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    • 1. 发明申请
    • CATHODE MATERIALS FOR LITHIUM ION ACCUMULATORS BASED ON LITHIATED VANADIUM OXIDE COMPOUNDS
    • 基于立方氧化钒化合物的锂离子蓄电池的阴极材料
    • WO2011034508A1
    • 2011-03-24
    • PCT/SI2010/000045
    • 2010-07-30
    • KEMIJSKI INŠTITUTBELE, MarjanDOMINKO, RobertVIDAL-ABRACA GARRIDO, CandelaPIVKO, MajaGABERŠČEK, Miran
    • BELE, MarjanDOMINKO, RobertVIDAL-ABRACA GARRIDO, CandelaPIVKO, MajaGABERŠČEK, Miran
    • H01M4/485H01M4/131C01G23/00C01G31/02H01M10/052
    • H01M4/485C01G31/006C01P2002/72C01P2006/40H01M4/131H01M10/052
    • The invention relates to novel active cathode materials, to their use, and to a process for the manufacture of active electrode materials in the field of lithium ion accumulators based on lithium vanadium oxide stabilized with titanium or aluminum, exhibiting a layered structure. The active electrode materials are represented by the general chemical formula Li x V M O 4 , wherein typically x=2, and M stands preferably for titanium or aluminum. The invention describes the useful electrochemical activity of Li 2 VTiO 4 and Li 2 VAIO 4 , which are compounds having a layered structure, as cathode material in lithium ion accumulators, enabling the reversible exploitation of the electrochemical energy stored in the said compounds within the potential window 1 - 4.6V with respect to metallic lithium. The invention relates to the process for the manufacture of the said compounds based on the homogenization of the lithium, vanadium, titanium, and aluminum precursors, respectively, in an aqueous medium or in a non-aqueous medium, in the presence of organic acids and/or nonionic dispergators. The obtained dispersion of the precursors is after homogenization dried and thermally treated in an inert atmosphere or in a reductive atmosphere. The products are particles having a chemical composition Li x V M O 4 , and are preferably coated with an electron conductive phase wherein the X-ray powder diffraction analysis corresponds to the layered structure.
    • 本发明涉及新型的活性阴极材料及其用途,以及用于制造基于用钛或铝稳定的锂钒氧化物的锂离子蓄电池领域中的活性电极材料的方法,其呈现分层结构。 活性电极材料由一般化学式LixVMO4表示,其中通常x = 2,M优选用于钛或铝。 本发明描述了具有层状结构的化合物的Li2VTiO4和Li2VAIO4作为锂离子蓄电池中的阴极材料的有用的电化学活性,使得能够可逆地利用储存在所述化合物中的电化学能在潜在的窗口1〜4.6V内, 尊重金属锂。 本发明涉及在有机酸存在下,分别在水性介质或非水介质中均匀化锂,钒,钛和铝前体的方法来制备所述化合物,以及 /或非离子分解剂。 所获得的前体分散体在均化后干燥并在惰性气氛或还原气氛中进行热处理。 该产品是具有化学组成为LixVMO4的颗粒,并且优选地涂覆有电子传导相,其中X射线粉末衍射分析对应于层状结构。
    • 2. 发明申请
    • A TWO-STEP SYNTHESIS METHOD FOR THE PREPARATION OF COMPOSITES OF INSERTION ACTIVE COMPOUNDS FOR LITHIUM-ION BATTERIES
    • 用于制备锂离子电池插入活性化合物复合材料的两步合成方法
    • WO2012039687A1
    • 2012-03-29
    • PCT/SI2011/000050
    • 2011-09-19
    • KEMIJSKI INŠTITUTBELE, MarjanDOMINKO, RobertPIVKO, MajaGABERŠČEK, Miran
    • BELE, MarjanDOMINKO, RobertPIVKO, MajaGABERŠČEK, Miran
    • C01G1/02C01G45/00C01G49/00H01M4/58H01M4/62H01M10/052H01M4/02
    • H01M4/5825C01G45/1235C01G45/1242C01G49/009C01G51/006C01P2002/72C01P2004/61H01M4/136H01M4/625H01M10/052H01M2004/021
    • The invention refers to a two-step synthesis method for the preparation of equally distributed particles of insertion active compounds for lithium-ion batteries. In the first step a modified sol-gel method is used to prepare nanoparticles of a precursor without lithium in a porous matrix of a carbon film. The first step of the synthesis method comprises sol preparation, gelling, drying and thermal treatment in a selected atmosphere. The precursor obtained in the first step is then ground with a compound, which is a source of lithium, in stoichiometric ratio and after a solid-state reaction thermally treated in a selected temperature interval. The product so obtained is crystallographically pure, equally sized particles of insertion active compounds (LiMP0 4 , Li 2 MSi0 4 , LiMB0 3 and mixed oxides of transition metals having a general formula Li y MX04, wherein M = Mn, Fe, Co and Ni, X=Ti and Al and y=1-3), which particles, after having been subjected to synthesis, are equally distributed in a porous carbon matrix, which ensures adequate conditions for their use in lithium-ion batteries. The synthesis conditions in the first step (used precursors, precursor concentration, type of gelling and time of gel ageing, temperature and time of thermal treatment, quantity of used organic phase, thermal treatment atmosphere) have influence on the size of insertion compounds, on their distribution and on the quantity of the carbon phase.
    • 本发明涉及用于制备用于锂离子电池的插入活性化合物的均匀分布的颗粒的两步合成方法。 在第一步中,使用改性的溶胶 - 凝胶法在碳膜的多孔基体中制备无锂的前体的纳米颗粒。 合成方法的第一步包括在选择的气氛中的溶胶制备,胶凝,干燥和热处理。 然后将第一步骤中获得的前体用化学计量比的化合物(其为锂源)研磨,并在固态反应在选定的温度区间内进行热处理。 如此获得的产物是晶体学上纯的,等尺寸的插入活性化合物(LiMP04,Li2Mi04,LiMB03以及具有通式LiyMX04的过渡金属的混合氧化物,其中M = Mn,Fe,Co和Ni,X = Ti和Al)和 y = 1-3),经过合成后的颗粒均匀地分布在多孔碳基质中,这确保了它们在锂离子电池中使用的足够条件。 第一步的合成条件(使用的前体,前体浓度,胶凝时间,凝胶老化时间,热处理温度和时间,使用的有机相的量,热处理气氛)对插入化合物的大小有影响, 它们的分布和碳相的数量。