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    • 41. 发明授权
    • Electrodes comprising mixed active particles
    • 包含混合活性颗粒的电极
    • US07041239B2
    • 2006-05-09
    • US10406890
    • 2003-04-03
    • Jeremy BarkerM. Yazid SaidiTracy E. Kelley
    • Jeremy BarkerM. Yazid SaidiTracy E. Kelley
    • H01B1/08
    • H01M4/525H01M4/13H01M4/364H01M4/505H01M4/582H01M4/5825H01M10/0525
    • Electrode active materials comprising two or more groups of particles having differing chemical compositions, wherein each group of particles comprises a material selected from:(a) materials of the formula A1aM1b(XY4)cZd; and(b) materials of the formula A2eM2fOg; andwherein(i) A1, A2, and A3 are Li, Na, or K;(ii) M1 and M3 comprise a transition metal;(iv) XY4 a phosphate or similar moiety; and(v) Z is OH, or halogen.In a preferred embodiment, A2eM3fOg is A3hMniO4 having an inner and an outer region, wherein the inner region comprises a cubic spinel manganese oxide, and the outer region comprises a manganese oxide enriched in Mn+4 relative to the inner region. In a preferred embodiment, the compositions also comprise a basic compound.
    • 包含两组或更多组具有不同化学组成的颗粒的电极活性材料,其中每组颗粒包含选自以下的材料:(a)式A的材料 (XY 4)C 1 C 1 H 2 O 2(X 4) 和(b)式A的物质 >; 并且其中(i)A 1,A 2和A 3是Li,Na或K; (ii)M 1和M 3 3包含过渡金属; (iv)磷酸酯或类似部分的XY 4; 和(v)Z是OH或卤素。 在一个优选的实施方案中,A 2和A 3是C 具有内部和外部区域的内部区域包括立方尖晶石 锰氧化物,外部区域包含相对于内部区域富含Mn + 4+的氧化锰。 在优选的实施方案中,组合物还包含碱性化合物。
    • 50. 发明授权
    • Stabilized electrochemical cell
    • 稳定电化学电池
    • US5869207A
    • 1999-02-09
    • US762081
    • 1996-12-09
    • M. Yazid SaidiChariclea Scordilis-KelleyJeremy Barker
    • M. Yazid SaidiChariclea Scordilis-KelleyJeremy Barker
    • C01G45/00H01M4/50H01M4/505H01M4/62H01M10/0525H01M10/0567H01M10/36
    • H01M4/505C01G45/1221C01G45/1242H01M10/0567H01M4/62C01P2006/40H01M10/0525
    • The present invention provides a novel composition and method for preventing decomposition of one or more electrochemical cell components comprising an electrode having an active material, and an electrolyte. The method of the invention, for the first time, effectively overcomes problems which arise between the interaction of cell components and contaminate water retained in a cell. Such contaminate water reacts with the electrolyte which comprises a salt of lithium in a solvent. Solubilizing of the salt in solution with attendant interaction between the salt and water causes formation of hydrogen-containing acids. The method of the invention effectively blocks decomposition of a lithium metal oxide cathode active material, and particularly lithium manganese oxide (LMO, nominally LiMn.sub.2 O.sub.4). Such decomposition is prevented by including in the cell a basic compound which forms an electron donor species in the electrolyte solution; and by neutralizing at least a portion of the acid by reacting the donor species with the hydrogen-containing acids thereby preventing decomposition of the lithium manganese oxide by the acid. The preservation of the lithium manganese oxide prevents degradation of other cell components by other mechanism.
    • 本发明提供一种用于防止一种或多种电化学电池元件分解的新型组合物和方法,所述电化学电池组件包括具有活性材料的电极和电解质。 本发明的方法第一次有效地克服了细胞成分的相互作用和污染细胞中残留的水之间产生的问题。 这种污染水与包含锂在溶剂中的盐的电解质反应。 溶解盐中的盐与盐和水之间伴随的相互作用引起含氢酸的形成。 本发明的方法有效地阻止锂金属氧化物正极活性物质,特别是锰酸锂(LMO,名义上是LiMn 2 O 4)的分解。 通过在电解液中包含在电解质溶液中形成电子供体物质的碱性化合物来防止这种分解; 并且通过使供体物质与含氢酸反应从而中和酸的至少一部分,从而防止酸分解锰酸锂。 锂锰氧化物的保存通过其他机理防止其他电池组分的降解。