کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7738492 | 1497984 | 2014 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of through-plane distribution of polytetrafluoroethylene in carbon paper on in-plane gas permeability
ترجمه فارسی عنوان
اثر توزیع فضایی پلیتترافلوئورو اتیلن در کاغذ کربن بر نفوذپذیری گاز در هواپیما
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کلمات کلیدی
سلول سوختی غشای تبادل پروتون، حمایت از انتشار گاز، پلی اتیل فلوئورو اتیلن، نفوذپذیری در هواپیما،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
چکیده انگلیسی
In-plane permeability of gas diffusion backing (GDB) of proton exchange membrane fuel cells (PEMFCs) was investigated experimentally. Toray-paper and SGL-paper were selected as GDB test samples. Several Toray-papers were treated in-house with polytetrafluoroethylene (PTFE) using the immersion technique, dried either under atmospheric or vacuum pressure, and then sintered. The dependence of PTFE distribution in the through-plane direction on the PTFE drying conditions was examined using scanning electron microscopy (SEM)-based energy dispersive X-ray spectroscopy (EDS) imaging. The EDS image maps revealed that the PTFE distribution strongly depended on the drying condition, and PTFE drying under vacuum pressure yielded a relatively uniform PTFE distribution. The measured in-plane permeability suggests that the homogeneous distribution of PTFE achieved by the vacuum drying produces a porosity-leveling effect. In addition, the relationship between the in-plane permeability and porosity of the Toray-paper samples followed the Kozeny-Carman relation, whereas due to non-fibrous solids such as binder, that of the SGL-paper samples did not.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 248, 15 February 2014, Pages 822-830
Journal: Journal of Power Sources - Volume 248, 15 February 2014, Pages 822-830
نویسندگان
Hiroshi Ito, Katsuya Abe, Masayoshi Ishida, Akihiro Nakano, Tetsuhiko Maeda, Tetsuo Munakata, Hironori Nakajima, Tatsumi Kitahara,