Stabilized electrodes for electrochemical cells. An electrochemical cell based on an environmentally benign zirconia stabilized Fe.sup.6+/B.sup.2- chemistry is disclosed. An electrochemical potential is sustained compatible to the pervasive, conventional alkaline (MnO.sub.2--Zn battery), and with a much higher electrical storage capacity. Either or both the anode and cathode may be stabilized. For example, a zirconia overlayer on either TiB.sub.2 or VB.sub.2 boride anodes, and/or super-iron, K.sub.2FeO.sub.4, cathodes stabilizes the electrodes, while sustaining facile charge transfer. The energetic Fe.sup.6+ cathode elevates, and fully compensates for, the boride/zinc anode potential differential.
FEDERALLY SPONSORED RESEARCH
 This invention was made with Government support under Grant No. DE-FG02-04ER15585 awarded by the U.S. Department of the Energy. The Government of the United States may have certain rights in and to the invention claimed herein.