کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1294054 973589 2009 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Chromium nitride films on stainless steel as bipolar plate for proton exchange membrane fuel cell
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Chromium nitride films on stainless steel as bipolar plate for proton exchange membrane fuel cell
چکیده انگلیسی

A series of chromium nitride films are prepared on stainless steel substrates by pulsed bias arc ion plating (PBAIP) at different N2 flow rate as bipolar plates for proton exchange membrane fuel cell (PEMFC). The film chemical composition and phase structure are characterized by X-ray photoelectron spectroscopy (XPS) and X-ray diffractometry (XRD). The characterization results indicate that the nitrogen content of deposited films varies from 0.28 to 0.50, and the phase structure changes from mixtures of Cr + Cr2N, pure Cr2N through Cr2N + CrN, to pure CrN. The interfacial contact resistance between samples and carbon paper is measured by Wang's method, and a minimum value of 5.8 mΩ cm2 is obtained under 1.2 MPa compaction force. The anticorrosion property is examined by potentiodynamic test in the simulated corrosive circumstance of the PEMFC under 25 °C, and the lowest corrosive current density of 5.9 × 10−7 A cm−2 is obtained at 0.6 V (vs. SCE). Stainless steel substrates coated by the film with lowest contact resistance are chosen as the bipolar plates to assemble cells. An average voltage value of 0.62 V is achieved at 500 mA cm−2, which is close to that of the cell with Ag-plated bipolar plates.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 194, Issue 2, 1 December 2009, Pages 976–980
نویسندگان
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