کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8078211 1521478 2014 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
On the role of the silica-containing catalyst layer for proton exchange membrane fuel cells
ترجمه فارسی عنوان
بر روی نقش لایه کاتالیست حاوی سیلیکا برای سلول های سوختی غشای تبادل پروتون
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی (عمومی)
چکیده انگلیسی
The performance of a PEMFC (proton exchange membrane fuel cell) severely decreases as the relative humidity decreases. Herein, we present size-controlled SiO2 (silica) nanoparticles in the CLs (catalyst layers) to provide sufficient water to the Nafion ionomer. It is found that the microstructure of the agglomerated CL is notably improved using the SiO2 particles with smaller diameter. In addition, as the SiO2 particle diameter decreases, both the electrochemical surface area and ohmic performance are improved, as well as the wettability, for the PEMFC application. The highest performance is achieved for the CL with the 8 nm SiO2 particle, which results in 2.93 times increased current density at 0.5 V relative to the 80 nm SiO2-containing CL, when SiO2-to-carbon ratio was fixed to 0.20. Consequently, it is more effective to improve the electrode morphology of the SiO2 CL than simply increase the SiO2 content, in order to enhance the fuel-cell performance under low relative humidity.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy - Volume 68, 15 April 2014, Pages 794-800
نویسندگان
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