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Results for “MEMBRANES”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Modeling water diffusion in polybenzimidazole membranes using partial immobilization and free volume theory
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Membrane properties of trisulfonated hydrophilic and partially fluorinated hydrophobic multiblock copolymer
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Shale gas produced water management using membrane distillation: An optimization-based approach
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Multiblock Copolymer Anion-Exchange Membranes Derived from Vinyl Addition Polynorbornenes
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Correlating Stability and Performance of NaSICON Membranes for Aqueous Redox Flow Batteries
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One-Pot Synthesis of Proton Exchange Membranes from Anion Exchange Membrane Precursors
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The middle lipin domain adopts a membrane-binding dimeric protein fold
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Mesoscopic analyses of the impact of morphology and operating conditions on the transport resistances in a proton-exchange-membrane fuel-cell catalyst layer
Exploring the origins of local transport resistance and characterizing the oxygen transport resistances in the catalyst layer (RCL) are critical for cost reduction. In this paper, a comprehensive mesoscopic model for simulating coupled transport processes of oxygen and water vapor for different structural parameters under different operating conditions in reconstructed microstructures is proposed. The local transport resistance is calculated after achieving the limiting current density and the effective diffusivity of oxygen. The results demonstrate that RCL increases greatly with decreasing platinum loading (LPt) and the transport resistances in other components of the cell dominate for high-loadings. Both the reduced oxygen permeation coefficient in the ionomer thin-film and the adsorption resistance account for the origins of local transport resistance. The local transport resistance increases with the bare carbon ratio for a constant LPt and Pt/C ratio due to the decreased effective ionomer surface, and increases with the I/C ratio due to the increased ionomer thickness and decreased Knudsen diffusivity. Due to the presence of liquid water, a slight decrease followed by an increase of the local transport resistance versus relative humidity is obtained. The contribution of ionomer thin-films to RCL is more sensitive to liquid saturation compared with that of pores. This journal is
Clarification of mechanisms of protonic photovoltaic action initiated by photoexcitation of strong photoacids covalently bound to hydrated Nafion cation-exchange membranes wetted by aqueous electrolytes
Junctions formed from materials that contain mobile charged species and fixed counterions can assist in photo-induced charge separation and lead to photovoltaic action, irrespective of whether the mobile charges are electronic or protonic.
Janus magnetoelastic membrane swimmers
Design of magnetically driven micro-swimmer with feasibility in propelling through viscous fluids on desired trajectories.
Membrane Chaperoning of a Thylakoid Protease Whose Structural Stability Is Modified by the Protonmotive Force
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Chloroplast Chaperonin-Mediated Targeting of a Thylakoid Membrane Protein
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(Invited) Linking Ionomer/Electrocatalyst Interactions to Membrane Electrode Assembly Performance and Durability in Proton Exchange Membrane Fuel Cells
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