Alkaline fuel cells running at elevated temperature for regenerative fuel cell system applications in spacecrafts

Markgraf, S.; Hörenz, M.; Schmiel, Tino; Jehle, Walter; Lucas, J.; Henn, Norbert

doi:10.1016/j.jpowsour.2011.10.118

Cited by 26 publications

(7 citation statements)

References 1 publication

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“…Before quaterization reactions, the CMPES membrane was reacted with sufficient amount of 1‐hexanamine (30%) to provide the long hydrophobic chain on CMPES (Figure ). By linking the hydrophobic alkyl amine chain on CMPES, the swelling ratio could be decreased remarkably, and it can also enhance the ionic conduction of the membrane . To complete the quaternization process, again, the membrane was immersed on 30% triethylamine solution for 48 h. In this step, the CMPES was converted to self‐aggregated quaternized polyether sulfone (S‐QPES) by the addition of ammonium group with long hydrophobic chain.…”

Section: Methodsmentioning

confidence: 99%

A novel quaternized poly(ether sulfone) membrane for alkaline fuel cell application

Koilpillai

Dharmalingam

2014

Int. J. Energy Res.

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Summary A new type of poly(ether sulfone)‐based self‐aggregated anion exchange membrane (AEM) was successfully synthesized and used in H2/O2 fuel cell applications. The self‐aggregated structural design improves the effective mobility of OH− ion and increases the ionic conductivity of AEM. Proton nuclear magnetic resonance and Fourier transform infrared spectroscopy spectra confirm successful chloromethylation and quaternization in the poly(ether sulfone). Thermogravimetric analysis curves show the self‐aggregated membrane was thermally stable up to 180 °C. The AEM also has excellent mechanical properties, with tensile strength 53.5 MPa and elongation at break 47.6% under wet condition at room temperature. The performance of H2/O2 single fuel cell at 30 °C showed the maximum power density of 162 mW cm−2. These results show that the self‐aggregated quaternized poly(ether sulfone) membrane is a potential candidate for alkaline fuel cell applications. Copyright © 2014 John Wiley & Sons, Ltd.

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Section: Methodsmentioning

confidence: 99%

A novel quaternized poly(ether sulfone) membrane for alkaline fuel cell application

Koilpillai

Dharmalingam

2014

Int. J. Energy Res.

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“…Space probes are expected to be lightweight, compact and self-sustainable and hence, URFC proves out to be the best choice under these circumstances. URFCs can harness solar energy to electrolyze water into hydrogen and oxygen, which is then used to generate power in the fuel cell mode and the obtained water is returned for use under electrolyzer mode thus, completing a sustainable energy cycle ( 16), (17). A PV-URPEMFC system, employing a battery bank for energy storage, has been demonstrated in figure 6.…”

Section: Integration Of An Electrolyzer With a Fuel Cellmentioning

confidence: 99%

Electrolyzers for Green Hydrogen Generation and their Integration with Fuel Cells

Meda¹,

Rajyaguru

Pandey³

et al. 2022

ECS Trans.

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Mankind is being alerted about the gravity of the imminent global cataclysmic event through various forms of messages from Mother Nature. Global stakeholders and government officials around the world are enforced to take up the daunting task to solve intricate issues such as global energy security, mitigating climate change, abating the release of greenhouse gas emissions, etc. Scientists are exploring avenues to tackle these major issues sustainably and in the greenest way possible. Green hydrogen is one such potential answer to all the global concerns. It can quench all the energy requirements for a plethora of applications without adversely impacting the environment. An attempt is made to elucidate the potentiality of green hydrogen generation using electrolyzers and their integration with fuel cells by the medium of this review.

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“…There is a renewed interest in utilizing hydrogen fuel cells to power space vehicles due to the energy advantages they can provide over other technologies, such as higher energy densities compared to batteries (1,2). In instances when solar power is not available, a fuel cell system designed to support extended high-power operations in space can have less mass and volume than an equivalent battery-based power plant (3). Additionally, a fuel cell system that is integrated with a bipropellant thruster system could require even less mass and volume by eliminating the need for the fuel cell system to have a dedicated fuel and oxidizer supply by capitalizing on the bipropellant stores that are already part of the thruster system.…”

Section: Introductionmentioning

confidence: 99%

Bipropellant Enabled Solid Oxide Fuel Cell Stack Power Supply: Energy Agility for Space Vehicles

Plumley¹,

Benavidez²,

Jemison³

et al. 2023

ECS Trans.

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A Solid Oxide Fuel Cell (SOFC) system capable of running on the same fuel and oxidizer as an onboard bipropellant thruster can create enhanced operational flexibility. If a spacecraft needs thrust, the bipropellant can be ignited to provide thrust. If a spacecraft needs electric power, the spacecraft can consume bipropellant to generate auxiliary power. In this work, the proven bipropellant pair ammonia (NH3) and nitrous oxide (N2O) are shown to be a viable fuel and oxidant for SOFCs, as in situ thermal NH3 cracking will generate H2 and N2O decomposition will generate O2. A 5 cell SOFC stack produced 89 W when fueled with NH3 and N2O. The results of this study demonstrate the potential for a bifunctional spacecraft system that can satisfy both operational power and on-orbit maneuverability requirements.

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Alkaline fuel cells running at elevated temperature for regenerative fuel cell system applications in spacecrafts

Cited by 26 publications

References 1 publication

A novel quaternized poly(ether sulfone) membrane for alkaline fuel cell application

A novel quaternized poly(ether sulfone) membrane for alkaline fuel cell application

Electrolyzers for Green Hydrogen Generation and their Integration with Fuel Cells

Bipropellant Enabled Solid Oxide Fuel Cell Stack Power Supply: Energy Agility for Space Vehicles

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