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Abstract

An electrochemical apparatus for power delivery employs an array of electrochemical cells which comprises an end +.sup.ve electrode and an end -.sup.ve electrode separated by one or more bipolar mid-electrodes each with a +.sup.ve side and a -.sup.ve side, the +.sup.ve side of each bipolar electrode comprising an electrically conductive substrate with a porous conductive surface. A bubbly dispersion of air/oxygen in an electrolyte is contacted with the +.sup.ve sides of the bipolar electrodes. The electrochemical apparatus of the invention may be used with an oxygen-sulfur couple with these reagents being provided for example as sodium salts in aqueous solutions, the overall reaction being: 4H.sub.2 O+4S.sup.2- +2O.sub.2 .fwdarw.8OH.sup.- +4S, The process is preferably carried out in an array of cells (20), comprising a plurality of bipolar electrodes 13, each having a +.sup.ve side 12A and a -.sup.ve side 14A spaced from one another by membranes 16 which divide the cell into +.sup.ve and -.sup.ve chambers (22C and 24C) for posilyte and anolyte solutions (22, 24) which are circulated through the chambers.

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First Claim