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Description:

Sulfonated polyphenylsulfone (SPPSU) with a high ion exchange capacity (IEC) was synthesized using commercially available PPSU, and a large-area (16  18 cm) CSPPSU membrane was prepared. In addition, we developed an activation process, in which the membrane was treated with alkaline and acidic solutions to remove sulfur dioxide (SO2), which forms as a byproduct during heat treatment. CSPPSU membranes obtained using this activation method had high thermal, mechanical and chemical stabilities. In I-ViR free studies for fuel cell evaluation, high performances, similar to those using Nafion, were obtained. In addition, from the hydrogen (H2) gas crossover characteristics, the durability is much better than that of a Nafion212 membrane. In the studies evaluating the long-term stabilities by using a constant current method, a stability of 4000 h was obtained for the first time. These results indicate that the CSPPSU membrane obtained by using our activation method is promising as a polymer electrolyte membrane.

Rights:

• Creative Commons BY Attribution 4.0 International
  Creative Commons BY Attribution 4.0 International

Keyword: PPSU, PEMFCs, CSPPSU, activation, High IEC

Date published: 2020-02-18

Publisher: MDPI AG

Journal:

• Membranes (ISSN: 20770375) vol. 10 issue. 2 p. 31-31

Funding:

Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.3390/membranes10020031

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Updated at: 2024-01-05 22:12:44 +0900

Published on MDR: 2023-03-03 11:10:50 +0900