کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10141076 | 1646055 | 2018 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
High temperature polymer electrolyte membrane fuel cells with Polybenzimidazole-Ce0.9Gd0.1P2O7 and polybenzimidazole-Ce0.9Gd0.1P2O7-graphite oxide composite electrolytes
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In this work, polybenzimidazole based composite membranes are fabricated using polybenzimidazole, Ce0.9Gd0.1P2O7 and graphite oxide by solution casting procedure. The microstructural, mechanical and electrical properties of the phosphoric acid-doped composite membranes are characterized for fuel cell applications. Addition of graphite oxide in the composite leads to improvement in homogeneous dispersion of higher amount, 31â¯wt%, of Ce0.9Gd0.1P2O7. With the increasing amount of Ce0.9Gd0.1P2O7 in the composite membranes the amount of phosphoric acid loading decreases, but the proton conductivity of the composite membrane is higher than that is reported for the phosphoric acid-doped polybenzimidazole membranes. At 180â¯Â°C, a maximum conductivity of 182â¯mSâ¯cmâ1 for polybenzimidazole/Ce0.9Gd0.1P2O7 membrane with 24â¯wt% Ce0.9Gd0.1P2O7 and 199â¯mSâ¯cmâ1 for polybenzimidazole/Ce0.9Gd0.1P2O7/graphite oxide membrane with 31â¯wt% Ce0.9Gd0.1P2O7 is observed. The H2-Air fuel cells operating at 160â¯Â°C with â¼250â¯Î¼m thick polybenzimidazole/Ce0.9Gd0.1P2O7 electrolyte shows open circuit voltage of 0.938â¯V and maximum power density of 255â¯mWâ¯cmâ2 with 640â¯mAâ¯cmâ2 current at 160â¯Â°C whereas the corresponding values with â¼200â¯Î¼m thick polybenzimidazole/Ce0.9Gd0.1P2O7/graphite oxide membrane are 0.976â¯V and 307â¯mWâ¯cmâ2 with 800â¯mAâ¯cmâ2 current, respectively. However, irrespective of the increased conductivity at the higher temperatures, the maximum power density decreases with increasing temperature >160â¯Â°C.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 401, 15 October 2018, Pages 149-157
Journal: Journal of Power Sources - Volume 401, 15 October 2018, Pages 149-157
نویسندگان
Bhupendra Singh, Nitika Devi, Avanish Kumar Srivastava, Rajesh K. Singh, Sun-Ju Song, N. Nambi Krishnan, Anastasiia Konovalova, Dirk Henkensmeier,