Nafion/Pd–SiO2 nanofiber composite membranes for direct methanol fuel cell applications

Thiam, Hui San; Daud, Wan Ramli Wan; Kamarudin, S.K.; Mohamad, Abu Bakar; Kadhum, Abdul Amir H.; Loh, Kee Shyuan; Majlan, Edy Herianto

doi:10.1016/j.ijhydene.2012.11.141

Cited by 99 publications

(46 citation statements)

References 49 publications

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“…This phenomenon was explained by the size mismatching of the ions with the cavity surrounded by the ether and ester groups [29]. Since the inner diameter of pillar [5]arene is only about 6.5 A [30], which is about one order of magnitude smaller than that of inorganic nanomaterials [16,17,21], we hypothesized that methanol molecules (diameter~2.8 A) would thus experience a much larger resistance to pass through the pillar [5]arenes compared to H 3 O þ molecules (diameter~1.6 A). Therefore, pillar [5]arenes have the potential to selectively conduct protons over methanol.…”

Section: Introductionmentioning

confidence: 99%

Novel sulfonated Nafion®-based composite membranes with pillararene as selective artificial proton channels for application in direct methanol fuel cells

Shen

Sun

Chu

et al. 2015

International Journal of Hydrogen Energy

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Section: Introductionmentioning

confidence: 99%

Novel sulfonated Nafion®-based composite membranes with pillararene as selective artificial proton channels for application in direct methanol fuel cells

Shen

Sun

Chu

et al. 2015

International Journal of Hydrogen Energy

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“…The sample were immersed in a 1.0 M NaCl solution for 2 hours followed by titration with a 0.01 M NaOH solution using phenolphthalein as an indicator [9]. The IEC values were calculated from the titration data using Equation 2:…”

Section: Methodsmentioning

confidence: 99%

Synthesis and Characterisation of Chitosan-Cellulose Biocomposite Membrane for Fuel Cell Applications

Rahman

Loh

Mohamad³

et al. 2016

MJAS

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In this work, proton exchange membranes (PEMs) based on chitosan (CS) and cellulose (CL) have been prepared using a solution-casting technique with sulfosuccinic acid (SSA) as an ionic cross linker. The characteristics of these CS-CL biocomposite membranes were studied using scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), electrochemical impedance spectroscopy (EIS) in addition to the measurement of the water uptake rate (WUR) and the ion exchange capacity (IEC). The results indicate that the amount of SSA used in this study played a significant role in the proton conduction of the membrane. The proton conductivity of a cross-linked CS-CL membrane was on the order of 10 -5 S cm -1 , which is greater than the proton conductivity of a pure CS membrane.Keywords: proton exchange membranes, chitosan, cellulose, biocomposite, membrane Abstrak Dalam kajian ini, membran penukaran proton (PEM) berasaskan kitosan (CS) dan selulosa (CL) telah disediakan dengan menggunakan teknik tuangan larutan bersama dengan asid sulfosusinik (SSA) yang berfungsi sebagai pemaut silang ion. Sifat membran biokomposit CS-CL ini dikaji menggunakan mikroskopik pengimbas elektron (SEM), spektroskopi inframerah transformasi Fourier (FTIR), spektrometer elektrokimia impedans (EIS) sebagai tambahan kepada pengukuran kadar penyerapan air (WUR) dan kapasiti penukaran ion (IEC). Keputusan menunjukkan bahawa jumlah SSA digunakan dalam kajian ini memainkan peranan penting dalam pengangkutan proton di dalam membran. Kekonduksian proton untuk CS-CL bertaut silang membran yang diperoleh adalah di dalam lingkungan 10 -5 S cm -1 , iaitu lebih tinggi berbanding dengan kekonduksian proton membran CS tulen.

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“…Incorporating a hydrophilic, inorganic material into the perfluorinated polymer is an alternative way to increase the binding energy of water [7]. The membrane strength and performance increased, as the organic polymer formed strong interaction with the inorganic component having large specific area [8].…”

Section: -2506mentioning

confidence: 99%

Thermal Properties and Conductivity of Nafion-Zirconia Composite Membrane

Mokhtaruddin

Mohamad

Loh³

et al. 2016

MJAS

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The application of composite membranes for high temperature polymer electrolyte membrane fuel cell has attracted interests. Nafion-metal dioxide composite membranes are considered among the research niche. In this study, Nafion membranes and Nafion-zirconia composite membranes with 1, 3 and 5 wt. % of hydrous zirconia were prepared accordingly. All membranes were characterized by quantitative analysis techniques such as thermogravimetry analyse, diffraction scanning calorimetry and Fourier transform infrared. All composite membranes showed high glass transition temperatures and improved water retention properties, compared to the Nafion membrane. The composite membrane with 3 wt. % of zirconia showed the highest thermal resistance at 90°C.Keywords: high temperature PEM, glass transition temperature, conductivity, composite membrane, Nafion-zirconia Abstrak Penggunaan membran komposit dalam operasi sel bahanapi membran penukar proton pada suhu tinggi semakin mendapat perhatian pengkaji. Membran komposit Nafion-logam dioksida adalah antara bidang kajian dalam kumpulan ini. Bagi kajian ini, membran Nafion dan membran komposit Nafion-zirkonia dengan 1, 3, dan 5 wt. % telah disediakan. Kesemua membran dicirikan menggunakan teknik analisis kuantitatif seperti analisis termogravimetri, kalorimetri imbasan kerbedaan dan Fourier inframerah. Kesemua membran komposit mempunyai suhu peralihan kaca yang tinggi dan keupayaan penahanan air yang lebih baik berbanding membran Nafion. Membran komposit dengan 3 wt. % zirkonia menunjukkan ketahanan suhu tinggi pada suhu operasi 90°C.Kata kunci: PEM suhu tinggi, suhu peralihan kaca, konduktiviti, membran komposit, Nafion-zirkonia Introduction Fuel cells are electrochemical devices which convert the energy from the reaction of fuel and oxygen into electric energy continuously with water and CO 2 as the byproducts [1]. Polymer electrolyte membrane fuel cell (PEMFC) is one of the fuel cell types, for temperature ranging from 60 -100 °C. Nafion membranes are the most commonly used polymer electrolytes in PEMFC application as it has excellent chemical, mechanical and electrochemical properties as well as high proton conductivity at ambient temperature and high humidity condition. This waterbased electrolyte needs to be kept in a hydrated condition for the best performance and a maximum conductivity of 0.083 S/cm at 100% relative humidity (RH) [2].

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Nafion/Pd–SiO2 nanofiber composite membranes for direct methanol fuel cell applications

Cited by 99 publications

References 49 publications

Novel sulfonated Nafion®-based composite membranes with pillararene as selective artificial proton channels for application in direct methanol fuel cells

Novel sulfonated Nafion®-based composite membranes with pillararene as selective artificial proton channels for application in direct methanol fuel cells

Synthesis and Characterisation of Chitosan-Cellulose Biocomposite Membrane for Fuel Cell Applications

Thermal Properties and Conductivity of Nafion-Zirconia Composite Membrane

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