کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4907638 | 1426574 | 2017 | 22 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A model for impedance of a PEM fuel cell cathode with poor electron conductivity
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: A model for impedance of a PEM fuel cell cathode with poor electron conductivity A model for impedance of a PEM fuel cell cathode with poor electron conductivity](/preview/png/4907638.png)
چکیده انگلیسی
A model for impedance of the cathode catalyst layer (CCL) with poor electronic conductivity Ïe is developed. In the case of small cell current, an analytical expression for the CCL impedance is derived. At small currents, finite Ïe increases the static cell resistivity by the value 1/(3Ïe). In addition, the CCL exhibits a pure ohmic resistivity, which is equivalent to proton and electronic resistivities connected in parallel. Finite Ïe distorts the shape of the Nyquist spectrum in the HF domain; the CCL proton conductivity Ïp can no longer be determined simply as a projection of the straight HF line onto the real axis. However, Ïp and Ïe can be found by fitting the model equations to the experimental spectra.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electroanalytical Chemistry - Volume 801, 15 September 2017, Pages 122-128
Journal: Journal of Electroanalytical Chemistry - Volume 801, 15 September 2017, Pages 122-128
نویسندگان
Andrei Kulikovsky,