Scherrer, BarbaraEvans, AnnaSantis-Alvarez, AlejandroJiang, BoMartynczuk, JuliaNabavi, MajidGalinski, HenningPrestat, MichelTölke, RenéBieberle-Hutter, AnjaPoulikakos, DimosMuralt, PaulNiedermann, PhilippeDommann, AlexMaeder, ThomasHeeb, PeterStraessle, ValentinMuller, ClaudeGauckler, Ludwig2013-09-272013-09-272013-09-27201410.1016/j.jpowsour.2014.02.039https://infoscience.epfl.ch/handle/20.500.14299/94985WOS:000334899300052Low temperature micro-solid oxide fuel cell (micro-SOFC) systems are an attractive alternative power source for small-size portable electronic devices due to their high energy efficiency and density. Here, we report a thermally self-sustainable reformer – micro-SOFC assembly. The device consists of a micro-reformer bonded to a silicon chip containing 30 micro-SOFC membranes and a functional glass carrier with gas channels and screen-printed heaters for start-up. Thermal independence of the device from the externally powered heater is achieved by this exothermic reforming reaction above 470 °C. The reforming reaction and the fuel gas flow rate of the n-butane/air gas mixture controls the operation temperature and gas composition on the micro-SOFC membrane. In the temperature range between 505 °C and 570 °C, the gas composition after the micro-reformer consists of 12 vol% to 28 vol% H2. An open-circuit voltage of 1.0 V and maximum power density of 47 mW/cm2 at 565 °C is achieved with the on-chip produced hydrogen at the micro-SOFC membranes.couches épaissesthick-film technologyLTCCmicrosystèmesmicrosystemsMEMSpiles à combustible à oxyde solidesolid-oxide fuel cellsSOFCµ-SOFCfluidiquefluidicsmicrofluidiquemicrofluidicspackagingmicroréacteurs chimiqueschemical microreactorsthermiquethermal managementcouches mincesthin filmsreformage butanebutane reformingoxydation partielle catalytiquecatalytic partial oxidationdémonstrateurdemonstratorONEBATtext::journal::journal article::research article