New approaches towards novel composite and multilayer membranes for intermediate temperature-polymer electrolyte fuel cells and direct methanol fuel cells

Branco, Carolina Musse; Sharma, Sathyashankara; Forte, Maria Madalena de Camargo; Steinberger‐Wilckens, Robert

doi:10.1016/j.jpowsour.2016.03.052

Cited by 120 publications

(52 citation statements)

References 135 publications

(167 reference statements)

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“…In this way, the ionic resistance of the membrane is reduced [7]. However, to allow the humidification of the membranes and avoid the degradation of them, it is of highly importance to control the temperature and dissipate the excess of heat through the cooling system [8]. To do that, water is pumped from the water tank into the stack, absorbing heat from it.…”

Section: Description Of Hp600 Systemmentioning

confidence: 99%

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Modelling and Parameterization of Resistive Superconducting Fault Current Limiters

Asensio¹,

Martín²,

Zamora³

et al. 2024

RE&PQJ

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Abstract. This paper focuses on the thermal modelling of a CHP system based on Proton Exchange Membrane Fuel Cell (PEMFC) by experimental analysis and analytical relationships. To this end, there have been carried out several experimental tests on a PEMFC 600 W of electrical power in order to obtain the necessary data for thermal modelling and its subsequent validation. Once made the experimental analysis, data obtained have been used to develop the thermal model of the stack of the fuel cell as well as the entire temperature management system, by implementing various analytical relationships in the MATLAB/Simulink environment.The model obtained has allowed to characterize the thermal behaviour of the fuel cell to different profiles of electrical and thermal energy demand, with a minimum and maximum relative error in the temperature of the stack of 3.77% and 11.05%, respectively.

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Section: Description Of Hp600 Systemmentioning

confidence: 99%

“…Finally, the term has been calculated by equation (8), given as: All variables are fully defined except coolant inlet temperature ( ). For this, a forced convection correlation has been used, known as temperature increase in contact with a constant temperature surface (9):…”

Section: Thermal Modellingmentioning

confidence: 99%

Modelling and Parameterization of Resistive Superconducting Fault Current Limiters

Asensio¹,

Martín²,

Zamora³

et al. 2024

RE&PQJ

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“…Inorganic fillers in the polymer membrane have been reported to enhance the ionic conductivity and separation of reactants due to a range of chemical and physical properties . Although the single layer 2D materials exhibit exciting performance in electrochemical devices, achieving those as membranes have several drawbacks such as low yield, demand for sophisticated technologies and complicated transfer processes.…”

Section: D Materials For Ion Exchange Membranesmentioning

confidence: 99%

Single Layer 2D Crystals for Electrochemical Applications of Ion Exchange Membranes and Hydrogen Evolution Catalysts

Pérez-Page

Sahoo

Holmes

2019

Adv Materials Inter

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to be generated in an environmentally benign manner.Fuel cells are electrochemical devices which convert the chemical energy produced by an electrochemical reaction into electricity. Polymer electrolyte membrane fuel cells (PEMFCs) are one of the most promising systems, and they have been used for stationary and automobile applications as well as for small scale portable devices. Hydrogen as a fuel and oxygen as an oxidant are the most common reactants used for these fuel cells. Other fuels such as methanol and formic acid are also used in PEMFC. The heart of fuel cells is the membrane electrode assembly (MEA) which is composed of two electrodes, the anode and the cathode, and the electrolyte. The electrolyte is a proton exchange membrane (PEM) which allows protons to pass through from anode to cathode side. The membrane needs to have high proton conductivity, electrical insulation, thermal and mechanical strength; it needs to be light weight, flexible, have low permeability to reactant species, resistance to fuel transport, highly durable and facilitate quick electrode kinetics, suitable for use with different fuels, and low in cost. The electrolyte in a fuel cell has three main functions, to act as ion conductor, electronic insulator, and a separator for the reactant gases. [4] Nafion is the most widely used polymeric membrane in PEMFC. It has a particular structure which requires hydration leading to high proton conductivity. It cannot be used at temperatures beyond 100 °C since the proton conductivity decrease when Nafion is not perfectly hydrated. Another drawback of Nafion is fuel crossover, which is the permeability of the fuel from the anode side to the cathode side leading to a decrease in the efficiency of the fuel cell. This particular problem is more significant in direct methanol fuel cells (DMFC) which use methanol as a fuel which can easily permeate through Nafion. In all fuels contexts, great efforts have been made to find a new electrolyte membrane which can replace Nafion, and 2D materials can play an important role in this.Graphene is the name given to a flat monolayer of carbon with a 2D honeycomb lattice and is the basic building block for graphitic materials of all other dimensionalities. [5] It has particular properties such as notably high surface area around 2630 m 2 g −1 , [1,6] exceptionally high electrical conductivity, 104.36 S cm −1 , [1,7] high flexural strength, 44.28 MPa, [1,8] and good chemical and thermal stability, [1,9] which make it a potential material for a large number of applications.The isolation of graphene is considered as the beginning of a new generation of 2D materials and 2D crystals. Because of their particular layered structure, with planar topology and a thickness from single to few atomic layers, which provide them with unique properties, 2D material are expected to have important applications in the next generation of energy systems. Electrochemical energy storage devices such as batteries or supercapacitors have already incorporated these materials as electro...

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“…Although their results turn out that the peak power density and efficiency of this cell are enhanced because of the reduced MCO, adopting thicker membrane simultaneously leads to high ohmic impedance. With regard to the membrane amelioration methods, there are composite membrane and multilayer membrane . Composite membrane is normally fabricated through adding various organic , or inorganic fillers into the Nafion matrix, which improves polymer properties to lower methanol permeability but generally results in a drop of proton conductivity.…”

Section: Introductionmentioning

confidence: 99%

Experimental Studies on the Performances of a Direct Methanol Fuel Cell with a Novel Integrated Ultrasonic Atomization Fuel Feeder

Gong

et al. 2020

Fuel Cells

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With the advantages of high energy density and low operating temperature, direct methanol fuel cell (DMFC) has been rated as the most promising portable energy device to replace the traditional lithium cell. However, the development of DMFC is limited by methanol crossover (MCO) and catalyst poisoning. To alleviate MCO, a DMFC with an integrated ultrasonic atomization fuel feeder is proposed in the present research. The open circuit voltage (OCV) and the polarization curves of the cell under a series of conditions are analyzed. The performances of the proposed DMFC are evaluated at different methanol concentrations and fuel feed rates. The mechanism of MCO is discussed from above experiments.Compared with liquid feed style, atomization feed style can reduce characteristic response time (CRT) and greatly alleviate MCO because the DMFC obtains a larger OCV value. It can be found from our experiments that atomization feed style can effectively improve cell performance and energy density. Moreover, atomization feed style under different methanol concentrations can obtain the best cell performance by adjusting feed rate. When the feed rate is 0.24 mL min -1 and 0.6 mL min -1 , the best cell performance is obtained at 8M and 4M, respectively.

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New approaches towards novel composite and multilayer membranes for intermediate temperature-polymer electrolyte fuel cells and direct methanol fuel cells

Cited by 120 publications

References 135 publications

Modelling and Parameterization of Resistive Superconducting Fault Current Limiters

Modelling and Parameterization of Resistive Superconducting Fault Current Limiters

Single Layer 2D Crystals for Electrochemical Applications of Ion Exchange Membranes and Hydrogen Evolution Catalysts

Experimental Studies on the Performances of a Direct Methanol Fuel Cell with a Novel Integrated Ultrasonic Atomization Fuel Feeder

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