Corrosion Resistance, Cell Performance and Long-term Stability of Metal Bipolar Plates for Direct Methanol Fuel Cell

2019 ◽  
Vol 25 (1) ◽  
pp. 861-867
Author(s):  
Young-chul Park ◽  
Dong-Hyun Peck ◽  
Doo-Hwan Jung ◽  
Sang-Kyung Kim ◽  
Seongyop Lim ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Fuel Cell ◽  
Direct Methanol Fuel Cell ◽  
Cell Performance ◽  
Bipolar Plates ◽  
Term Stability ◽  
Long Term Stability ◽  
Direct Methanol ◽  
Methanol Fuel Cell

Dynamic response and long-term stability of a small direct methanol fuel cell stack

2010 ◽  
Vol 195 (13) ◽  
pp. 4080-4089 ◽  
Author(s):  
Young-Chul Park ◽  
Dong-Hyun Peck ◽  
Sang-Kyung Kim ◽  
Seongyop Lim ◽  
Doo-Hwan Jung ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Dynamic Response ◽  
Direct Methanol Fuel Cell ◽  
Fuel Cell Stack ◽  
Term Stability ◽  
Long Term Stability ◽  
Direct Methanol ◽  
Methanol Fuel Cell

Direct methanol fuel cell performance of sulfonated polyimide membranes

2009 ◽  
Vol 194 (2) ◽  
pp. 674-682 ◽  
Author(s):  
Zhaoxia Hu ◽  
Takahiro Ogou ◽  
Makoto Yoshino ◽  
Otoo Yamada ◽  
Hidetoshi Kita ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Direct Methanol Fuel Cell ◽  
Cell Performance ◽  
Fuel Cell Performance ◽  
Sulfonated Polyimide ◽  
Direct Methanol ◽  
Methanol Fuel Cell ◽  
Polyimide Membranes

Study on a Vapor-Feed Air-Breathing Direct Methanol Fuel Cell Assisted by a Catalytic Combustor

2015 ◽  
Vol 12 (1) ◽  
Author(s):  
Wei Yuan ◽  
Hong-Rong Xia ◽  
Jin-Yi Hu ◽  
Zhao-Chun Zhang ◽  
Yong Tang
Keyword(s):  
Fuel Cell ◽  
Direct Methanol Fuel Cell ◽  
Cell Performance ◽  
Catalyst Loading ◽  
High Concentration ◽  
Methanol Vapor ◽  
Air Breathing ◽  
Direct Methanol ◽  
Catalytic Combustor ◽  
Methanol Fuel Cell

Feeding vaporized methanol to the direct methanol fuel cell (DMFC) helps reduce the effects of methanol crossover (MCO) and facilitates the use of high-concentration or neat methanol so as to enhance the energy density of the fuel cell system. This paper reports a novel system design coupling a catalytic combustor with a vapor-feed air-breathing DMFC. The combustor functions as an assistant heat provider to help transform the liquid methanol into vapor phase. The feasibility of this method is experimentally validated. Compared with the traditional electric heating mode, the operation based on this catalytic combustor results in a higher cell performance. Results indicate that the values of methanol concentration and methanol vapor chamber (MVC) temperature both have direct effects on the cell performance, which should be well optimized. As for the operation of the catalytic combustor, it is necessary to optimize the number of capillary wicks and also catalyst loading. In order to fast trigger the combustion reaction, an optimal oxygen feed rate (OFR) must be used. The required amount of oxygen to sustain the reaction can be far lower than that for methanol ignition in the starting stage.

A Model of a High-Temperature Direct Methanol Fuel Cell

2013 ◽  
Vol 10 (5) ◽  
Author(s):  
K. Scott ◽  
S. Pilditch ◽  
M. Mamlouk
Keyword(s):  
Fuel Cell ◽  
Direct Methanol Fuel Cell ◽  
Proton Exchange Membrane ◽  
Open Circuit ◽  
Proton Exchange ◽  
Cell Performance ◽  
Effect Of Temperature ◽  
Fuel Cell Performance ◽  
Direct Methanol ◽  
Methanol Fuel Cell

A steady-state, isothermal, one-dimensional model of a direct methanol proton exchange membrane fuel cell (PEMFC), with a polybenzimidazole (PBI) membrane, was developed. The electrode kinetics were represented by the Butler–Volmer equation, mass transport was described by the multicomponent Stefan–Maxwell equations and Darcy's law, and the ionic and electronic resistances described by Ohm's law. The model incorporated the effects of temperature and pressure on the open circuit potential, the exchange current density, and diffusion coefficients, together with the effect of water transport across the membrane on the conductivity of the PBI membrane. The influence of methanol crossover on the cathode polarization is included in the model. The polarization curves predicted by the model were validated against experimental data for a direct methanol fuel cell (DMFC) operating in the temperature range of 125–175 °C. There was good agreement between experimental and model data for the effect of temperature and oxygen/air pressure on cell performance. The fuel cell performance was relatively poor, at only 16 mW cm−2 peak power density using low concentrations of methanol in the vapor phase.

scholarly journals A Portable Direct Methanol Fuel Cell Power Station for Long-Term Internet of Things Applications

Energies ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3547
Author(s):  
Chung-Jen Chou ◽  
Shyh-Biau Jiang ◽  
Tse-Liang Yeh ◽  
Li-Duan Tsai ◽  
Ku-Yen Kang ◽  
...  
Keyword(s):  
Power Generation ◽  
Fuel Cell ◽  
Internet Of Things ◽  
Direct Methanol Fuel Cell ◽  
Large Scale ◽  
Outdoor Environment ◽  
Power Station ◽  
Direct Methanol ◽  
Methanol Fuel Cell

With regard to the best electro-chemical efficiency of an active direct methanol fuel cell (DMFC), the stacks and their balance of plant (BOP) are complex to build and operate. The yield of making the large-scale stacks is difficult to improve. Therefore, a portable power station made of multiple simpler planar type stack modules with only appropriate semi-active BOPs was developed. A planar stack and its miniature BOP components are integrated into a semi-active DMFC stack module for easy production, assembly, and operation. An improved energy management system is designed to control multiple DMFC stack modules in parallel to enhance its power-generation capacity and stability so that the portability, environmental tolerance, and long-term durability become comparable to that of the active systems. A prototype of the power station was tested for 3600 h in an actual outdoor environment through winter and summer. Its performance and maintenance events are analyzed to validate its stability and durability. Throughout the test, it maintained the daily average of 3.3 W power generation with peak output driving capability of 12 W suitable for Internet of Things (IoT) applications.

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