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The Journal of Engineering

Numerical simulation of the performance of air-breathing direct formic acid microfluidic fuel cells

Content Provider	IET Digital Library
Author	Herlambang, Yusuf Dewantoro Shyu, Jin Cherng Lee, Shun Ching
Abstract	This work numerically investigated the effects of various factors on the performance of air-breathing direct formic acid microfluidic fuel cells. An MFC with a microchannel width of 1.5 mm, depth of 0.05 mm, and electrode spacing of 0.3 mm was used in the simulation. An MFC which was a 1.5-mm-wide, 0.05-mm-deep microchannel installed with two 0.3-mm-apart electrodes was used in the simulation. The mixture of formic acid at concentrations of 0.3, 0.5, and 1.0 M and 0.5-M sulphuric acid served as fuel, while a 0.5-M sulphuric acid stream served as the electrolyte introduced at inlet flow rates of 0.05, 0.1, and 0.5 mL/min. First, a three-dimensional MFC model was built using COMSOL Multiphysics 5.1 to simulate the fuel cell performance. Subsequently, I–V curves obtained from simulations and from published experimental data under similar operating conditions were compared to ensure the validity of the simulation. Transport phenomena were formulated with a continuity equation, momentum equation, species transport equation, and charge equation. Additionally, the flow through porous media in the gas diffusion layer was described using the Brinkman equation, whereas the Butler–Volmer equation was applied to obtain I–V and P–I curves. The current density distribution resulting from internal current loss and reactant concentration on both electrodes was also determined in this work.
Starting Page	860
Ending Page	865
Page Count	6
Volume Number	12
e-ISSN	17500443
Issue Number	Issue 11, Nov (2017)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/mnl/12/11
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/mnl.2017.0322
Journal	Micro & Nano Letters
Publisher Date	2017-11-01
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Air-breathing Direct Formic Acid Microfluidic Fuel Cell Applied Fluid Mechanics Aqueous Solution Brinkman Equation Butler–Volmer Equation Charge Equation Computational Method COMSOL Multiphysics 5.1 Continuity Equation Current Density Current Density Distribution Electrochemical Electrodes Electrochemistry And Electrophoresis Electrode Spacing Electrolyte Flow Simulation Flow Through Porous Media Flows in Ducts, Channel, And Conduits Fuel Cell Gas Diffusion Layer General Fluid Dynamics Theory Inlet Flow Rates Internal Current Loss I–V Curves Microchannel Flow Microchannel Width Momentum Equation Numerical Analysis Numerical Simulation Organic Compound P–I Curves Reactant Concentration Simulation Species Transport Equation Sulphuric Acid Stream Three-dimensional MFC Model
Content Type	Text
Resource Type	Article

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