Optimal design of current collectors for microfluidic fuel cell with flow-through porous electrodes: Model and experiment

Design optimization of current collectors has been performed to reduce the significant ohmic resistance observed in microfluidic fuel cell (MFC) with flow-through porous electrodes. A three-dimensional computational model is developed to investigate the electron transport characteristics in the porous electrodes, where lateral electron transport is found to encounter high resistance. Influences of different current collector design parameters on the transport resistances are examined and analyzed. The modeling results indicate that current collector position is the most influential factor due to the non-uniform flow rate distribution. Optimal current collector position is located at the high flow rate region instead of the conventional exposed end of the porous electrode. Experimental studies are performed to support the modeling analysis. The experimental results demonstrate that the optimized current collector position can boost the maximum power density by 61%. This study highlights the significance of the current collector design in achieving high performance MFC with flow-through porous electrodes. Based on the results, some general rules have been set for the current collector designs in this energy system, which can provide useful guidance for the future development of MFC.

[1]  Tomoo Yamamura,et al.  Electron-Transfer Kinetics of Np3 + ∕ Np4 + , NpO2 + ∕ NpO2 2 + , V2 + ∕ V3 + , and VO2 + ∕ VO2 + at Carbon Electrodes , 2005 .

[2]  Faizur Rahman,et al.  Vanadium redox battery: Positive half-cell electrolyte studies , 2009 .

[3]  Dennis Y.C. Leung,et al.  A vapor feed methanol microfluidic fuel cell with high fuel and energy efficiency , 2015 .

[4]  Jun Ki Hong,et al.  Electrochemical characteristics of vanadium redox reactions on porous carbon electrodes for microfluidic fuel cell applications , 2012 .

[5]  S. Basu,et al.  Application of electrospun CNx nanofibers as cathode in microfluidic fuel cell , 2017 .

[6]  Hong Xu,et al.  Counter-flow formic acid microfluidic fuel cell with high fuel utilization exceeding 90%☆ , 2015 .

[7]  Yang Yang,et al.  Biofilm distribution and performance of microfluidic microbial fuel cells with different microchannel geometries , 2015 .

[8]  Erik Kjeang,et al.  In-situ characterization of symmetric dual-pass architecture of microfluidic co-laminar flow cells , 2016 .

[9]  David Sinton,et al.  A microfluidic fuel cell with flow-through porous electrodes. , 2008, Journal of the American Chemical Society.

[10]  P. Ivanov,et al.  Influence of current collectors design on the performance of a silicon-based passive micro direct methanol fuel cell , 2009 .

[11]  H. Ju,et al.  Numerical analysis of vanadium crossover effects in all-vanadium redox flow batteries , 2015 .

[12]  Luis Gerardo Arriaga,et al.  Perspective use of direct human blood as an energy source in air-breathing hybrid microfluidic fuel cells , 2015 .

[13]  Shashikant B. Thombre,et al.  A critical review of the current collector for passive direct methanol fuel cells , 2015 .

[14]  Albert J. Shih,et al.  A micro-scale model for predicting contact resistance between bipolar plate and gas diffusion layer in PEM fuel cells , 2007 .

[15]  Li Li,et al.  Partial modification of flow-through porous electrodes in microfluidic fuel cell , 2015 .

[16]  H. Nirschl,et al.  Model of a vanadium redox flow battery with an anion exchange membrane and a Larminie-correction , 2014 .

[17]  F. Marone,et al.  Determination of Material Properties of Gas Diffusion Layers: Experiments and Simulations Using Phase Contrast Tomographic Microscopy , 2009 .

[18]  Jin Wook Lee,et al.  Chip-embedded thin film current collector for microfluidic fuel cells , 2012 .

[19]  Martin Z Bazant,et al.  Membrane-less hydrogen bromine flow battery , 2013, Nature Communications.

[20]  D. Ingham,et al.  The contact resistance between gas diffusion layers and bipolar plates as they are assembled in proton exchange membrane fuel cells , 2013 .

[21]  Yair Ein-Eli,et al.  Reduced contact resistance of PEM fuel cell's bipolar plates via surface texturing , 2007 .

[22]  Maria Skyllas-Kazacos,et al.  A study of the V(II)/V(III) redox couple for redox flow cell applications , 1985 .

[23]  N. Arjona,et al.  Hybrid microfluidic fuel cell based on Laccase/C and AuAg/C electrodes. , 2014, Biosensors & bioelectronics.

[24]  Y. H. Kwok,et al.  Ultra-fine Pt nanoparticles on graphene aerogel as a porous electrode with high stability for microfluidic methanol fuel cell , 2017 .

[25]  Li Li,et al.  Vanadium microfluidic fuel cell with novel multi-layer flow-through porous electrodes: Model, simulations and experiments , 2016 .

[26]  Liang Hao,et al.  Lattice Boltzmann simulations of anisotropic permeabilities in carbon paper gas diffusion layers , 2009 .

[27]  D. Ingham,et al.  Effect of polytetrafluoroethylene-treatment and microporous layer-coating on the electrical conductivity of gas diffusion layers used in proton exchange membrane fuel cells , 2010 .

[28]  Yasushi Katayama,et al.  Investigations on V(IV)/V(V) and V(II)/V(III) redox reactions by various electrochemical methods , 2005 .

[29]  E. Kjeang,et al.  Reactant recirculation in electrochemical co-laminar flow cells , 2014 .

[30]  J. Garcia-Cordero,et al.  Waste-to-energy conversion from a microfluidic device , 2017 .

[31]  S. Thombre,et al.  Performance of passive DMFC with expanded metal mesh current collectors , 2017 .

[32]  S. M. Durón-Torres,et al.  Glucose microfluidic fuel cell using air as oxidant , 2016 .

[33]  Hao Zhang,et al.  Numerical and experimental comparative study of microfluidic fuel cells with different flow configurations: Co-flow vs. counter-flow cell , 2017 .

[34]  Tero Hottinen,et al.  Inhomogeneous compression of PEMFC gas diffusion layer: Part I. Experimental , 2007 .

[35]  Aimy Bazylak,et al.  Up-Scaled Microfluidic Fuel Cells With Porous Flow-Through Electrodes , 2013 .

[36]  Janet Ledesma-García,et al.  An improved ethanol microfluidic fuel cell based on a PdAg/MWCNT catalyst synthesized by the reverse micelles method , 2016 .

[37]  Soheila Yaghmaei,et al.  Characterization of a microfluidic microbial fuel cell as a power generator based on a nickel electrode. , 2016, Biosensors & bioelectronics.

[38]  Chengwei Wu,et al.  Contact resistance prediction and structure optimization of bipolar plates , 2006 .

[39]  Erik Kjeang,et al.  Computational modeling of microfluidic fuel cells with flow-through porous electrodes , 2011 .

[40]  H. Pramanik,et al.  Electrooxidation study of NaBH4 in a membraneless microfluidic fuel cell with air breathing cathode for portable power application , 2017 .

[41]  Mark W. Verbrugge,et al.  Ion and Solvent Transport in Ion‐Exchange Membranes II . A Radiotracer Study of the Sulfuric‐Acid, Nation‐117 System , 1990 .

[42]  Kwang‐Yong Kim,et al.  Effects of geometric configuration of the channel and electrodes on the performance of a membraneless micro-fuel cell , 2017 .

[43]  Xianguo Li,et al.  Numerical estimation of the effective electrical conductivity in carbon paper diffusion media , 2012 .

[44]  T. Zhao,et al.  A micro-porous current collector enabling passive direct methanol fuel cells to operate with highly concentrated fuel , 2014 .

[45]  D. Erickson,et al.  A plate-frame flow-through microfluidic fuel cell stack , 2011 .

[46]  Xianguo Li,et al.  Effective transport properties for polymer electrolyte membrane fuel cells – With a focus on the gas diffusion layer , 2013 .

[47]  Yasushi Katayama,et al.  Investigation on V(IV)/V(V) species in a vanadium redox flow battery , 2004 .

[48]  R. Pitchumani,et al.  MEASUREMENT AND PREDICTION OF ELECTRICAL CONTACT RESISTANCE BETWEEN GAS DIFFUSION LAYERS AND BIPOLAR PLATE FOR APPLICATIONS TO PEM FUEL CELLS , 2004 .