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Polyoxometalate-modified carbon electrodes and uses therefor in capacitors

  • US 4,633,372 A
  • Filed: 08/26/1985
  • Issued: 12/30/1986
  • Est. Priority Date: 08/26/1985
  • Status: Expired due to Fees
First Claim
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1. An improved carbon-based electrode comprising an activated carbon electrode having absorbed throughout the electrode structure a polyoxometalate compound represented by the formula


  • space="preserve" listing-type="equation">A.sub.a [L.sub.l M.sub.m J.sub.z O.sub.y ]
whereinA is at least one ion selected from the group consisting of hydrogen, the Group I-A to VIII-A or I-B to VII-B elements, the rare earths or actinides, ammonium, alkyl ammonium, alkyl phosphonium and alkyl arsonium;

L is at least one element selected from the group consisting of hydrogen and Group III-B to VII-B elements;

M is at least one metal selected from the group consisting of Group I-A to IV-A metals, Group VII-A to II-B metals, the rare earths and actinides; and

J is at least one metal selected from the group consisting of Group V-A and Group VI-A metals; and

whereina is a number which when multiplied by the valence of A will balance the charge on the polyoxometalate complex within the brackets;

l is a number ranging from zero to about 20;

m is a number ranging from zero to about 20;

z is a number ranging from about 1 to about 50; and

y is a number ranging from about 7 to about 150.

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