Enhanced performance of a direct methanol alkaline fuel cell (DMAFC) using a polyvinyl alcohol/fumed silica/KOH electrolyte

Lue, Shingjiang Jessie; Wang, Wei‐Ting; Mahesh, K.P.O.; Yang, Chun‐Chen

doi:10.1016/j.jpowsour.2010.06.049

Cited by 58 publications

(54 citation statements)

References 45 publications

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“…Next to the flow-field plates, two gold-plated copper end plates were used as current collectors and assembled. For temperature control, two heating tapes were adhered to the end plate surfaces [38]. The humidified oxygen gas was fed into the cathode (flow rate of 180 mL·min −1 ), and the thermostated formic acid solution was fed into the anode side (flow rate of 3 mL·min −1 ).…”

Section: Resultsmentioning

confidence: 99%

“…The electrochemical analysis of the DFAFCs were measured using a constant current density mode with a potentiostat (PGSTAT-30, MetrohmAutolab B.V., Utrecht, The Netherlands). The experimental set-up of the single cell performance was described in previous reports [38,39,44,45]. The different parameters of cell temperature ranged from 30 °C to 80 °C and a formic acid concentration from 1 M to 5 M. In the first set of experiments (1-2 M), the voltage lower limit was set at 0.45 V, but was changed to 0.1-0.2 V in subsequent experiments.…”

Section: Resultsmentioning

confidence: 99%

“…The electrolyte membrane was immersed in DI water and formic acid solutions at different temperatures for 3 h and placed between two stainless steel electrode rods in a T-tube glass, as illustrated in our previous report [38][39][40]. The membrane was maintained at 98% relative humidity at a fixed temperature for the proton conductivity analysis.…”

Section: Conductivity and Formic Acid Permeability Measurementsmentioning

confidence: 99%

“…Nyquist plots were employed to analyze the conductivity of the electrolytic membrane, as illustrated in our previous work [38,41].…”

Section: Conductivity and Formic Acid Permeability Measurementsmentioning

confidence: 99%

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Experimental and One-Dimensional Mathematical Modeling of Different Operating Parameters in Direct Formic Acid Fuel Cells

et al. 2017

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Abstract:The purpose of this work is to develop a one-dimensional mathematical model for predicting the cell performance of a direct formic acid fuel cell and compare this with experimental results. The predicted model can be applied to direct formic acid fuel cells operated with different formic acid concentrations, temperatures, and with various electrolytes. Tafel kinetics at the electrodes, thermodynamic equations for formic acid solutions, and the mass-transport parameters of the reactants are used to predict the effective diffusion coefficients of the reactants (oxygen and formic acid) in the porous gas diffusion layers and the associated limiting current densities to ensure the accuracy of the model. This model allows us to estimate fuel cell polarization curves for a wide range of operating conditions. Furthermore, the model is validated with experimental results from operating at 1-5 M of formic acid feed at 30-80 • C, and with Nafion-117 and silane-crosslinked sulfonated poly(styrene-ethylene/butylene-styrene) (sSEBS) membrane electrolytes reinforced in porous polytetrafluoroethylene (PTFE). The cell potential and power densities of experimental outcomes in direct formic acid fuel cells can be adequately predicted using the developed model.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Conductivity and Formic Acid Permeability Measurementsmentioning

confidence: 99%

“…Nyquist plots were employed to analyze the conductivity of the electrolytic membrane, as illustrated in our previous work [38,41].…”

Section: Conductivity and Formic Acid Permeability Measurementsmentioning

confidence: 99%

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Experimental and One-Dimensional Mathematical Modeling of Different Operating Parameters in Direct Formic Acid Fuel Cells

et al. 2017

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“…Poly(vinyl alcohol) (PVA) has good film-forming property to assemble efficient electrolyte and good stability after doping with a potassium hydroxide (KOH) solution [6,10]. This PVA membrane separator has been well established for various alkaline batteries and fuel cells [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Surfactant-Assisted Perovskite Nanofillers Incorporated in Quaternized Poly (Vinyl Alcohol) Composite Membrane as an Effective Hydroxide-Conducting Electrolyte

Kumar

et al. 2017

Energies

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Perovskite LaFeO 3 nanofillers (0.1%) are incorporated into a quaternized poly(vinyl alcohol) (QPVA) matrix for use as hydroxide-conducting membranes in direct alkaline methanol fuel cells (DAMFCs). The as-synthesized LaFeO 3 nanofillers are amorphous and functionalized with cetyltrimethylammonium bromide (CTAB) surfactant. The annealed LaFeO 3 nanofillers are crystalline without CTAB. The QPVA/CTAB-coated LaFeO 3 composite membrane shows a defect-free structure while the QPVA/annealed LaFeO 3 film has voids at the interfaces between the soft polymer and rigid nanofillers. The QPVA/CTAB-coated LaFeO 3 composite has lower methanol permeability and higher ionic conductivity than the pure QPVA and QPVA/annealed LaFeO 3 films. We suggest that the CTAB-coated LaFeO 3 provides three functions to the polymeric composite: increasing polymer free volume, ammonium group contributor, and plasticizer to enhance the interfacial compatibility. The composite containing CTAB-coated LaFeO 3 results in superior cell performance. A maximum power density of 272 mW cm −2 is achieved, which is among the highest power outputs reported for DAMFCs in the literature.

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Quaternized poly(phenylene oxide) anion exchange membrane for alkaline direct methanol fuel cells in KOH‐free media

Gopi

Bhat

Sahu

et al. 2016

J of Applied Polymer Sci

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A series of anion exchange membrane (AEM) electrolytes with quaternary ammonium moiety are fabricated from poly (phenylene oxide) for its application in alkaline direct methanol fuel cells (ADMFCs). In the first step, poly(phenylene oxide) (PPO) is successfully chloromethylated by substituting chloromethyl groups in the aryl position of polymer. In the second step, the chloromethylated PPO (CPPO) is further homogeneously quaternized and ion-exchanged to form an AEM. From the second step, series of AEMs are prepared by changing the mole ratio of amine in relation to CPPO. The presence of quaternary ammonium group in the membrane was confirmed by elemental analysis. The fabricated membranes are subjected to cell polarization studies in ADMFCs, wherein quaternized poly(2,6-dimethyl-1,4-phenylene oxide) (CPPO:amine of 1:8) membrane exhibits higher peak power density of 3.5 mW cm 22 when compared with the other ratios of CPPO:amine in the absence of KOH solution.

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Enhanced performance of a direct methanol alkaline fuel cell (DMAFC) using a polyvinyl alcohol/fumed silica/KOH electrolyte

Cited by 58 publications

References 45 publications

Experimental and One-Dimensional Mathematical Modeling of Different Operating Parameters in Direct Formic Acid Fuel Cells

Experimental and One-Dimensional Mathematical Modeling of Different Operating Parameters in Direct Formic Acid Fuel Cells

Surfactant-Assisted Perovskite Nanofillers Incorporated in Quaternized Poly (Vinyl Alcohol) Composite Membrane as an Effective Hydroxide-Conducting Electrolyte

Quaternized poly(phenylene oxide) anion exchange membrane for alkaline direct methanol fuel cells in KOH‐free media

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