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An air-breathing microfluidic formic acid fuel cell with a porous planar anode : experimental and numerical investigations

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : An air-breathing microfluidic formic acid fuel cell with a porous planar anode : experimental and numerical investigations
นักวิจัย : Shaegh, Seyed Ali Mousavi , Nguyen, Nam-Trung , Chan, Siew Hwa
คำค้น : DRNTU::Engineering::Mechanical engineering
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2553
อ้างอิง : Shaegh, S. A. M., Nguyen, N. T., & Chan, S. H. (2010). An air-breathing microfluidic formic acid fuel cell with a porous planar anode: experimental and numerical investigations. Journal of Micromechanics and Microengineering, 20(10). , http://hdl.handle.net/10220/7932 , http://dx.doi.org.ezlibproxy1.ntu.edu.sg/10.1088/0960-1317/20/10/105008 , 159363
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : Journal of micromechanics and microengineering
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

This paper reports the fabrication, characterization and numerical simulation of an air-breathing membraneless laminar flow-based fuel cell with carbon-fiber-based paper as an anode. The fuel cell uses 1 M formic acid as the fuel. Parameters from experimental results were used to establish a three-dimensional numerical model with COMSOL Multiphysics. The simulation predicts the mass transport and electrochemical reactions of the tested fuel cell using the same geometry and operating conditions. Simulation results predict that the oxygen concentration over an air-breathing cathode is almost constant for different flow rates of the fuel and electrolyte. In contrast, the growth of a depletion boundary layer of the fuel over the anode can be the major reason for low current density and low fuel utilization. At a low flow rate of 10 µl min−1, simulation results show a severe fuel diffusion to the cathode side, which is the main reason for the degradation of the open-circuit potential from 0.78 V at 500 µl min−1 to 0.58 V at 10 µl min−1 as observed in experiments. Decreasing the total flow rate 50 times from 500 µl min−1 to 10 µl min−1 only reduces the maximum power density approximately two times from 7.9 to 3.9 mW cm−2, while fuel utilization increases from 1.03% to 38.9% indicating a higher fuel utilization at low flow rates. Numerical simulation can be used for further optimization, to find a compromise between power density and fuel utilization.

บรรณานุกรม :
Shaegh, Seyed Ali Mousavi , Nguyen, Nam-Trung , Chan, Siew Hwa . (2553). An air-breathing microfluidic formic acid fuel cell with a porous planar anode : experimental and numerical investigations.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Shaegh, Seyed Ali Mousavi , Nguyen, Nam-Trung , Chan, Siew Hwa . 2553. "An air-breathing microfluidic formic acid fuel cell with a porous planar anode : experimental and numerical investigations".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Shaegh, Seyed Ali Mousavi , Nguyen, Nam-Trung , Chan, Siew Hwa . "An air-breathing microfluidic formic acid fuel cell with a porous planar anode : experimental and numerical investigations."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2553. Print.
Shaegh, Seyed Ali Mousavi , Nguyen, Nam-Trung , Chan, Siew Hwa . An air-breathing microfluidic formic acid fuel cell with a porous planar anode : experimental and numerical investigations. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2553.