Studies of performance degradation of a high temperature PEMFC based on H3PO4-doped PBI

Liu, Gang; Zhang, Huamin; Hu, Jingwei; Zhai, Yunfeng; Xu, Dongyan; Shao, Zhigang

doi:10.1016/j.jpowsour.2006.07.008

Cited by 144 publications

(74 citation statements)

References 17 publications

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“…With increasing number of cycles however the thickness decreased, being lower than the value of the reference MEA (38 ± 2 µm for MEA 2 and 34 ± 2 µm for MEA 3), as seen before for PBI membrane after a life test [27]. …”

Section: Eissupporting

confidence: 60%

The influence of impurities in high temperature polymer electrolyte membrane fuel cells performance

Boaventura

Alves

Ribeirinha

et al. 2016

International Journal of Hydrogen Energy

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This work investigates the influence of carbon dioxide and non-reacted methanol, present in the reformate stream obtained via methanol steam reforming, in the performance of high temperature polymer electrolyte membrane fuel cells (HT-PEMFC), operating between 160 °C and 180 °C.The HT-PEMFC anode was fed with pure hydrogen, hydrogen balanced with carbon dioxide (75 % / 25 % vol.) and synthetic reformate mixture, considering also vaporized methanol solution in the reformate content (up to 10 % vol.). The synthetic reformate was feed during cycles of 420 min. The fuel cell was characterized based on the polarization curve and electrochemical impedance spectroscopy (EIS) analysis. Additionally, acid-base titrations were performed to access the phosphoric acid content in different sections of the MEAs as well as scanning electron microscopy (SEM).A low impact in the fuel cell performance was observed when three cycles of synthetic reformate containing methanol solution were performed. When the number of cycles was increased, the performance of HT-PEMFC decreases and irreversible degradation of performance was observed. The cycles with synthetic reformate increased the ohmic resistance and high frequency resistance associated with anodic processes, but decreased the intermediate frequency resistance associated with cathodic processes. Additionally, by increasing the number of cycles, the phosphoric acid content of Celtec ® MEAs and the thickness of the membrane decreased. Keywords:Polymer electrolyte membrane fuel cell Polybenzimidazole Reformate gas Methanol Impurities effectElectrochemical impedance spectroscopy

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Section: Eissupporting

confidence: 60%

The influence of impurities in high temperature polymer electrolyte membrane fuel cells performance

Boaventura

Alves

Ribeirinha

et al. 2016

International Journal of Hydrogen Energy

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“…Shao et al [37] reviewed the material challenges facing HT-PEMFC. The main problems reported in the literature are the loss in the catalyst active area due to catalyst agglomeration, and phosphoric acid leaching out from the cell [37,119,120]. It is the opinion of Yu et al [121] and Wannek et al [122] that the main source of performance loss is due to catalyst agglomeration.…”

Section: Degradationmentioning

confidence: 99%

“…Other lifetime related studies are reported in the literature; Cheng et al [125] studied hydrogen crossover in HT-PEMFCs, and degradation in the PBI-membrane has been reported due to hydrogen peroxide formation [120]. Moçotéguy et al [123] studied the effect of using reformate fuel reporting a loss of 70e90% of the anode catalyst surface area due to the presence of CO.…”

Section: Degradationmentioning

confidence: 99%

High temperature (HT) polymer electrolyte membrane fuel cells (PEMFC) – A review

Chandan

Hattenberger

El-Kharouf

et al. 2013

Journal of Power Sources

785

428

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One possible solution of combating issues posed by climate change is the use of the High Temperature (HT) Polymer Electrolyte Membrane (PEM) Fuel Cell (FC) in some applications. The typical HT-PEMFC operating temperatures are in the range of 100e200 o C which allows for co-generation of heat and power, high tolerance to fuel impurities and simpler system design. This paper reviews the current literature concerning the HT-PEMFC, ranging from cell materials to stack and stack testing. Only acid doped PBI membranes meet the US DOE (Department of Energy) targets for high temperature membranes operating under no humidification on both anode and cathode sides (barring the durability). This eliminates the stringent requirement for humidity however, they have many potential drawbacks including increased degradation, leaching of acid and incompatibility with current state-of-the-art fuel cell materials. In this type of fuel cell, the choice of membrane material determines the other fuel cell component material composition, for example when using an acid doped system, the flow field plate material must be carefully selected to take into account the advanced degradation. Novel research is required in all aspects of the fuel cell components in order to ensure that they meet stringent durability requirements for mobile applications.

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“…The use of phosphoric acid doped membranes to combat dehydration issues results in a highly acidic environment that can increase component degradation [2]. Several authors have noted a rapid degradation of cell performance for PBI-based HT-PEMFCs [21][22][23][24][25]. Two key processes related to this rapid degradation have been identified: catalyst agglomeration in the cathode due the presence of phosphoric acid and oxygen coupled with the high potential, and the direct degradation of the polymer.…”

Section: Introductionmentioning

confidence: 99%

Application of a Coated Film Catalyst Layer Model to a High Temperature Polymer Electrolyte Membrane Fuel Cell with Low Catalyst Loading Produced by Reactive Spray Deposition Technology

et al. 2015

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Abstract:In this study, a semi-empirical model is presented that correlates to previously obtained experimental overpotential data for a high temperature polymer electrolyte membrane fuel cell (HT-PEMFC). The goal is to reinforce the understanding of the performance of the cell from a modeling perspective. The HT-PEMFC membrane electrode assemblies (MEAs) were constructed utilizing an 85 wt. % phosphoric acid doped Advent TPS ® membranes for the electrolyte and gas diffusion electrodes (GDEs) manufactured byReactive Spray Deposition Technology (RSDT). MEAs with varying ratios of PTFE binder to carbon support material (I/C ratio) were manufactured and their performance at various operating temperatures was recorded. The semi-empirical model derivation was based on the coated film catalyst layer approach and was calibrated to the experimental data by a least squares method. The behavior of important physical parameters as a function of I/C ratio and operating temperature were explored. OPEN ACCESSCatalysts 2015, 5 1674

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Studies of performance degradation of a high temperature PEMFC based on H3PO4-doped PBI

Cited by 144 publications

References 17 publications

The influence of impurities in high temperature polymer electrolyte membrane fuel cells performance

The influence of impurities in high temperature polymer electrolyte membrane fuel cells performance

High temperature (HT) polymer electrolyte membrane fuel cells (PEMFC) – A review

Application of a Coated Film Catalyst Layer Model to a High Temperature Polymer Electrolyte Membrane Fuel Cell with Low Catalyst Loading Produced by Reactive Spray Deposition Technology

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