Planar co‐laminar flow microbial fuel cell with flow‐through porous electrodes

2021 ◽  
Author(s):  
Taeseong Choi ◽  
Noh Nyun Park ◽  
Yoomin Ahn
Keyword(s):  
Fuel Cell ◽  
Laminar Flow ◽  
Microbial Fuel Cell ◽  
Porous Electrodes ◽  
Flow Through

Numerical Analysis of the Effect of Different Channel Geometries and Electrode Materials on the Performance of Microfluidic Fuel Cells

2010 ◽  
Author(s):  
Ali Ebrahimi Khabbazi ◽  
Andrew Richards ◽  
Mina Hoorfar
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Laminar Flow ◽  
Power Density ◽  
Porous Electrode ◽  
Pem Fuel Cells ◽  
Porous Electrodes ◽  
Electrochemical Reactions ◽  
Flow Through ◽  
Microfluidic Fuel Cell

A typical microfluidic fuel cell is comprised of a Y- or T-shaped microchannel. The fuel and the oxidant streams are introduced from the two different inlets. The anodic and cathodic flows meet each other at the beginning of the main channel and start to travel together along the channel. Due to the fact that the viscous forces dominate the inertia forces in microchannels, the oxidant and the fuel streams establish a side-by-side co-laminar flow which makes the anolyte and catholyte flow together without turbulent mixing. Laminar flow in microfluidic fuel cells plays the role of the membrane in proton exchange membrane (PEM) fuel cells by maintaining the separation of the fuel and oxidant. This eliminates the need for the membrane and overcomes the membrane-related issues such as the ohmic overpotential and water management which are relevant to PEM fuel cells. In addition to the above advantage, the high surface-to-volume ratio of these micron-scale devices contributes to their high power density. This advantage is due to the fact that the electrochemical reactions in fuel cells are surface-based. The electrodes on which the electrochemical reactions are occurring are installed appropriately on the walls of the channel in a way that reacting flows are restricted to the proper electrodes. Since the flow is laminar the performance of the microfluidic fuel cell significantly depends on the device geometry. In this paper, different channel geometries and different electrode configurations are modeled and their performances are compared through the polarization curves. It has been found that the high aspect ratio provides the largest power density. In this work, the performance of the flow-through porous electrode was also modeled and compared against the conventional non-porous electrode microfluidic fuel cells. The flow-through porous electrode design is based on cross-flow of aqueous vanadium redox species through the electrodes into an exit channel, where the waste solutions meet and establish a co-laminar flow. This co-laminar flow of reacted species facilitates ionic charge transfer in a membraneless configuration. It has been found that the flow-through porous architecture provides an increased active surface area which contributes to a higher power density as opposed to the fuel cells with non-porous electrodes.

A Microfluidic Fuel Cell with Flow-Through Porous Electrodes

2008 ◽  
Vol 130 (12) ◽  
pp. 4000-4006 ◽  
Author(s):  
Erik Kjeang ◽  
Raphaelle Michel ◽  
David A. Harrington ◽  
Ned Djilali ◽  
David Sinton
Keyword(s):  
Fuel Cell ◽  
Porous Electrodes ◽  
Flow Through ◽  
Microfluidic Fuel Cell

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

2017 ◽  
Vol 206 ◽  
pp. 413-424 ◽  
Author(s):  
Li Li ◽  
Wenguang Fan ◽  
Jin Xuan ◽  
Michael K.H. Leung ◽  
Keqing Zheng ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Optimal Design ◽  
Porous Electrodes ◽  
Current Collectors ◽  
Flow Through ◽  
Microfluidic Fuel Cell

High-quality effluent and electricity production from non-CEM based flow-through type microbial fuel cell

2013 ◽  
Vol 218 ◽  
pp. 19-23 ◽  
Author(s):  
Kyoung-Yeol Kim ◽  
Kyu-Jung Chae ◽  
Mi-Jin Choi ◽  
Eun-Tae Yang ◽  
Moon Hyun Hwang ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Microbial Fuel Cell ◽  
Electricity Production ◽  
High Quality ◽  
Flow Through

Air-Breathing Membraneless Laminar Flow Fuel Cell With Flow-Through Anode

2011 ◽  
Author(s):  
Seyed Ali Mousavi Shaegh ◽  
Nam-Trung Nguyen ◽  
Siew Hwa Chan
Keyword(s):  
Fuel Cell ◽  
Laminar Flow ◽  
Power Density ◽  
Maximum Power Density ◽  
Reference Case ◽  
Higher Power ◽  
Flow Through ◽  
Fabrication And Characterization ◽  
Porous Anode

This paper reports the fabrication and characterization of a new concept of flow-through anode for membraneless laminar flow fuel cell (LFFC). To establish a reference case, a fuel cell with flow over and planar anode was fabricated as well. Experimental results indicated that maximum power density was improved from 17 mW/cm2 in planar design to 23 mW/cm2 using the flow-through design. The higher power density of flow-through design is an indicative of higher fuel utilization in the porous anode. Images of the flow obtained experimentally showed that mixing was reduced at the liquid-liquid interface in the channel with flow-through anode leading to increased fuel concentration over anode.

scholarly journals Electricity generation of a laminar-flow microbial fuel cell without any additional power supply

RSC Advances ◽  
2018 ◽  
Vol 8 (59) ◽  
pp. 33637-33641
Author(s):  
Dingding Ye ◽  
Pengqing Zhang ◽  
Xun Zhu ◽  
Yang Yang ◽  
Jun Li ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Laminar Flow ◽  
Microbial Fuel Cell ◽  
Power Supply ◽  
Electricity Generation

A novel laminar-flow microbial fuel cell without any additional power supply is proposed.

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