and X is phosphorus, arsenic, or sulfur, or mixtures thereof. Preferred active materials are alkali metal vanadyl metal phosphates of general formula Aa(VO)bM′cPO4 where a and b are both greater than 0 and c may be zero or greater. New synthetic routes are provided to alkali metal mixed metal phosphates where at least one of the starting materials is a metal-oxo group (MO)3+, where M represents a metal in a +5 oxidation state. Reductive methods are provided for reacting a metal-oxo phosphate with an alkali metal compound in the presence of reducing carbon. The carbothermal reduction step can for example result in the reduction of a +5 metal to a +4 state or lower.
    • 用于可再充电电池的活性材料具有通式Aa(MO)bM'cXO4,其中A表示碱金属或碱金属的混合物,a大于约0.1且小于或等于约2; MO是含有不处于其最高氧化态的过渡金属M的离子,M'表示金属或金属的混合物,b大于0且小于或等于约1,c小于1,其中a, 选择b和c以保持化合物的电中性,X是磷,砷或硫,或其混合物。 优选的活性物质是通式为Aa(VO)bM'cPO4的碱金属氧钒基金属磷酸盐,其中a和b都大于0,c可以为零或更大。 向碱金属混合金属磷酸盐提供新的合成路线,其中至少一种原料是金属 - 氧代基(MO)3+,其中M表示+5氧化态的金属。 提供还原方法,用于在还原性碳存在下使金属 - 氧代磷酸酯与碱金属化合物反应。 碳热还原步骤可以例如将+5金属还原成+4状态或更低。
    • 60. 发明授权
    • Stabilized electrochemical cell active material
    • 稳定的电化学电池活性材料
    • US06869547B2
    • 2005-03-22
    • US09974043
    • 2001-10-09
    • Jeremy BarkerM. Yazid SaldiJeffrey L. Swoyer
    • Jeremy BarkerM. Yazid SaldiJeffrey L. Swoyer
    • C01G45/00C01G45/12H01M4/50H01M4/505H01M4/62H01M10/0525H01M10/0567H01M10/36H01M4/02
    • H01M4/505C01G45/1242C01G45/125C01G45/1257C01P2002/32C01P2002/72C01P2002/77C01P2004/80C01P2004/84C01P2006/12C01P2006/40H01M4/62H01M10/0525H01M10/0567
    • Stabilized lithiated manganese oxide (LMO) is prepared by reacting cubic spinel lithium manganese oxide particles and particles of an alkali metal compound in air for a time and at a temperature sufficient to decompose at least a portion of the alkali metal compound, providing a treated lithium manganese oxide. The reaction product is characterized as particles having a core or bulk structure of cubic spinel lithium manganese oxide and a surface region which is enriched in Mn+4 relative to the bulk. X-ray diffraction data and x-ray photoelectron spectroscopy data are consistent with the structure of the stabilized LMO being a central bulk of cubic spinel lithium manganese oxide with a surface layer or region comprising A2MnO3, where A is an alkali metal. Electrochemical cells containing the stabilized LMO of the invention have improved charging and discharging characteristics and maintain integrity over a prolonged life cycle. The electrochemical cells are stabilized against decomposition of cell components, including electrode and electrolyte components.
    • 通过使立方尖晶石锂锰氧化物颗粒和碱金属化合物颗粒在空气中反应一段时间并在足以分解至少一部分碱金属化合物的温度下制备稳定的锂化锰氧化物(LMO),从而提供处理过的锂 氧化锰。 反应产物的特征在于具有立方尖晶石锂锰氧化物的核心或体积结构的颗粒和相对于体积富含Mn +4的表面区域。 X射线衍射数据和X射线光电子能谱数据与稳定的LMO的结构一致,稳定的LMO是具有包含A2MnO3的表面层或区域的立方尖晶石锂锰氧化物的中心体,其中A是碱金属。 包含本发明的稳定的LMO的电化学电池具有改善的充电和放电特性并且在延长的寿命周期内保持完整性。 电化学电池被稳定以防止细胞成分的分解,包括电极和电解质组分。