Synthesis and characterization of anhydrous conducting polyimide/ionic liquid complex membranes via a new route for high-temperature fuel cells
     
Yazarlar (5)
Hüseyin Deligöz Istanbul Üniversitesi, Türkiye
Doç. Dr. Mesut YILMAZOĞLU Istanbul Üniversitesi, Türkiye
Serpil Yilmaztürk Istanbul Üniversitesi, Türkiye
Yavuz Şahin Istanbul Üniversitesi, Türkiye
Kemal Ulutaş Istanbul Üniversitesi, Türkiye
Makale Türü Özgün Makale (SSCI, AHCI, SCI, SCI-Exp dergilerinde yayınlanan tam makale)
Dergi Adı Polymers for Advanced Technologies (Q1)
Dergi ISSN 1042-7147 Wos Dergi Scopus Dergi
Dergi Tarandığı Indeksler SCI-Expanded
Makale Dili İngilizce Basım Tarihi 08-2012
Cilt / Sayı / Sayfa 23 / 8 / 1156–1165 DOI 10.1002/pat.2016
Makale Linki http://dx.doi.org/10.1002/pat.2016
Özet
The paper deals with the synthesis and characterization of a new series of anhydrous conducting acid-doped complex membranes based on polyimide (PI) and ionic liquid (IL) for high-temperature fuel cells via a new route. For this purpose, three imidazolium-based ILs (RIm +BF 4 -) with different alkyl chain lengths (R=methyl, ethyl, and butyl) are added into polyamic acid (PAA) intermediate prepared from the reaction of benzophenonetetracarboxylic dianhydride and diaminodiphenylsulfone in different -COOH/imidazolium molar ratios (n=0.5, 1, and 2). Then, the thermally imidized complex membrane was doped with H 2SO 4. The conductivities of acid-doped PI/IL complex membranes prepared by taking n of 1 are found to be in the range of 10 -4-10 -5Scm -1 at 180°C, whereas the acid-free PI/IL complex membranes show the conductivity at around 10 -9-10 -10Scm -1. Thermogravimetric analysis results reveal that the acid-doped PI/IL complex membranes are thermally stable up to 250°C. Dynamic mechanical analysis results of the acid-doped ionically interacted complex membrane show that the mechanical strengths of the PI/IL complex membranes including 1-methyl imidazolium tetrafluoroborate (MeIm-BF 4) and 1-ethyl 3-methyl imidazolium tetrafluoroborate (EtIm-BF 4) are comparable with those of pristine PI until 200°C. Furthermore, it can be clearly emphasized that the ionic interaction between carboxylic acid groups of PAA's and IL's cations offers a positive role in long-term conductivity stability by preventing the IL migration at high temperatures. On the other hand, preliminary methanol permeability tests of the acid-doped membranes show that they can also be considered as an alternative for direct methanol fuel cells. © 2011 John Wiley & Sons, Ltd.
Anahtar Kelimeler
anhydrous conducting membrane | conductivity | fuel cell | ionic liquid | polyimide
BM Sürdürülebilir Kalkınma Amaçları
Atıf Sayıları
WoS 21
SCOPUS 21
Google Scholar 25
Synthesis and characterization of anhydrous conducting polyimide/ionic liquid complex membranes via a new route for high-temperature fuel cells

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