Experimental investigation of Direct Carbon Fuel Cell fueled by almond shell biochar: Part II. Improvement of cell stability and performance by a three-layer planar configuration

Abstract NiO-Samaria-Doped-Ceria (NiO-SDC) composite powders was synthesized by a traditional mechanical mixing process and tested as anode material for Direct Carbon Fuel Cell (DCFC), which uses almond shell biochar as fuel and molten carbonate-doped ceria composite as electrolyte. A three-layer pellet cell, viz. cathode (Lithiated NiO-SDC), composite electrolyte and anode (NiO-SDC) is fabricated by a die-pressing, screen printing and sintering method. In Part I, a bi-layer DCFC pellet powered by almond shell biochar was tested and demonstrated a good potential. In this paper, we report an improvement in the cell stability and performance by adding the (NiO-SDC) anode layer to the bi-layer pellet containing only cathode and electrolyte. The peak power density of the three-layer pellet cell at 700 °C increases to reach 150 mW cm −2 instead of 127 mW cm −2 while, the stability period is ameliorated to be around 130 min. The results indicated that this porous anode material is promising as anode for DCFCs. The DCFC single cells experiments demonstrated that the anode polarization is dominating the total cell polarization. Therefore, improved power output could be achieved with an improved anode.

[1]  B. Zhu,et al.  Study on nanocomposites based on carbonate@ceria. , 2010, Journal of nanoscience and nanotechnology.

[2]  Direct Conversion of Coal Derived Carbon in Fuel Cells , 2007 .

[3]  Xiang Li,et al.  Surface modification of carbon fuels for direct carbon fuel cells , 2009 .

[4]  Yixiang Shi,et al.  Mechanism for carbon direct electrochemical reactions in a solid oxide electrolyte direct carbon fuel cell , 2011 .

[5]  Yixiang Shi,et al.  Performance improvement of direct carbon fuel cell by introducing catalytic gasification process , 2010 .

[6]  Yongdan Li,et al.  Electrochemical oxidation of graphite in an intermediate temperature direct carbon fuel cell based on two-phases electrolyte , 2013 .

[7]  D. G. Vutetakis,et al.  Electrochemical Oxidation of Molten Carbonate‐Coal Slurries , 1987 .

[8]  M. Cassir,et al.  A Theoretical Study of the Carbon/Carbonate/Hydroxide (Electro-) Chemical System in a Direct Carbon Fuel Cell , 2004 .

[9]  Xiang Li,et al.  Carbon Nanofibers synthesized by catalytic decomposition of methane and their electrochemical performance in a direct carbon fuel cell , 2009 .

[10]  Guiling Wang,et al.  Direct carbon fuel cell: Fundamentals and recent developments , 2007 .

[11]  Bin Zhu,et al.  Innovative low temperature SOFCs and advanced materials , 2003 .

[12]  S. Basu.  Recent trends in fuel cell science and technology , 2007 .

[13]  J. Irvine,et al.  Ni/C Slurries Based on Molten Carbonates as a Fuel for Hybrid Direct Carbon Fuel Cells , 2009 .

[14]  A. Elleuch,et al.  Analytical modeling of electrochemical mechanisms in CO2 and CO/CO2 producing Direct Carbon Fuel Cell , 2012 .

[15]  Qinghua Liu,et al.  Intermediate temperature fuel cell with a doped ceria-carbonate composite electrolyte , 2010 .

[16]  Lei Zhang,et al.  A stable intermediate temperature fuel cell based on doped-ceria-carbonate composite electrolyte and perovskite cathode , 2011 .

[17]  J. Selman,et al.  Analysis of the carbon anode in direct carbon conversion fuel cells , 2012 .

[18]  Choong-Gon Lee,et al.  Gasification of bamboo carbon with molten alkali carbonates , 2011 .

[19]  T. M. Gür,et al.  Experimental and Modeling Study of Biomass Conversion in a Solid Carbon Fuel Cell , 2012 .

[20]  Qinghua Liu,et al.  A high performance composite ionic conducting electrolyte for intermediate temperature fuel cell and evidence for ternary ionic conduction , 2009 .

[21]  Alan F. Jankowski,et al.  Direct Conversion of Carbon Fuels in a Molten Carbonate Fuel Cell , 2004 .

[22]  Qinghua Liu,et al.  Modeling and simulation of a single direct carbon fuel cell , 2008 .

[23]  T. Takagi,et al.  Kinetic studies of the reaction at the nickel pattern electrode on YSZ in H2H2O atmospheres , 1994 .

[24]  K. Cen,et al.  The impact of NiO on microstructure and electrical property of solid oxide fuel cell anode. , 2005, Journal of Zhejiang University. Science. B.

[25]  Qinghua Liu,et al.  A direct carbon fuel cell with (molten carbonate)/(doped ceria) composite electrolyte , 2010 .

[26]  Z. Zhan,et al.  A micro-nano porous oxide hybrid for efficient oxygen reduction in reduced-temperature solid oxide fuel cells , 2012, Scientific Reports.

[27]  B. Zhu,et al.  Enhancement of Conductivity in Ceria-Carbonate Nanocomposites for LTSOFCs , 2009 .

[28]  Yongdan Li,et al.  Electrochemical oxidation of catalytic grown carbon fiber in a direct carbon fuel cell using Ce0.8Sm0.2O1.9-carbonate electrolyte , 2013 .

[29]  J. Irvine,et al.  Electrochemical oxidation of solid carbon in hybrid DCFC with solid oxide and molten carbonate binary electrolyte , 2008 .