Ultracapacitor with a Low Leakage Current
    31.
    发明申请

    公开(公告)号:US20190088421A1

    公开(公告)日:2019-03-21

    申请号:US16132849

    申请日:2018-09-17

    申请人: AVX Corporation

    IPC分类号: H01G11/42 H01G11/68 H01G11/58

    摘要: An ultracapacitor that contains at least one electrochemical cell is provided. The cell includes a first electrode that contains a first carbonaceous coating (e.g., activated carbon particles) electrically coupled to a first current collector, a second electrode that contains a second carbonaceous coating (e.g., activated carbon particles) electrically coupled to a second current collector, an aqueous electrolyte in ionic contact with the first electrode and the second electrode and that contains a polyprotic acid (e.g., sulfuric acid), and a separator that is positioned between the first and second electrodes. Through selective control over the particular nature of the materials used to form the ultracapacitor, as well as the manner in which they are formed, a variety of beneficial properties may be achieved.

    Graphene oxide-bonded metal foil thin film current collector and battery and supercapacitor containing same

    公开(公告)号:US10158122B2

    公开(公告)日:2018-12-18

    申请号:US15231498

    申请日:2016-08-08

    摘要: A graphene oxide-bonded metal foil current collector in a battery or supercapacitor, comprising: (a) a free-standing, non-supported thin metal foil having a thickness from 1 μm to 30 μm and two primary surfaces; and (b) a thin film of graphene oxide chemically bonded to at least one of the two primary surfaces without using a binder or adhesive wherein the primary surface does not contain a metal oxide layer and the thin film of graphene oxide has a thickness from 10 nm to 10 μm, an oxygen content from 0.1% to 10% by weight, an inter-graphene plane spacing of 0.335 to 0.50 nm, a physical density from 1.3 to 2.2 g/cm3, all graphene oxide sheets being oriented substantially parallel to each other and parallel to the primary surfaces, exhibiting a thermal conductivity greater than 500 W/mK, and/or electrical conductivity greater than 1,500 S/cm when measured alone without the thin metal foil.