NOVELTY - A fuel cell (10) is formed from electrode/electrolyte structure including array of anode (110) and cathode (112) electrode disposed on opposing sides of a planar electrolyte sheet, where the anodes and cathodes electrodes are electrically connected to one another by electrical conductor. The electrical conductor is made from at least two precious/semiprecious element selected from iridium, rhodium, platinum, ruthenium, palladium or gold. The electrical conductor includes a via fill material and two via pad structures.    USE - As a fuel cell such as solid oxide fuel cell (SOFC) (claimed) useful for generating electricity.    ADVANTAGE - The fuel cell that utilizes electrical conductors which have a specific composition and/or a specific geometry that enhances the durability of the fuel cell. The composition of the electrical conductors has better thermal expansion match to the electrolyte sheet than the traditional electrical conductors made from silver palladium. The composition of the electrical conductor, which is a mixture of low thermal expansion coefficient (CTE) metals (iridium, rhodium, platinum, and ruthenium) and high CTE metals (gold and silver) enables to produce an electrical conductor that has a CTE, which is relatively close to the CTE of an yttrium strontium zirconia (YSZ) electrolyte sheet. The electrical conductor has via pad structures and can be made from a wide variety of materials that have improved properties or economics. The electrical conductor provides a structure that enables the use of a wide variety of materials. For example, the traditional silver alloy electrical conductor can be economically replaced by noble metal alloys which contain platinum by providing a very small amount of the expensive platinum alloy as via fill material and then making the via pad structures out of a less expensive alloy, such as silver-palladium. The electrical conductor minimizes stress in the electrolyte sheet, and decreases the diffusion rate of hydrogen and oxygen through the filled via hole.    DETAILED DESCRIPTION - A fuel cell (10) is formed from electrode/electrolyte structure including array of anode (110) and cathode (112) electrode disposed on opposing sides of a planar electrolyte sheet, where the anodes and cathodes electrodes are electrically connected to one another by at least one electrical conductor traversing at least one via hole (114) in an interconnect separator plate. The electrical conductor is made from at least two precious/semiprecious element selected from iridium, rhodium, platinum, ruthenium, palladium and gold. The electrical conductor includes a via fill material and two via pad structures, at least one of which is made of a different material than the via fill material. The via fill material is located within and around the via hole in the electrolyte sheet, and the two via pad structures are attached to opposing ends of the via fill material that extend from both sides of the via hole. An INDEPENDENT CLAIM is included for an electrode/electrolyte structure comprising the planar electrolyte sheet incorporating anode electrode, cathode electrode, and electric conductor having cermet of precious/semi-precious metal and ceramic; and platinum, rhodium or iridium, and at least one other metal selected from iridium, platinum, palladium, gold, silver and there alloy.    DESCRIPTION OF DRAWING(S) - The figure shows a cross-sectional side view of the fuel cell that has a series of electrochemical cells, which are connected to one another by electrical conductors having enhanced composition.    Fuel cell (100)    Electrochemical cells (102)    Anode electrode (110)    Cathode electrode (112)    Holes. (114)