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    • 4. 发明授权
    • Electric double-layer capacitor and method of making a separator therefor
    • 电双层电容器及其制造方法
    • US06190501B1
    • 2001-02-20
    • US09324658
    • 1999-06-03
    • Yuichiro TanakaNoriko IshiiJiro OkumaRitsuo Hara
    • Yuichiro TanakaNoriko IshiiJiro OkumaRitsuo Hara
    • D21F1100
    • H01G9/02Y02E60/13
    • An electric double-layer capacitor includes a casing, a pair of porous electrodes disposed within the casing, a permeable separator sandwiched between both the porous electrodes, and an electrolytic liquid formed of an organic solvent, injected into the casing and permeating the porous electrodes and the separator. The separator is formed from an aggregate of cellulose fiber having a surface modified by an organic solvent thereby. A method of making a separator for an electric double-layer capacitor includes producing a cellulose fiber aggregate, forming a sheet of the cellulose fiber aggregate, modifying a surface of the cellulose fiber aggregate sheet by immersing the sheet in an organic solvent for a predetermined time period, drying the modified sheet, and cutting the dried sheets to form the separator of a desired size and shape. The cellulose fiber aggregate sheet may also be pretreated by immersing the sheet in an amphipathic solvent. Since the wettability of the cellulose fiber to the electrolytic liquid is improved, the permeation of the electrolytic liquid into the separator is improved, whereby a reduction in internal resistance of the electric double-layer capacitor is achieved.
    • 电双层电容器包括壳体,设置在壳体内的一对多孔电极,夹在两个多孔电极之间的可渗透分离器和由有机溶剂形成的电解液,注入壳体并渗透多孔电极, 分隔符。 隔板由具有由有机溶剂改性的表面的纤维素纤维的聚集体形成。 制造双电层电容器用隔膜的方法包括:制造纤维素纤维聚集体,形成纤维素纤维聚集体片材,通过将片材浸渍在有机溶剂中预定时间来改性纤维素纤维聚集体片材的表面 期间,干燥改性片材,切割干燥的片材以形成所需尺寸和形状的分离器。 纤维素纤维聚集体片材也可以通过将片材浸入两性溶剂中进行预处理。 由于纤维素纤维对电解液的润湿性提高,电解液向隔膜的渗透性提高,可以实现双电层电容器的内阻降低。