@inproceedings{a2a59e27ba2f49d6896c548c37dc78ae,
title = "Sulfonated polyimide membranes For polymer electrolyte fuel cells",
abstract = "Sulfonated polyimides (SPIs) bearing sulfophenoxy side groups were successfully prepared. Their uncross-linked and cross-linked membranes were evaluated as polymer electrolyte membranes for polymer electrolyte fuel cells (PEFCs). They maintained high mechanical strength and high proton conductivity after aging in water at 130 °C for 500 h, indicating their high water stability. PEFCs with the SPI membranes showed high performances at 90 °C and a high humidity (85 %RH) of supplied gases. They also showed fairly high performances even at a low humidity of 30%RH due to the back diffusion of water formed at the cathode. PEFCs with the cross-linked SPI membranes were operated under a constant current density of 0.5 A/cm2 at 90 °C and 85 %RH for 1600 h without any reduction in cell performance, indicating their high fuel cell durability. The SPI membranes have high potential for PEFCs at higher temperatures above 80 °C.",
author = "K. Okamoto and K. Matsuda and Z. Hu and K. Chen and N. Endo and M. Higa",
year = "2008",
doi = "10.1149/1.2921527",
language = "English",
isbn = "9781566776394",
series = "ECS Transactions",
publisher = "Electrochemical Society Inc.",
number = "1",
pages = "5--12",
booktitle = "ECS Transactions - Fuel Cell Seminar 2007",
address = "United States",
edition = "1",
note = "Fuel Cell Seminar 2007 ; Conference date: 15-10-2007 Through 19-10-2007",
}