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    • 52. 发明授权
    • Lithium secondary cell with high charge and discharge rate capability
    • 具有高充放电能力的锂二次电池
    • US07261979B2
    • 2007-08-28
    • US11076556
    • 2005-03-09
    • Antoni S. GozdzAndrew C. ChuYet Ming ChiangGilbert N. Riley, Jr.
    • Antoni S. GozdzAndrew C. ChuYet Ming ChiangGilbert N. Riley, Jr.
    • H01M4/58
    • H01M10/0525H01M4/13H01M4/133H01M4/136H01M4/5825H01M4/583H01M4/587H01M10/0587H01M2004/021H01M2010/4292
    • A high capacity, high charge rate lithium secondary cell includes a high capacity lithium-containing positive electrode in electronic contact with a positive electrode current collector, said current collector in electrical connection with an external circuit, a high capacity negative electrode in electronic contact with a negative electrode current collector, said current collector in electrical connection with an external circuit, a separator positioned between and in ionic contact with the cathode and the anode, and an electrolyte in ionic contact with the positive and negative electrodes, wherein the total area specific impedance for the cell and the relative area specific impedances for the positive and negative electrodes are such that, during charging at greater than or equal to 4C, the negative electrode potential is above the potential of metallic lithium. The current capacity per unit area of the positive and negative electrodes each are at least 3 mA-h/cm2, the total area specific impedance for the cell is less than about 20 Ω-cm2, and the positive electrode has an area specific impedance r1 and the negative electrode has an area specific impedance r2, and wherein the ratio of r1 to r2 is at least about 10.
    • 高容量高电荷率锂二次电池包括与正极集电体电接触的高容量含锂正极,所述集电体与外部电路电连接,与 负极集电器,所述集电器与外部电路电连接,位于阴极和阳极之间并与阴极和阳极离子接触的分离器,以及与正极和负极离子接触的电解质,其中总面积比阻抗 对于电池和正极和负极的相对面积比阻抗使得在大于或等于4C的充电期间,负极电位高于金属锂的电位。 正极和负极每单位面积的电流容量至少为3mA-h / cm 2,电池的总面积比阻抗小于约20Ω·cm〜 2,并且正电极具有面积比阻抗r 1,并且负极具有面积比阻抗r 2 2,并且其中r < SUB> 1 至r 2 2是至少约10。
    • 54. 发明授权
    • Torsional texturing of superconducting oxide composite articles
    • US06360425B1
    • 2002-03-26
    • US08302601
    • 1994-09-08
    • Craig John ChristophersonGilbert N. Riley, Jr.John Scudiere
    • Craig John ChristophersonGilbert N. Riley, Jr.John Scudiere
    • H01L3924
    • H01L39/248Y10T29/49014
    • A method of texturing a multifilamentary article having filaments comprising a desired oxide superconductor or its precursors by torsionally deforming the article is provided. The texturing is induced by applying a torsional strain which is at least about 0.3 and preferably at least about 0.6 at the surface of the article, but less than the strain which would cause failure of the composite. High performance multifilamentary superconducting composite articles having a plurality of low aspect ratio, twisted filaments with substantially uniform twist pitches in the range of about 1.00 inch to 0.01 inch (25 to 0.25 mm), each comprising a textured desired superconducting oxide material, may be obtained using this texturing method. If tighter twist pitches are desired, the article may be heat treated or annealed and the strain repeated as many times as necessary to obtain the desired twist pitch. It is preferred that the total strain applied per step should be sufficient to provide a twist pitch tighter than 5 times the diameter of the article, and twist pitches in the range of 1 to 5 times the diameter of the article are most preferred. The process may be used to make a high performance multifilamentary superconducting article, having a plurality of twisted filaments, wherein the degree of texturing varies substantially in proportion to the radial distance from the center of the article cross-section, and is substantially radially homogeneous at any given cross-section of the article. Round wires and other low aspect ratio multifilamentary articles are preferred forms. The invention is not dependent on the melting characteristics of the desired superconducting oxide. Desired oxide superconductors or precursors with micaceous or semi-micaceous structures are preferred. When used in connection with desired superconducting oxides which melt irreversibly, it provides multifilamentary articles that exhibit high DC performance characteristics and AC performance markedly superior to any currently available for these materials. In a preferred embodiment, the desired superconducting oxide material is BSCCO 2223.