Mahreni, Mahreni and MOHAMAD, Abu Bakar and KADHUM, Abdul Amir Hasan. and Daud, Wan Ramli Wan (2010) NANOCOMPOSITE ELECTROLYTE MEMBRANE FOR MODERATE TEMPERATURE AND LOW RELATIVE HUMIDITY HYDROGEN PROTON EXCHANGE MEMBRANE FUEL CELL (HPEMFC) APPLICATION. In: The 8th International Conference on Membrane Science and Technology ITB Bandung, Indonesia | 29th Nov - 1st Dec 201, ITB Bandung.
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Abstract
Nowadays PEMFC with hydrogen fuel has developed to commercialize to replace the conventional
machine. Several limitations in PEMFC commercialization are its low efficiency, viability of
hydrogen fuel supply and problem of controlling fuel and water as reaction products. Effective effort
to increase efficiency and water management include elevating temperature of PEMFC operation near
water boiling point to increase energy produced, prevent water flooding, enhanced cooling efficiency
and also the possibility to use hydrogen and air under lower humidity in order to make simples
PEMFC design. But at elevated temperature and low relative humidity, Nafion membrane that during
the time still used as electrolyte will shrink and at high humidity and high temperature above 80oC
membrane will swell and irreversibility decay occur. Membrane shrinking and swelling will reduce
PEMFC performance. The objective of this study is to investigate the usage of Nafion-SiO2-PWA
nanocomposite membrane NS10W, NS15W and NS20W with the ratio of Nafion:SiO2-PWA =
(1:0.0288:0.0154), (1:0.0432:0.0173) and (1:0.05768:0.023) respectively as PEMFC electrolyte to
improve PEMFC performance at moderate temperature and low relative humidity. The Fuel cell test
(FCT) station (FCT-2000 ElectroChem, USA) was used for the cell polarization test and
determination of the internal resistance of the membrane. The gas flow of H2/O2 was fixed at the
stoichiometric (H2 + ½ O2 ↔ H2O) mole ratio 0.5/0.38 while the hydrogen and oxygen pressures were
fixed at 1 atm. The operating temperature of the cell was varied between 30–900C. The relative
humidity (RH) was controlled by using the water temperature of the H2 and O2 gas humidifiers.
During the (V-I) measurement, the testing system was stabilized for about 1 h in order to obtain
constant value for all the parameters of interest and the resistance of the membranes was measured by
optimizing the (V-I) experiments. The electrochemical performance of the composite membrane with
dry and humidified reactants are compared with those of the native Nafion membrane to identify the
operating condition with low relative humidity condition. The results show that at temperature of 30-
90oC and 100% RH humidity, the Nafion membrane performance is higher compare to composite
membrane under same temperature value. But at 40% RH and same temperature, the composite
membrane performance is higher compared to Nafion membrane. The result of data analysis and
optimized polarization curve model shows that the mechanism of proton transfer in the Nafion
membrane followed the vehicular model, which is as in the composite membrane is close to the
proton hopping model. The performance of the Nafion-SiO2-PWA composite membrane is stable at
low relative humidity operating at 30-90oC temperature. Since the humidity is low and operating
temperature are high, the PEMFC using the nanocomposite membrane can run with lower humidity
and with higher power compared to a PEMFC using the pure Nafion membrane.
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Subjek: | T Technology > TP Chemical technology |
| Divisions: | x. Faculty of Engineering, Science and Mathematics > School of Chemistry |
| Depositing User: | Dr Mahreni Mahreni |
| Date Deposited: | 23 Apr 2019 02:35 |
| Last Modified: | 23 Apr 2019 02:35 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/19410 |
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