We report the designing and evaluation of a cathode-honeycomb-supported solid oxide fuel cell (SOFC), capable of generating high volumetric power density. The numerical analyses showed that the cathode-honeycomb-supported SOFC can be the most efficient form with the lowest current collection loss, as compared with the electrode- or anode-honeycomb-supported ones. The cathode-honeycomb-supported SOFC, which was fabricated via the extrusion of a LaSrMnO3 honeycomb monolith and the channel surface coating by our developed wet process using electrolyte/anode bilayers, exhibited the high volumetric power density above 1 and 2 W/cm(3) at 600 and 650 degrees C, respectively, under a wet H-2 fuel flow. (C) 2008 The Electrochemical Society.