期刊
JOURNAL OF MEMBRANE SCIENCE
卷 548, 期 -, 页码 223-231出版社
ELSEVIER
DOI: 10.1016/j.memsci.2017.11.025
关键词
Charge-transfer complex; Blend membrane; Polymer electrolyte membrane; Fuel cell
资金
- JSPS Japan [26410223]
- Center of Innovation Science and Technology based Radical Innovation and Entrepreneurship Program (COI Program), JST Japan
- Nissan Chemical Industries, Ltd.
- Grants-in-Aid for Scientific Research [26410223] Funding Source: KAKEN
We have prepared new charge-transfer (CT) complex polymer blend membranes (CT membranes), for use as high performance polymer electrolyte membranes (PEMs); with a simple and easy preparation method for application in PEFCs. In this study, electron-accepting sulfonated polyimide (SPI) and electron-donating polyether (PE), were used to develop polymer-polymer type CT membranes. The formation of CT complex in the obtained SPI/PE membranes was confirmed by visible spectroscopy. The use of flexible spacers in the PE and heat treatment of the CT membranes, enhanced the CT complex formation. SPI/PE CT membranes showed 1.9-2.2 times higher mechanical strength than the original SPI, while SPI/PE 0.33 CT membrane with heat treatment at 130 degrees C for 2 h showed 4.3 times higher mechanical strength than the original SPI. Hydrogen permeability through SPI/PE CT membranes was 4.1-5.4 times lower than Nafion 212 and 1.4-1.9 times lower than the original SPI membrane. We have prepared a thin SPI/PE CT membrane (10 mu m thickness), that showed comparable OCV (0.88 V), similar resistance compared to Nafion 212 and demonstrated more than 10 h of durability in a fuel cell test; suggesting that SPI/PE thin CT membrane can be applied for PEFC application.
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