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    • 81. 发明授权
    • High capacity/high discharge rate rechargeable positive electrode
    • 高容量/高放电倍率的可充电正极
    • US06200704B1
    • 2001-03-13
    • US09145484
    • 1998-09-01
    • Bruce D. KatzLutgard C. De JongheMay-Ying ChuSteven J. Visco
    • Bruce D. KatzLutgard C. De JongheMay-Ying ChuSteven J. Visco
    • H01M458
    • H01M4/02H01M4/362H01M4/581H01M4/5815H01M4/625H01M10/0436H01M10/052H01M2004/028
    • Disclosed is a positive electrode that has a low equivalent weight and high cell voltage and consequently a high specific energy, and a high discharge rate pulse capability. Also disclosed are methods for fabricating active-sulfur-based composite electrodes, and battery cells incorporating such electrodes. The batteries of this invention are preferably rechargeable and operate at high sulfur utilization over many cycles. Positive electrodes according to the present invention are composed of at least two electrochemically active materials: an “active-sulfur” material, and a second electrochemically active material having a higher discharge rate than the active-sulfur component. The active-sulfur component is also oxidizing with respect to the higher discharge rate material. In operation, the active-sulfur component of the positive electrode discharges to satisfy power demands below its maximum discharge rate. The high discharge rate (but relatively low capacity) material is discharged to satisfy power demands that exceed the active-sulfur's discharge rate. The high discharge rate material in the positive electrode may be effectively recharged (or “regenerated”) chemically by oxidation by the active-sulfur material during a “resting” phase, that is, when the power demands on a battery cell in which the cathode is incorporated are low enough that they may be met without exceeding the maximum discharge rate of the active-sulfur component of the positive electrode.
    • 公开了具有低当量和高电池电压并因此具有高比能量和高放电率脉冲能力的正电极。 还公开了制造活性硫基复合电极的方法以及包含这种电极的电池单体。本发明的电池优选是可充电的并且在多个循环中以高硫利用运行。 根据本发明的正电极由至少两种电化学活性材料:“活性硫”材料和具有比活性硫组分更高的放电率的第二电化学活性材料组成。 相对于较高的排出速率的材料,活性硫成分也是氧化的。 在操作中,正极的活性硫成分排出以满足低于其最大放电率的功率需求。 高放电率(但容量相对较小)的材料排放满足超过活性硫排放速率的电力需求。 正极中的高放电率材料可以通过在“静止”阶段期间被活性硫材料氧化而化学地再充电(或“再生”),即当电力需要电池单元时,其中阴极 并不足够超过正极的活性硫成分的最大排出速度,所以能够满足这些要求。
    • 89. 发明授权
    • Thermally protective salt material for thermal spraying of electrode materials
    • 用于热喷涂电极材料的耐热盐材料
    • US06794086B2
    • 2004-09-21
    • US09795696
    • 2001-02-28
    • Jinxiang DaiRonald A. GuidottiTongsan D. XiaoDavid E. Reisner
    • Jinxiang DaiRonald A. GuidottiTongsan D. XiaoDavid E. Reisner
    • H01M458
    • H01M6/36C23C4/04C23C4/11H01M4/08
    • A method for the manufacture of an electrode for an energy storage or conversion device comprises thermally spraying a feedstock mixture comprising an effective quantity of a source of a thermally protective salt and an active material or active material precursor onto a substrate to produce a film of the active material and salt. The film can have a thickness of about 1 to about 1000 microns. In a particularly advantageous feature, the active materials which ordinarily decompose or are unavailable at the high temperatures used during thermal spray processes, such as metal chalcogenides such as pyrite, CoS2, WS2, Ni(OH)2, MnO2, and the like may be thermally sprayed to form an electrode when the feedstock mixture employs an effective amount of a source of the thermally protective salt coating. The active material feedstock may comprise microstructured or nanostructured materials, which after thermal spray results in electrodes having microstructured or nanostructured active materials, respectively.
    • 一种用于制造用于能量储存或转化装置的电极的方法包括将包含有效量的热保护盐源和活性材料或活性材料前体的原料混合物热喷涂到基底上以产生 活性物质和盐。 该膜可以具有约1至约1000微米的厚度。在特别有利的特征中,通常在热喷涂过程中使用的高温下分解或不可用的活性材料,例如金属硫族化物如黄铁矿,CoS 2,WS 2 ,当原料混合物使用有效量的耐热盐涂层源时,Ni(OH)2,MnO 2等可以被热喷涂以形成电极。 活性材料原料可以包含微结构或纳米结构材料,其在热喷涂后分别导致具有微结构或纳米结构的活性材料的电极。
    • 90. 发明授权
    • Carbon electrode coated with porous metal film, its fabrication method and lithium secondary battery using the same
    • 涂有多孔金属膜的碳电极,其制造方法和使用其的锂二次电池
    • US06780541B2
    • 2004-08-24
    • US09932940
    • 2001-08-21
    • Kyung-Suk YunByung-Won ChoWon-Il ChoHyung-Sun KimUn-Seok KimSang-Cheol NamYoung-Soo Yoon
    • Kyung-Suk YunByung-Won ChoWon-Il ChoHyung-Sun KimUn-Seok KimSang-Cheol NamYoung-Soo Yoon
    • H01M458
    • H01M4/04H01M4/0402H01M4/0421H01M4/0426H01M4/485H01M4/505H01M4/525H01M4/587Y10T428/31678
    • A method for fabricating carbon electrode coated with a porous metal film includes the steps of: positioning a roll of carbon material within a vacuum chamber; winding the carbon material off the roll at a certain speed, winding the carbon material on a different roll while coating a porous metal to a thickness of a few Řa few &mgr;m on the carbon material between the two rolls from a metal evaporation source; and stabilizing the thusly coated carbon material under a vacuum. The coated porous metal film is of Li, Al, Sn, Bi, Si, Sb, Ni, Cu, Ti, V, Cr, Mn, Fe, Co, Zn, Mo, W, Ag, Au, Pt, Ru, Ir, In or their alloys. Since the stable film is formed on the surface of the carbon material, when the thusly coated carbon material is use for forming a cathode electrode of a secondary battery, the reversibility and high rate charging and discharging characteristics of the carbon electrode can be improved. In addition, when a lithium-ion secondary battery is fabricated using the carbon electrode coated with lithium or a lithium alloy, the capacity degradation due to the irreversible capacity of the conventional carbon electrode appearing at the initial state of charging can be prevented, so that the capacity can be increased.
    • 涂覆有多孔金属膜的碳电极的制造方法包括以下步骤:将碳材料卷定位在真空室内; 以一定的速度将碳材料从轧辊上卷绕,将碳材料卷绕在不同的辊上,同时在来自金属蒸发源的两个辊之间的碳材料上涂覆几微米厚度的多孔金属; 并在真空下稳定如此涂覆的碳材料。 涂层多孔金属膜为Li,Al,Sn,Bi,Si,Sb,Ni,Cu,Ti,V,Cr,Mn,Fe,Co,Zn,Mo,W,Ag,Au,Pt,Ru,Ir ,In或它们的合金。 由于在碳材料的表面上形成稳定的膜,所以当这样涂覆的碳材料用于形成二次电池的阴极时,可以提高碳电极的可逆性和高速充放电特性。 此外,当使用涂覆有锂或锂合金的碳电极制造锂离子二次电池时,可以防止由于在初始充电状态下出现的常规碳电极的不可逆容量导致的容量降低,使得 可以增加容量。