Cations Diffusion in Nafion117 Membrane of Microbial fuel cells

Huang, Dong; Song, Bing-Ye; Ren, Qinlong; Yao, Sen

doi:10.1016/j.electacta.2017.06.004

Cited by 32 publications

(10 citation statements)

References 28 publications

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“…100 heating ramps per cycle and 1000 dynamics steps per ramp are used. During the annealing process, the Nose-Hoover thermostat was used to control the temperature of the system in a range of 298 K to 698 K [24].…”

Section: Molecular Dynamics Methodsmentioning

confidence: 99%

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Molecular dynamics simulation of alkaline electrolyte diffusion in anion exchange membrane

Song

et al. 2020

Sci. China Technol. Sci.

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During the operation of alkaline direct liquid fuel cells, the alkaline electrolyte is usually needed in the anode electrode to accelerate the electrochemical reaction kinetics of the liquid fuel. However, the crossover of the alkaline solution in the anode through the anion exchange membrane to the cathode can increase the transfer resistance of the oxygen in the cathode. In order to reduce the crossover of the alkaline solution, the diffusion process of the alkaline solution in the anion exchange membrane needs to be fully understood. In this work, interface models of anion exchange membrane-alkaline electrolytes are established based on the cell structure of the quaternary ammonium polysulfone (QAPS) membrane to simulate the dynamic process of the alkaline solution in the membrane. The effect of the type and the concentration of the alkaline solution on the transportation of the metal ions and OH − in the membrane are studied. The results show that the agglomeration of Na + is formed more easily than K + in the interface model. Because of the strong interaction of Na + on OH − , OH − ions appear to be concentrated, resulting in that the diffusion coefficients of the metal ion and OH − in the in Na + solution are lower than those in the K + solution. In addition, with the raised concentration of electrolyte solution, the aggregation degrees of the metal ions and OH − can be increased, which means an enlarged mass transfer resistance of the components. Furthermore, by adding a polytetrafluoroethylene (PTFE) layer on the QAPS membrane, the distribution of metal ions tends to be concentrated, and the number of hydrophilic channels in the QAPS membrane is reduced, which significantly increases the alkali resistance of the anion exchange membrane.direct liquid fuel cells, anion exchange membrane, alkali crossover, QAPS membrane

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Section: Molecular Dynamics Methodsmentioning

confidence: 99%

“…The distribution characteristics of other particles around a particle were obtained by the radial distribution function (as shown in eq. ( 6) [24]), which was helpful to explore the effect of the particle interactions on the mass transfer of OH − ions.…”

Section: Molecular Dynamics Methodsmentioning

confidence: 99%

Molecular dynamics simulation of alkaline electrolyte diffusion in anion exchange membrane

Song

et al. 2020

Sci. China Technol. Sci.

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“…It appears logical to conclude that ionic conductivity of membranes in different ionic forms should correlate with the mobility of water molecules. Even more surprising is that for membranes kept at the same relative humidity, the dependence of the conductivity on the cation radius is strictly opposite ( Figure 2 ) [ 101 , 102 , 103 , 104 ]. The water absorption of membranes at equivalent relative humidity is directly related to the polarizing power of an ion and decreases when increasing the radius of the alkali metal cation [ 102 , 104 , 105 , 106 ].…”

Section: Hydration and Mobility Of Cations In Membranesmentioning

confidence: 99%

Ionic Mobility in Ion-Exchange Membranes

Стенина

Yaroslavtsev

2021

Membranes

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Membrane technologies are widely demanded in a number of modern industries. Ion-exchange membranes are one of the most widespread and demanded types of membranes. Their main task is the selective transfer of certain ions and prevention of transfer of other ions or molecules, and the most important characteristics are ionic conductivity and selectivity of transfer processes. Both parameters are determined by ionic and molecular mobility in membranes. To study this mobility, the main techniques used are nuclear magnetic resonance and impedance spectroscopy. In this comprehensive review, mechanisms of transfer processes in various ion-exchange membranes, including homogeneous, heterogeneous, and hybrid ones, are discussed. Correlations of structures of ion-exchange membranes and their hydration with ion transport mechanisms are also reviewed. The features of proton transfer, which plays a decisive role in the membrane used in fuel cells and electrolyzers, are highlighted. These devices largely determine development of hydrogen energy in the modern world. The features of ion transfer in heterogeneous and hybrid membranes with inorganic nanoparticles are also discussed.

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“…23 Floating type an another classification used as an innovative approach for supplying power to remote environmental sensors and for low cost data transmittance. 24 Yet the MFC system has certain limitations which require extensive research like oxygen diffusion, cation diffusion, 25 high cost of proton exchange membrane etc. The interaction of bacterial consortium with the anode is a very complex chemical relation that exist between biological and electro-chemical system.…”

Section: Introductionmentioning

confidence: 99%

Microbial fuel cell: a prospective sustainable solution for energy and environmental crisis

Mukherjee

Mishra

Saravanan

2018

IJBSBE

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The microbial fuel cell (MFC) a classification of fuel cell has attracted wide research attention for resolving the emerging energy and environmental crisis of present and future generation. Owing to its strong compliances towards sustainable development goal and safety it is seen as a promising substitution for the polluting technologies. Though this technology has seen tremendous growth in their own technological competence their commercialisation is unrealistic on instantaneous adaptation. The opinion covers the protagonist role of MFC in providing solution to the energy and environmental problems along with its limitations and its competence for future real time application.

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Cations Diffusion in Nafion117 Membrane of Microbial fuel cells

Cited by 32 publications

References 28 publications

Molecular dynamics simulation of alkaline electrolyte diffusion in anion exchange membrane

Molecular dynamics simulation of alkaline electrolyte diffusion in anion exchange membrane

Ionic Mobility in Ion-Exchange Membranes

Microbial fuel cell: a prospective sustainable solution for energy and environmental crisis

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