Ion and Water Transports in Double Gyroid Nanochannels Formed by Block Copolymer Anion Exchange Membranes

Batteries, Journal Year: 2025, Volume and Issue: 11(4), P. 126 - 126

Published: March 26, 2025

Mechanically improved polymeric membranes with high ionic conductivity (IC) and good permeability are highly desired for next-generation anion exchange (AEMs) in order to reduce Ohmic losses enhance water management alkaline membrane fuel cells. To move towards the fabrication of such high-performance membranes, creation hydrophilic ion-conducting double gyroid (DG) nanochannels within block copolymer (BCP) AEMs is a promising approach. However, this attractive solution remains difficult implement due complexity constructing well-developed DG morphology across entire thickness. deal issue, permeable polystyrene-block-poly(2-vinylpyridine)-block-poly(ethylene oxide) were produced by combining solvent vapor annealing (SVA) treatment methylation process. Here, SVA enabled manufacture DG-forming BCP while process allowed conversion pyridine sites N-methylpyridinium (NMP+) cations via Menshutkin reaction. Following SVA-methylation method, IC value water-permeable (~384 L h−1 m−2 bar−1) DG-structured their OH−counter form was measured be ~2.8 mS.cm−1 at 20 °C lower probed, under same experimental conditions, from as-cast NMP+-containing analogs non-permeable disordered phase (~1.2 mS.cm−1).

Language: Английский

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Thermally Cured Sulfonated para‐PBI as Ion Solvating Membrane for Use in Water Electrolysis

Advanced Energy Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 1, 2025

Abstract A sulfonated para ‐polybenzimidazole (MS‐PBI) membrane is thermally cured at 350 °C for 120 minutes. The thus obtained cMS‐PBI insoluble in hot phosphoric acid solution (<5% soluble fraction), and free of the known breaking points under alkaline conditions, i.e., no aromatic ether bonds, quaternary ammonium groups, N ‐alkylated neutral or positively charged imidazole groups. Indeed, a 6 months long stability test 2 M KOH 80 shows that retains its dimensions weight without any sign degradation. room temperature conductivity increases within first 24 days, then remains constant 192 ± 10 mS cm −1 . At °C, 3 reaches 682 with feed solution, an electrolyzer using robust nickel foam electrodes has performance 0.975 −2 V. With NiFe/Raney nickel, 3.52 (extrapolated) V are reached. Voltage remained stable 200 hours test. In conclusion, it expected ion solvating membranes like can substitute anion exchange water electrolyzers, by this improve their lifetime reduce cost green hydrogen.

Language: Английский

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Supercharged ion exchange membranes via short-chain crosslinkers

Nature Chemical Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: April 11, 2025

Language: Английский

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Performance-Limiting Factors of Hydrocarbon Ionomeric Binders for Fuel Cells and Electrolyzers

ACS Energy Letters, Journal Year: 2025, Volume and Issue: unknown, P. 2392 - 2399

Published: April 18, 2025

Language: Английский

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Microporous poly(aryl piperidinium) hydroxide exchange membranes with multi-directional branched structure for high performance fuel cells

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: unknown, P. 137676 - 137676

Published: April 1, 2025

Language: Английский

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