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    • 1. 发明申请
    • A METHOD FOR PRODUCING AN ELECTRODE OF A CAPACITOR, IN PARTICULAR A SUPER-CAPACITOR
    • 用于生产电容器的电极的方法,特别是超级电容器
    • WO2012062540A1
    • 2012-05-18
    • PCT/EP2011/068175
    • 2011-10-18
    • PAUL SCHERRER INSTITUTETH ZURICHHANTEL, Moritz, MaximilianKASPAR, TommyKÖTZ, RüdigerNESPER, Reinhard
    • HANTEL, Moritz, MaximilianKASPAR, TommyKÖTZ, RüdigerNESPER, Reinhard
    • H01G9/058
    • H01G11/32H01G11/34H01G11/86Y02E60/13
    • Partially reduced graphite oxide (GOpr) prepared from natural as well as synthetic graphite was used as electrode material for supercapacitors in e.g. 1 M Et 4 NBF 4 in acetonitrile electrolyte. As a function of the degree of reduction of graphite oxide (GO) the graphite layer distance was varied between 0.46 and 0.33 nm. The initial specific capacitance of all samples was negligibly small around the open circuit potential, which was in agreement with the small BET surface area of the reduced GO powder of around 15 m2/g. During the first potential cycle, however, electrochemical activation resulted in a specific capacitance of up to 220 F/g for samples with a graphene layer distance of 0.44 nm using 1 M Et 4 NBF 4 in acetonitrile. For lithium containing electrolytes, e.g. 1M LiPF 6 in EC/DMC, the measured specific capacitance after activation was found to be approximately 600 F/g. The potential for anodic and cathodic electrochemical activation was found to be a function of the GO layer distance. Dilatometrie investigations showed a significant swelling and shrinking of the samples.
    • 将由天然和合成石墨制备的部分还原的氧化石墨(GOpr)用作例如超级电容器的电极材料。 1 M Et4NBF4在乙腈电解质中。 作为石墨氧化物(GO)的还原程度的函数,石墨层的距离在0.46和0.33nm之间变化。 所有样品的初始比电容在开路电位周围可以忽略不计,这与约15m 2 / g的还原GO粉末的小BET表面积一致。 然而,在第一个潜在循环期间,使用1M乙腈中的1M Et4NBF4,石墨烯层距离为0.44nm的样品,电化学活化导致高达220 F / g的比电容。 对于含锂电解质,例如 在EC / DMC中的1M LiPF 6,测得的活化后的比电容约为600F / g。 发现阳极和阴极电化学活化的潜力是GO层距离的函数。 百日咳调查显示样品显着膨胀和收缩。