초록

An inexpensive porous metal oxide material having high surface area, good conductivity and high specific capacitance is advantageously used in an electrochemical capacitor. The materials are formed in a sol-gel process which affords control over the properties of the resultant metal oxide materials.

대표청구항 ▼

[ We claim:] [1.] An electrochemical capacitor comprising an anode and a cathode, the anode and the cathode comprising:an electrode substrate;a porous coating on the substrate, the coating comprising a metal oxide and having a surface area of greater than 30 m.sup.2 /g, a porosity in the range of 10

[ We claim:] [1.] An electrochemical capacitor comprising an anode and a cathode, the anode and the cathode comprising:an electrode substrate;a porous coating on the substrate, the coating comprising a metal oxide and having a surface area of greater than 30 m.sup.2 /g, a porosity in the range of 10 to 80%, a mean grain size between 2 and 100 nm, and a mean pore size of between 0.5 and 20 nm; andan electrolyte in contact with the coating,wherein the metal oxide comprises an anion and a cation in a non-stoichiometric ratio.