Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 47, Issue 30, Pages 14141-14157Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2022.02.1370360-3199
Keywords
Fuel cell; Dibenzo-18-crown-6; SBA-NH2; Anion exchange membrane; Conductivity
Categories
Funding
- Liaoning Provincial Natural Science Foundation Guidance Program Project [20180550695]
- Department of Education of Liaoning Province-other projects [2018CYY003]
- General Project of Liaoning Education Depart-ment [L2017LFW006]
- Liaoning Province Innovation Talent Support Program [LR2019038]
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In this study, a self-made diformyl-dibenzo-18-crown-6 ether (DDB18C6) was grafted into mesoporous molecular sieve (SBA-NH2) to synthesize a modified molecular sieve (SBA-C), which was then used to fabricate an anion exchange membrane for fuel cell applications. The synthesized membrane demonstrated improved OH- transportation efficiency due to its unique internal structure. The P-(SBA(10%)-C) membrane exhibited the highest ionic conductivity (0.107 S.cm(-1)) and power density (354.8 mW cm(-2)) at 80 ?. Additionally, the P-(SBA(10%)-C) membrane showed only a 2% decrease in conductivity after immersion in 6 mol L-1 KOH solution for 168 h, indicating its higher conductivity, good single cell performance, and alkali stability.
In this paper, self-made diformyl-dibenzo-18-crown-6 ether (DDB18C6) is in-situ grafted into the pores of mesoporous molecular sieve (SBA-NH2), and then the aforementioned modified molecular sieve (SBA-C) is introduced into the polyvinyl alcohol solution, and then the glutaraldehyde as the crosslinking agent to synthesized the anion exchange membrane under for fuel cell application. During the experiment, a series of anion exchange membranes (P-(SBA(x%)-C), x is the mass fraction of SBA-NH2) is developed and the pore channels and chemical structures of the aforementioned membrane is verified by FT-IR, SAXD, N-2 adsorption-desorption, H-1 NMR and XPS. Moreover, the performance of the membrane synthesized in this paper is also investigated and the results revealed that the unique membrane internal structure can improve the OH- transportation efficiency. Furthermore, the ionic conductivity of P-(SBA(10%)-C) membrane is the highest (0.107S.cm(-1)) and the power density is the highest (354.8 mW cm(-2)) at 80 ?. By immersing P-(SBA(10%)-C) membrane in 6 mol L-1 KOH solution for 168 h, the conductivity at 80 ?& nbsp;only decreased by 2%, proving that P-(SBA(10%)-C) has a higher conductivity, good single cell performance and alkali stability. (C)& nbsp;2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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