Operating Characteristics of a Direct Methanol Fuel Cell and Li-ion Battery Hybrid Power Sources

2008 ◽  
Keyword(s):  
Fuel Cell ◽  
Direct Methanol Fuel Cell ◽  
Li Ion Battery ◽  
Operating Characteristics ◽  
Power Sources ◽  
Hybrid Power ◽  
Direct Methanol ◽  
Li Ion ◽  
Methanol Fuel Cell

Evaluation of the Performance Characteristics of a Direct Methanol Fuel Cell With Multifuels

2010 ◽  
Vol 7 (4) ◽  
Author(s):  
Sujith Mohan ◽  
S. O. Bade Shrestha
Keyword(s):  
Fuel Cell ◽  
Direct Methanol Fuel Cell ◽  
Direct Methanol Fuel Cells ◽  
Operating Temperature ◽  
High Energy ◽  
High Energy Density ◽  
Power Sources ◽  
Transport Losses ◽  
Direct Methanol ◽  
Methanol Fuel Cell

Direct methanol fuel cells are one of the alternate power sources for the field of power electronics because of their high energy density. The benefits of a fuel cell toward the environment can be greatly improved if the fuel used for its application comes from renewable sources. In this study, the performance of a direct methanol fuel cell was investigated under five different methanol concentrations. The effect of methanol concentration on the cell operating temperature is studied. Impedance spectroscopy was conducted to measure the ohmic, activation, and mass transport losses for all concentrations. The cell performance was evaluated using methane and ethanol fuels and this was compared with methanol operation.

Evaluation of the Performance Characteristics of a Direct Methanol Fuel Cell With Multi Fuels

2009 ◽  
Author(s):  
Sujith Mohan ◽  
S. O. Bade Shrestha
Keyword(s):  
Fuel Cell ◽  
Direct Methanol Fuel Cell ◽  
Direct Methanol Fuel Cells ◽  
Operating Temperature ◽  
High Energy ◽  
High Energy Density ◽  
Power Sources ◽  
Transport Losses ◽  
Direct Methanol ◽  
Methanol Fuel Cell

Direct methanol fuel cells are one of the alternate power sources for the field of power electronics because of their high energy density. The benefits of a fuel cell towards the environment can be greatly improved if the fuel used for its application comes from renewable sources. In this study, the performance of a direct methanol fuel cell was investigated under five different methanol concentrations. The effect of methanol concentration on the cell operating temperature is studied. Impedance spectroscopy was conducted to measure the ohmic, activation and mass transport losses for all concentrations. The cell performance was evaluated using methane and ethanol fuels and this was compared with methanol operation.

Performance Analysis of a Direct Methanol Fuel Cell Stack With Bipolar Plate Incorporated With Innovative Flow-Field Combination

2014 ◽  
Vol 11 (3) ◽  
Author(s):  
Chia-Chieh Shen ◽  
Guo-Bin Jung ◽  
Feng-Bor Weng ◽  
Chia-Chen Yeh ◽  
Chih-Hung Lee ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Direct Methanol Fuel Cell ◽  
Direct Methanol Fuel Cells ◽  
Bipolar Plate ◽  
Published Data ◽  
Bipolar Plates ◽  
Operating Characteristics ◽  
Direct Methanol ◽  
The Impact ◽  
Methanol Fuel Cell

Increasing interest in utilizing direct methanol fuel cells for portable applications has prompted the need for understanding of their operating characteristics. Approximately 80% of a direct methanol fuel cell stack's volume and weight arise from the bipolar plates. The bipolar plates have grooved anode and cathode flow fields, and have a critical influence on the cell stack performance and stability. However, there is little published data regarding design expansion from single cell to stack, and literature regarding the fuel/oxidant distribution in each cell is especially scant. Hence, this topic is the subject of the present study, which reports the design of a complete direct methanol fuel cell consisting of five single cells including a graphite bipolar plate, as well as an innovative anode and cathode flow channel design. By observing variations in operating parameters, such as applied load and the flow of methanol solution and air, the impact of each parameter on the output performance and stability of the stack was investigated.

Development of a Silicon Based Air-Breathing Micro Direct Methanol Fuel Cell

2007 ◽  
Vol 329 ◽  
pp. 607-612
Author(s):  
Li Ding Wang ◽  
Jun Sheng Liang ◽  
C. Liu ◽  
Gong Quan Sun
Keyword(s):  
Fuel Cell ◽  
Direct Methanol Fuel Cell ◽  
Mems Devices ◽  
Ambient Conditions ◽  
Peak Current Density ◽  
Power Sources ◽  
Air Breathing ◽  
Direct Methanol ◽  
Silicon Based ◽  
Methanol Fuel Cell

As one part of the efforts to break the bottleneck of power sources in development of integrated micro systems, a silicon based air-breathing micro direct methanol fuel cell (μDMFC) was developed in this work. By using micro-machining technologies compatible with that in processing of the other MEMS devices, the anode and cathode micro flow-field plates had been successfully fabricated on a pair of 2-inch silicon wafers. The silicon μDMFC was evaluated under ambient conditions using aqueous methanol solution with different concentrations. Results show that open circuit potential (OCP) of the μDMFC was above to 0.6 V, and by using 3mol/L methanol, the peak current density and power density of the silicon μDMFC could reach 28mA/cm2 and 8mW/cm2, respectively.

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