Liu, Zhixiang
(Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China)
,
Yang, Yang
(Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China)
,
Lü, Weizhong
(Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China)
,
Wang, Cheng
(Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China)
,
Chen, Meng
(College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, Heilongjiang 150001, China)
,
Mao, Zongqiang
(Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China)
AbstractSelf-humidifying proton exchange membrane fuel cell (PEMFC) has aroused quite many interests because this kind of fuel cell system is so simple that only air blower is needed to supply reacting and cooling air. Composite membrane with Pt particles embedded in perfluorosulfonate acid (Pt-PFSA...
AbstractSelf-humidifying proton exchange membrane fuel cell (PEMFC) has aroused quite many interests because this kind of fuel cell system is so simple that only air blower is needed to supply reacting and cooling air. Composite membrane with Pt particles embedded in perfluorosulfonate acid (Pt-PFSA) resin exhibits good self-humidifying fuel cell performance, while the inorganic Pt particles destroy the integrality of the organic PFSA membrane and the durability of this kind of membrane is questionable. In this paper, Pt-PFSA composite membrane was prepared and the durability of the membrane in mid-term fuel cell operation was tested and compared with PFSA membrane. Two single cells with 25 cm2 active area were assembled with Pt-PFSA membrane and PFSA membrane, and continuously operated at constant current density of 500 mA/cm2, 50 °C, with dry H2 and dry air for 1000 h. Polarization curves, cyclic voltammetry and AC impedance analysis were conducted during the durability test. The results reveal that the Pt-PFSA cell shows better stability in fuel cell performance than the PFSA cell, while the hydrogen crossover current density increases about 100 times, which indicates much faster corrosion speed of the Pt-PFSA membrane than the PFSA membrane during the mid-term continuous fuel cell operation. The experimental results illustrate that much more efforts are needed to be focused on the integrity and degradation prevention of the Pt-PFSA membrane, although it shows excellent mid-term self-humidifying performance. Highlights► Platinum particles embedded Perfluorosulfonate acid composite membrane (Pt-PFSA) was prepared and performances of fuel cell with Pt-PFSA and PFSA membranes were compared. ► Short-term performances of fuel cell with Pt-PFSA membrane were proved to be better than that with PFSA membrane in dry air and hydrogen operation. ► With 1000 h mid-term operation, experimental results showed quite higher hydrogen crossover current density of Pt-PFSA membrane than PFSA membrane, which revealed faster corrosion rate of Pt-PFSA membrane than PFSA membrane.
AbstractSelf-humidifying proton exchange membrane fuel cell (PEMFC) has aroused quite many interests because this kind of fuel cell system is so simple that only air blower is needed to supply reacting and cooling air. Composite membrane with Pt particles embedded in perfluorosulfonate acid (Pt-PFSA) resin exhibits good self-humidifying fuel cell performance, while the inorganic Pt particles destroy the integrality of the organic PFSA membrane and the durability of this kind of membrane is questionable. In this paper, Pt-PFSA composite membrane was prepared and the durability of the membrane in mid-term fuel cell operation was tested and compared with PFSA membrane. Two single cells with 25 cm2 active area were assembled with Pt-PFSA membrane and PFSA membrane, and continuously operated at constant current density of 500 mA/cm2, 50 °C, with dry H2 and dry air for 1000 h. Polarization curves, cyclic voltammetry and AC impedance analysis were conducted during the durability test. The results reveal that the Pt-PFSA cell shows better stability in fuel cell performance than the PFSA cell, while the hydrogen crossover current density increases about 100 times, which indicates much faster corrosion speed of the Pt-PFSA membrane than the PFSA membrane during the mid-term continuous fuel cell operation. The experimental results illustrate that much more efforts are needed to be focused on the integrity and degradation prevention of the Pt-PFSA membrane, although it shows excellent mid-term self-humidifying performance. Highlights► Platinum particles embedded Perfluorosulfonate acid composite membrane (Pt-PFSA) was prepared and performances of fuel cell with Pt-PFSA and PFSA membranes were compared. ► Short-term performances of fuel cell with Pt-PFSA membrane were proved to be better than that with PFSA membrane in dry air and hydrogen operation. ► With 1000 h mid-term operation, experimental results showed quite higher hydrogen crossover current density of Pt-PFSA membrane than PFSA membrane, which revealed faster corrosion rate of Pt-PFSA membrane than PFSA membrane.
Int J Hydrogen Energy Candusso 31 1019 2006 10.1016/j.ijhydene.2005.11.010 Characterisation and modelling of a 5 kW PEMFC for transportation applications
Chem Eng J Wang 112 87 2005 10.1016/j.cej.2005.07.002 Preparation and evaluation of a novel self-humidifying Pt/PFSA composite membrane for PEM fuel cell
J Power Sources Kwak 118 200 2003 10.1016/S0378-7753(03)00094-6 The effect of platinum loading in the self-humidifying polymer electrolyte membrane on water uptake
Int J Hydrogen Energy Amjadi 35 9252 2010 10.1016/j.ijhydene.2010.01.005 Investigation of physical properties and cell performance of Nafion/TiO2 nanocomposite membranes for high temperature PEM fuel cells
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