Effect of Flow Fields and Scan Rates on Performance of Micro-DMFC

2010 ◽  
Vol 654-656 ◽  
pp. 2879-2882
Author(s):  
Yu Hao Lu ◽  
Ramana G. Reddy
Keyword(s):  
Fuel Cells ◽  
Power Density ◽  
Direct Methanol Fuel Cells ◽  
Flow Fields ◽  
Maximum Power ◽  
Maximum Power Density ◽  
Bipolar Plates ◽  
Narrow Channels ◽  
Direct Methanol ◽  
Mems Technology

A micro-DMFC is a promising power source to substitute the lithium battery and used in the portable electronic devices. In this study, the effect of four types of flow fields of bipolar plates in a micro-direct methanol fuel cells (micro-DMFCs) on their performance were experimentally investigated. MEMS technology was applied in fabrication of micro-channel for the micro-DMFCs. The effect of the type of flow field design on the performance of micro-DMFCs was electrochemically evaluated for the four types of flow fields. The micro-DMFCs with double-channel serpentine presented the highest maximum power density and the micro-fuel cells with mixed multi-channel serpentine with narrow channels had the lowest maximum power density.

Increasing the Operating Temperature of Nafion Membranes with Addition of Nanocrystalline Oxides for Direct Methanol Fuel Cells

2002 ◽  
Vol 756 ◽  
Author(s):  
Vincenzo Baglio ◽  
Alessandra Di Blasi ◽  
Antonino S. Arico' ◽  
Vincenzo Antonucci ◽  
Pier Luigi Antonucci ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Power Density ◽  
Direct Methanol Fuel Cells ◽  
Maximum Power ◽  
Nafion Membrane ◽  
Membrane Electrode ◽  
Maximum Power Density ◽  
Nafion Membranes ◽  
Direct Methanol ◽  
Methanol Fuel Cells

ABSTRACTComposite Nafion membranes containing various amounts of TiO2 (3%, 5% and 10%) were prepared by using a recast procedure for application in high temperature Direct Methanol Fuel Cells (DMFCs). The electrochemical behaviour was compared to that of a membrane-electrode assembly (MEA) based on a bare recast Nafion membrane. All the MEAs containing the Nafion-titania membranes were able to operate up to 145°C, whereas the assembly equipped with the bare recast Nafion membrane showed the maximum performance at 120°C. A maximum power density of 340 mW cm-2 was achieved at 145°C with the composite membrane in the presence of oxygen feed, whereas the maximum power density with air feed was about 210 mW cm-2.

Characterization of electroless Ni-based alloys for use in bipolar plates of direct methanol fuel cells

2010 ◽  
Vol 205 (7) ◽  
pp. 2251-2255 ◽  
Author(s):  
Jeng-Yu Lin ◽  
Che-Yu Lin ◽  
Shih-Kang Liu ◽  
Chi-Chao Wan ◽  
Yung-Yun Wang
Keyword(s):  
Fuel Cells ◽  
Direct Methanol Fuel Cells ◽  
Bipolar Plates ◽  
Direct Methanol ◽  
Methanol Fuel Cells ◽  
Electroless Ni

Assessment of different bio-inspired flow fields for direct methanol fuel cells through 3D modeling and experimental studies

2018 ◽  
Vol 43 (2) ◽  
pp. 1152-1170 ◽  
Author(s):  
David Ouellette ◽  
Adnan Ozden ◽  
Mustafa Ercelik ◽  
C. Ozgur Colpan ◽  
Hadi Ganjehsarabi ◽  
...  
Keyword(s):  
Fuel Cells ◽  
3D Modeling ◽  
Direct Methanol Fuel Cells ◽  
Experimental Studies ◽  
Flow Fields ◽  
Direct Methanol ◽  
Methanol Fuel Cells

Innovative Flow-Field Combination Design on Direct Methanol Fuel Cell Performance

2006 ◽  
Vol 4 (3) ◽  
pp. 365-368 ◽  
Author(s):  
Guo-Bin Jung ◽  
Ay Su ◽  
Cheng-Hsin Tu ◽  
Fang-Bor Weng ◽  
Shih-Hung Chan
Keyword(s):  
Fuel Cells ◽  
Flow Field ◽  
Direct Methanol Fuel Cells ◽  
Flow Fields ◽  
Cell Performance ◽  
Fuel Cell Performance ◽  
Serpentine Flow Field ◽  
Structure Of Flow ◽  
Direct Methanol ◽  
Stable Performance

The flow-field design of direct methanol fuel cells (DMFCs) is an important subject about DMFC performance. Flow fields play an important role in the ability to transport fuel and drive out the products (H2O,CO2). In general, most fuel cells utilize the same structure of flow field for both anode and cathode. The popular flow fields used for DMFCs are parallel and grid designs. Nevertheless, the characteristics of reactants and products are entirely different in anode and cathode of DMFCs. Therefore, the influences of flow fields design on cell performance were investigated based on the same logic with respect to the catalyst used for cathode and anode nonsymmetrically. To get a better and more stable performance of DMFCs, three flow fields (parallel, grid, and serpentine) utilized with different combinations were studied in this research. As a consequence, by using parallel flow field in the anode side and serpentine flow-field in the cathode, the highest power output was obtained.

Sulfonated polyether ether ketone/strontium zirconite@TiO2 nanocomposite membranes for direct methanol fuel cells

2017 ◽  
Vol 5 (38) ◽  
pp. 20497-20504 ◽  
Author(s):  
G. Gnana kumar ◽  
Arumugam Manthiram
Keyword(s):  
Fuel Cells ◽  
Power Density ◽  
Direct Methanol Fuel Cells ◽  
Inorganic Filler ◽  
Nanocomposite Membranes ◽  
Polyether Ether Ketone ◽  
Sulfonated Polyether Ether Ketone ◽  
Direct Methanol ◽  
Ether Ketone ◽  
Methanol Fuel Cells

The use of SrZrO3@TiO2 nanocuboids as an inorganic filler in SPEEK membranes enhances their performance in DMFCs with a power density higher than that achieved with a Nafion 117 membrane.

scholarly journals Natural Wolframite Used as Cathode Photocatalyst for Improving the Performance of Microbial Fuel Cells

2018 ◽  
Vol 8 (12) ◽  
pp. 2504
Author(s):  
Junxian Shi ◽  
Anhuai Lu ◽  
Haibin Chu ◽  
Hongyu Wu ◽  
Hongrui Ding
Keyword(s):  
Fuel Cells ◽  
Power Density ◽  
Microbial Fuel Cells ◽  
Environmental Remediation ◽  
Low Cost ◽  
Reduction Process ◽  
Maximum Power ◽  
Maximum Power Density ◽  
Graphite Cathode ◽  
Vis Spectroscopy

Developing simple and cheap electrocatalysts or photocatalysts for cathodes to increase the oxygen reduction process is a key factor for better utilization of microbial fuel cells (MFCs). Here, we report the investigation of natural wolframite employed as a low-cost cathode photocatalyst to improve the performance of MFCs. The semiconducting wolframite was characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and Raman spectroscopy. The band gap and photo respond activities were determined by UV-vis spectroscopy and linear sweep voltammetry (LSV), respectively. Compared with the normal graphite cathode, when MFCs were equipped with a wolframite-coated cathode, the maximum power density was increased from 41.47 mW·m−2 to 95.51 mW·m−2. Notably, the maximum power density further improved to 135.57 mW·m−2 under light irradiation, which was 2.4 times higher than with a graphite cathode. Our research demonstrated that natural wolframite, a low-cost and abundant natural semiconducting mineral, showed promise as an effective photocathode catalyst which has great potential applications related to utilizing natural minerals in MFCs and for environmental remediation by MFCs in the future.

Pt–CoP/C as an alternative PtRu/C catalyst for direct methanol fuel cells

2016 ◽  
Vol 4 (47) ◽  
pp. 18607-18613 ◽  
Author(s):  
Jinfa Chang ◽  
Ligang Feng ◽  
Kun Jiang ◽  
Huaiguo Xue ◽  
Wen-Bin Cai ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Power Density ◽  
Methanol Oxidation ◽  
Direct Methanol Fuel Cells ◽  
Direct Methanol ◽  
Methanol Fuel Cells

A novel Pt–CoP/C electrocatalyst was developed for direct methanol fuel cells. This catalyst showed superior power density to commercial Pt/C and PtRu/C catalysts. In situ ATR-SEIRAS technology revealed that the presence of CoP in the Pt-based catalyst can promote the methanol oxidation to final CO2 products.

Innovative Flow Field Combination Design on Direct Methanol Fuel Cell Performance

2005 ◽  
Author(s):  
Guo-Bin Jung ◽  
Ay Su ◽  
Cheng-Hsin Tu ◽  
Fang-Bor Weng ◽  
Shih-Hung Chan
Keyword(s):  
Fuel Cells ◽  
Flow Field ◽  
Direct Methanol Fuel Cells ◽  
Flow Fields ◽  
Cell Performance ◽  
Fuel Cell Performance ◽  
Serpentine Flow Field ◽  
Structure Of Flow ◽  
Direct Methanol ◽  
Stable Performance

The flow-field design of Direct Methanol Fuel Cells (DMFCs) is an important subject about the DMFCs performance. Flow-fields play an important role on ability to transport fuel and drive out the products (H2O, CO2). In general, most of fuel cells utilize the same structure of flow-field for both anode and cathode. The popular flow-fields used for DMFCs are parallel and grid designs. Nevertheless, the characteristics of reactants and products are entirely different in anode and cathode of DMFCs. Therefore; the influences of the flow-fields designs on the cell performance were investigated due to the same logic for catalyst used for cathode and anode differently. To get the better and more stable performance of DMFC, three flow-fields (Parallel, Grid and Serpentine) are utilized with different combination were studied in this research. As a consequence, by using parallel flow-field in anode side and serpentine flow -field in cathode, the most and highest power output was obtained.

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