文档介绍：Proton-Conducting Properties of a Br?nsted Acid -Base Ionic Liquid and Ionic Melts Consisting of Bis(trifluoromethanesulfonyl)imide and Benzimidazole for Fuel Cell Electrolytes Hirofumi Nakamoto, ?Akihiro Noda, ?Kikuko Hayamizu, ?Satoshi Hayashi, § Hiro-o Hamaguchi, §and Masayoshi Watanabe* ,? Department of Chemistry and Biotechnology, Yokohama National Uni Versity 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan, National Institute of Ad Vanced Industrial Science and Technology, AIST Tsukuba Centre 2, Tsukuba 305-8568, Japan, and Department of Chemistry, The Uni Versity of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan Recei Ved: September 19, 2006; In Final Form: No Vember 15, 2006 A novel protic ionic liquid and ionic melts consisting of a Br?nsted acid and base were prepared with bination of bis(trifluoromethanesulfonyl)imide (HTFSI) and benzimidazole (BIm) at various molar ratios. The thermal properties, ionic conductivities, 1H-NMR chemical shifts, Raman spectra, 1H and 19F self-diffusion coefficients, and electrochemical polarization curves were explored. A mixture at the equivalent molar ratio formed a protic neutral salt, and its thermal stability was higher than 350 °C. The phase diagram of the BIm -HTFSI binary mixtures revealed that plexes other than the neutral salt were found at [BIm]/[HTFSI] )2/1 and 6/1. In these BIm positions, fast proton exchange re