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    • 17. 发明授权
    • Electroactive material for secondary batteries and methods of preparation
    • 二次电池用电极材料及其制备方法
    • US06599662B1
    • 2003-07-29
    • US09479154
    • 2000-01-07
    • Yet-Ming ChiangGerbrand CederPimpa Limthongkul
    • Yet-Ming ChiangGerbrand CederPimpa Limthongkul
    • H01M458
    • C01G3/00C01B3/001C01G23/00C01G31/00C01G37/00C01G45/1221C01G45/1235C01G45/1242C01G49/00C01G51/00C01P2002/32C01P2002/34C01P2002/50C01P2002/72C01P2004/03C01P2004/04C01P2006/40H01M4/36H01M4/364H01M4/383H01M4/485H01M6/40H01M2004/027Y02E60/324
    • This invention provides a composite material for use as an electrode in electrochemical devices. An electroactive composite material includes a first electroactive metal, the electroactive material including a phase enriched in a metal or metal alloy, MeI, capable of intercalating or alloying with a species selected from the group consisting of alkali metals and hydrogen, and a second material having the first active material intimately mixed therein. The second material includes a metal oxide, MeyIIOz, wherein the metals MeI have a less negative Gibbs free energy for alloying or compound formation with oxygen than the metals that comprise MeIIO. The materials of the invention comprise a first material that is an elemental metal, metal alloy, metal oxide, or other metal compound, selected so that it is able to alloy with lithium, and prepared in a dispersed one-, two- or three-dimensional form. The first material is intimately mixed with or dispersed within a second material that may be substantially conductive to electrons or electron holes or lithium ions. The composite material may be prepared by a process known as “partial reduction” or “internal reduction,” in which a precursor to the first material is preferentially reduced, or the process known as “partial oxidation,” in which a precursor to the second material is preferentially oxidized.
    • 本发明提供一种用作电化学装置中的电极的复合材料。 电活性复合材料包括第一电活性金属,所述电活性材料包括富含金属或金属合金的相,能够与选自碱金属和氢的物质嵌入或合金化的MeI,以及具有 第一活性物质在其中密切混合。 第二种材料包括金属氧化物MeyIIOz,其中金属MeI具有比包含MeIIO的金属更少的负Gibbs自由能来合金化或与氧形成化合物。 本发明的材料包括第一种材料,它是元素金属,金属合金,金属氧化物或其它金属化合物,其选择为能够与锂合金,并且以分散的一,二或三维制备, 三维形式。 第一种材料与可能对电子或电子空穴或锂离子基本上导电的第二种材料紧密混合或分散。 复合材料可以通过称为“部分还原”或“内部还原”的方法制备,其中第一种材料的前体优先被还原,或称为“部分氧化”的方法,其中第二种 材料被优先氧化。