Cell for electric double layer capacitors and process for manufacturing such a cell
AssigneeCompagnie Europeenne de Composants Electroniques LCC
InventorsGonzal Velasco, Philippe Adet, Philippe Colomban, Thi M. Pham
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Abstract
A method for forming a cell and a cell for an electric double layer capacitor includes a membrane formed from a solid protronic conducting electrolyte separating two electrodes. Each electrode is a composite electrode formed by a mixture of at least one electronic conductor and a solid electrolyte. Preferably, the solid electrolyte of the composite electrodes and the membrane is chosen from a group consisting of uranyl phosphate H.sub.3 O UO.sub.2 PO.sub.4 3H.sub.2), zirconium phosphate Zr(HPO.sub.4).sub.2 nH.sub.2 O, or derivatives of these compounds.
Claims24
A cell for an electric double layer capacitor, comprising:
- a membrane formed of a solid protonic conducting electrolyte separating two electrodes;
- and
- two electrodes each comprising a composite electrode including a mixture of predetermined proportions of at least one electronic conductor and at least one solid electrolyte, said solid electrolyte of said composite electrode comprising a protonic conductor chosen from a group consisting of uranyl phosphate H.sub.3 OUO.sub.2 PO.sub.4.3H.sub.2 O, zirconium phosphate Zr(HOP.sub.4).sub.2 nH.sub.2 O, derivatives of these compounds and protonic conductors with high protonic conductivity having a low electronic conductivity.
A method of manufacturing a cell for an electric double layer capacitor, comprising the following steps:
- forming a composite electrode powder comprising an electronic conductor and a solid electrolyte;
- forming a membrane powder including a solid protonic conducting electrolyte;
- preforming a membrane by pressing said membrane powder;
- simulteanously sintering two electrodes having said composite electrode powder, and said membrane;
- positioning two metal terminators on said electrodes, respectively;
- and
- encapsulating said cell.
A cell for an electric double layer capacitor comprising:
- a membrane formed of a solid protonic conducting electrolyte separating two electrodes, said solid protonic conducting electrolyte of said membrane comprising a protonic conductor chosen from a group consisting of uranyl phosphate H.sub.3 OUO.sub.2 PO.sub.4.3H.sub.2 O, zirconium phosphate Zr(HPO.sub.4).sub.2 nH.sub.2 O, derivatives of these compounds and protonic conductors with high protonic conductivity having a low electronic conductivity;
- and
- two electrodes each comprising a composite electrode including a mixture of predetermined proportions of at least one electronic conductor and at least one solid electrolyte.
Dependencies are inferred from the claim text.