Interface Influence on the Proton-Conductivity of Ordered Mesoporous Silica Membranes

2007 ◽  
Vol 124-126 ◽  
pp. 623-626
Author(s):  
Liang Ming Xiong ◽  
Masayuki Nogami

As an alternative to a solid-state electrolyte for proton exchange membrane fuel cells (PEMFCs), ordered mesoporous membranes (OMMs) were prepared using a sol-gel technique, followed by a deep-UV irradiation. Structure and impedance spectroscopy analyses revealed that the porous architecture and proton conductivity of OMMs were influenced by the nature of the substrates. Compared with hydrophilic substrate, hydrophobic substrate was beneficial to an accessible porous architecture in the interface layer and an increase of proton conductivity of the whole membrane. The proton conductivity of the OMMs was up to 10-3 S cm-1.

2016 ◽  
Vol 1 (1) ◽  
pp. 14
Author(s):  
Siti Wafiroh ◽  
Suyanto Suyanto ◽  
Yuliana Yuliana

AbstrakDi era globalisasi ini, kebutuhan bahan bakar fosil semakin meningkat dan ketersediannya semakin menipis. Oleh karena itu, dibutuhkan bahan bakar alternatif seperti Proton Exchange Membrane Fuel Cell (PEMFC). Tujuan dari penelitian ini adalah membuat dan mengkarakterisasi membran komposit kitosan-sodium alginat dari rumput laut coklat (Sargassum sp.) terfosforilasi sebagai Proton Exchange Membrane Fuel Cell (PEMFC). PEM dibuat dengan 4 variasi perbandingan konsentrasi antara kitosan dengan sodium alginat 8:0, 8:1, 8:2, dan 8:4 (b/b). Membran komposit kitosan-sodium alginat difosforilasi dengan STPP 2N. Karakterisasi PEM meliputi: uji tarik, swelling air, kapasitas penukar ion, FTIR, SEM, permeabilitas metanol, dan konduktivitas proton. Berdasarkan hasil analisis tersebut, membran yang optimal adalah perbandingan 8:1 (b/b) dengan nilai modulus young sebesar 0,0901 kN/cm2, swelling air sebesar 19,14 %, permeabilitas metanol sebesar 72,7 x 10-7, dan konduktivitas proton sebesar 4,7 x 10-5 S/cm. Membran komposit kitosan-sodium alginat terfosforilasi memiliki kemampuan yang cukup baik untuk bisa diaplikasikan sebagai membran polimer elektrolit dalam PEMFC. Kata kunci: kitosan, sodium alginat, terfosforilasi, PEMFC  AbstractIn this globalization era, the needs of fossil fuel certainly increases, but its providence decreases. Therefore, we need alternative fuels such as Proton Exchange Membrane Fuel Cell (PEMFC). The purpose of this study is preparationand characterization of phosphorylated chitosan-sodium alginate composite membrane from brown seaweed (Sargassum sp.) as Proton Exchange Membrane Fuel Cell (PEMFC). PEM is produced with 4 variations of concentration ratio between chitosan and sodium alginate 8:0, 8:1, 8:2, and 8:4 (w/w). Chitosan-sodium alginate composite membrane phosphorylated with 2 N STPP. The characterization of PEM include: tensile test, water swelling, ion exchange capacity, FTIR, SEM, methanol permeability, and proton conductivity. Based on the analysis result, the optimal membrane is ratio of 8:1 (w/w) with the value of Young’s modulus about 0.0901 kN/cm2, water swelling at 19.14%, methanol permeability about 72.7 x 10-7, and proton conductivity about 4.7 x 10-5 S/cm. The phosphorylated chitosan-sodium alginate composite membrane has good potentials for the application of the polymer electrolyte membrane in PEMFC. Keywords: chitosan, sodium alginate, phosphorylated, PEMFC


2020 ◽  
Vol 31 (7) ◽  
pp. 1571-1580
Author(s):  
Xianlin Xu ◽  
Zhufeng Shao ◽  
Lei Shi ◽  
Bowen Cheng ◽  
Xuan Yin ◽  
...  

2013 ◽  
Vol 58 (1) ◽  
pp. 1277-1283
Author(s):  
N.-I. Kim ◽  
J. Seong ◽  
M.-J. Yang ◽  
S.-H. Cho ◽  
J.-Y. Park ◽  
...  

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