High temperature polymer electrolyte membrane fuel cells with Polybenzimidazole-Ce0.9Gd0.1P2O7 and polybenzimidazole-Ce0.9Gd0.1P2O7-graphite oxide composite electrolytes

Singh, Bhupendra; Devi, Nitika; Srivastava, Avanish Kumar; Singh, Rajesh Kumar; Song, Sun-Ju; Krishnan, N. Nambi; Konovalova, Anastasiia; Henkensmeier, Dirk

doi:10.1016/j.jpowsour.2018.08.076

Cited by 17 publications

(9 citation statements)

References 58 publications

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“…The PPD of the PA/PBI/SiO 2 membrane cell increased from 215 mW cm -2 to 284 mW cm -2 from 200°C to 240°C, and the cell shows a good stability under test conditions of 0.6 V at 240°C for 100 h [108]. This is very different from the report that the PPD of a PEMFC based on PA/PBI/Ce 0.9 Gd 0.1 P 2 O 7 membrane decreased from 307 mW cm -2 to 125 mW cm -2 when the operating temperature of the cell increased from 160 to 250°C [109]. This shows that the thermal stability of the proton carrier plays an important role in the power output of PEMFCs at elevated temperatures.…”

Section: Pbi/phosphosilicate Composite Membranescontrasting

confidence: 73%

Advancement toward Polymer Electrolyte Membrane Fuel Cells at Elevated Temperatures

Zhang

Aili

et al. 2020

Research

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Elevation of operational temperatures of polymer electrolyte membrane fuel cells (PEMFCs) has been demonstrated with phosphoric acid-doped polybenzimidazole (PA/PBI) membranes. The technical perspective of the technology is simplified construction and operation with possible integration with, e.g., methanol reformers. Toward this target, significant efforts have been made to develop acid-base polymer membranes, inorganic proton conductors, and organic-inorganic composite materials. This report is devoted to updating the recent progress of the development particularly of acid-doped PBI, phosphate-based solid inorganic proton conductors, and their composite electrolytes. Long-term stability of PBI membranes has been well documented, however, at typical temperatures of 160°C. Inorganic proton-conducting materials, e.g., alkali metal dihydrogen phosphates, heteropolyacids, tetravalent metal pyrophosphates, and phosphosilicates, exhibit significant proton conductivity at temperatures of up to 300°C but have so far found limited applications in the form of thin films. Composite membranes of PBI and phosphates, particularly in situ formed phosphosilicates in the polymer matrix, showed exceptionally stable conductivity at temperatures well above 200°C. Fuel cell tests at up to 260°C are reported operational with good tolerance of up to 16% CO in hydrogen, fast kinetics for direct methanol oxidation, and feasibility of nonprecious metal catalysts. The prospect and future exploration of new proton conductors based on phosphate immobilization and fuel cell technologies at temperatures above 200°C are discussed.

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Section: Pbi/phosphosilicate Composite Membranescontrasting

confidence: 73%

Advancement toward Polymer Electrolyte Membrane Fuel Cells at Elevated Temperatures

Zhang

Aili

et al. 2020

Research

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“…Isocyanate-modified GO (I-GO) was also employed for facilitated dispersibility in water and organic media, whereas the obvious degradation of carboxylic acid and epoxy oxygen groups restricted its application over 140 °C . Pyrophosphate Ce 0.9 Gd 0.1 P 2 O 7 combined with GO coordinated with water and PA molecules through O–H and P=O groups, which induced a positive influence on retention capacity and realized a proton conductivity of 199 mS·cm –1 at 180 °C and 5% RH . Except for GO-based carbon materials, the incorporation of multiwall CNTs not only facilitated better PA absorption and proton conductivity but also promoted the uniform spread of heat to prevent the formation of hot spots, which is critical for material stability at elevated working temperature.…”

Section: Elevated Temperature Polymer Electrolyte Membrane Electrolys...mentioning

confidence: 99%

Water Electrolysis toward Elevated Temperature: Advances, Challenges and Frontiers

et al. 2023

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Since severe global warming and related climate issues have been caused by the extensive utilization of fossil fuels, the vigorous development of renewable resources is needed, and transformation into stable chemical energy is required to overcome the detriment of their fluctuations as energy sources. As an environmentally friendly and efficient energy carrier, hydrogen can be employed in various industries and produced directly by renewable energy (called green hydrogen). Nevertheless, large-scale green hydrogen production by water electrolysis is prohibited by its uncompetitive cost caused by a high specific energy demand and electricity expenses, which can be overcome by enhancing the corresponding thermodynamics and kinetics at elevated working temperatures. In the present review, the effects of temperature variation are primarily introduced from the perspective of electrolysis cells. Following an increasing order of working temperature, multidimensional evaluations considering materials and structures, performance, degradation mechanisms and mitigation strategies as well as electrolysis in stacks and systems are presented based on elevated temperature alkaline electrolysis cells and polymer electrolyte membrane electrolysis cells (ET-AECs and ET-PEMECs), elevated temperature ionic conductors (ET-ICs), protonic ceramic electrolysis cells (PCECs) and solid oxide electrolysis cells (SOECs).

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“…This is the best performance obtained among the state-of-the-art fuel cells capable of operating at 200-300 °C , as shown in Fig. 1e and the Extended Data Table . 1 2,[13][14][15][16][29][30][31][32][33][34][35][36][37][38][39] .…”

Section: Working Principle Of Pa-doped San-cehp-pbimentioning

confidence: 99%

Self-assembled network polymer electrolyte membranes for application in fuel cells at 250℃

Lee¹,

Jo²,

Hwang³

et al. 2021

Preprint

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Modern H2-based energy storage and conversion devices require a polymer electrolyte membrane (PEM) fuel cell–based integrated power system with synergistic heat integration. The key issue in integrated power systems is developing a PEM that can operate at 200–300 °C. However, currently used phosphoric-acid-based high-temperature PEM fuel cells limited stability at higher operating temperatures. Herein, we introduce a cerium hydrogen phosphate (CeHP) PEM that conducts protons above 200 °C through a self-assembled network (SAN). The SAN-CeHP-PBI reached maximum power densities of 2.4 W cm-2 and operate stably for over 7000 minute without any voltage decay at 250 ℃ under H2/O2 and anhydrous conditions. The developed fuel cell can be combined with an external hydrogen generator that uses a liquid hydrogen carrier such as N-ethylcarbazole and methanol as fuel, thus achieving a high energy efficiency. The thermal stability and fuel flexibility of these SAN-CeHP-PBI demonstrate potential for commercial applications.

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High temperature polymer electrolyte membrane fuel cells with Polybenzimidazole-Ce0.9Gd0.1P2O7 and polybenzimidazole-Ce0.9Gd0.1P2O7-graphite oxide composite electrolytes

Cited by 17 publications

References 58 publications

Advancement toward Polymer Electrolyte Membrane Fuel Cells at Elevated Temperatures

Advancement toward Polymer Electrolyte Membrane Fuel Cells at Elevated Temperatures

Water Electrolysis toward Elevated Temperature: Advances, Challenges and Frontiers

Self-assembled network polymer electrolyte membranes for application in fuel cells at 250℃

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