Characterization of symmetrical SrFe0.75Mo0.25O3−δ electrodes in direct carbon solid oxide fuel cells

Abstract

Symmetrical solid oxide fuel cells (SOFCs) that feature nanostructured SrFe 0.75 Mo 0.25 O 3-δ (SFMO) electrodes which are impregnated into porous La 0.9 Sr 0.1 Ga 0.8 Mg 0.2 O 3-δ (LSGM) skeletons by solution infiltration technique are prepared. The symmetrical SOFCs are investigated in detail by operating with 5 wt.% * Corresponding author. Tel. /fax: +86 20 22236168. © 2016. This manuscript version is made available under the Elsevier user license http://www.elsevier.com/open-access/userlicense/1.0/ 2 Fe-loaded activated carbon as fuel and ambient air as oxidant. A typical single cell can give a maximum power density of 405 mW cm -2 at 850 o C, which is comparable to the results with Ni-based anode-supported SOFCs. Also, the direct carbon SOFC (DC-SOFC) with reloaded fuel can recover its initial performance. The microstructures and XRD of the electrodes after test are also examined and analysed.The results show that the SFMO-LSGM composite anode remains porous and maintains its structure stability, implying that the symmetrical SFMO electrodes can be applied into DC-SOFCs.

Enhancing the Power Output of Direct Carbon Solid Oxide Fuel Cell Using Ba‐Loaded Activated Carbon Fuel

“…Generally, Fe‐based materials are regarded as the high‐efficiency and stable catalysts for catalyzing the Boudouard reaction, and the Fe‐loaded activated carbon has been proven to be one of the best carbon fuels for DC‐SOFCs . To develop higher activity catalysts for Boudouard reaction and thus improve the cell performance, carbon fuels containing 3, 5, 7, and 10 wt% Ba and pure activated carbon were prepared and evaluated in DC‐SOFCs at 850 °C with 5 wt% Fe‐loaded activated carbon as a benchmark.…”

“…As a result, the solid‐state electrolyte is more suitable for practical application in comparison with the liquid electrolyte in a DCFC due to safety issues. For these reasons, the direct carbon solid oxide fuel cell (DC‐SOFC) with a ceramic oxygen ion conductor as the electrolyte has attracted a particular interest because it is an all‐solid‐state fuel cell directly operating with solid carbon as fuel without any liquid medium or purging gas . In fact, it also can be regarded as a SOFC operated with carbon fuel.…”

Synthesis and Electrochemical Performance of Layered Double Perovskite Anode for Direct Carbon Solid Oxide Fuel Cell

“…VIII metals greatly acceleratev the reaction rate of reverse Boudouard reaction [4,5] . Perovskite is an extensively studied material in DC-SOFC anode, which is mixed ionic and electronic conduction(MIEC) [6][7][8][9] . Rencently, A-site ordered layered double perovskite materials have received more and more attention in the field of fuel cells, such as PrBa 0.5 Sr 0.5 Co 2-…”

Numerical Simulation of Fluidized Bed Gasifier Coupled with Solid Oxide Fuel Cell Fed with Solid Carbon

“…Based on this mechanism, the performance of DC-SOFC will be affected by the electrochemical oxidation of CO at TPBs in anodes, the Boudouard gasification and mass transport between anode and solid carbon fuel [25][26][27]. Besides development of new anode material and microstructure [19,[28][29][30], which can improve catalytical activity, mass transport, ionic or electronic conductivities of anode, plenty of experimental evidence demonstrates that carbon activity and transport properties in the anode can significantly influence the DC-SOFC performance [3,13,17,21,25,[31][32][33][34]. Liu et al [31] operated a tubular SOFC fed with the activated carbon and the results indicated that the fuel gas in the anode was insufficient and the mass transport in the anode was poor.…”