عنوان پایان‌نامه
ساخت و بهینه سازی MEA در حضور نانو مواد برای پیل سوختی پلیمری(PEM) در مقیاس میکرو برای استفاده در تجهیزات قابل حمل
- رشته تحصیلی
- مهندسی انرژیهای جدید پذیر
- مقطع تحصیلی
- کارشناسی ارشد
- محل دفاع
- کتابخانه مرکزی -تالار اطلاع رسانی شماره ثبت: 59333;کتابخانه دانشکده علوم و فنون نوین شماره ثبت: 49
- تاریخ دفاع
- ۳۱ شهریور ۱۳۹۲
- دانشجو
- محمدمهدی اخلاقی
- استاد راهنما
- مهدی مهرپویا, علیرضا نیک فرجام
- چکیده
- دارد
- Abstract
- Fuel cells are electrochemical devices that convert chemical energy of the fuel directly into electricity at high efficiency. Polymer electrolyte fuel cells (PEMFCs) are considered as a key component among other types of fuel cell systems. Membrane Electrode Assembly (MEA) is the main part of the PEMFC formed by two gas diffusion layers (GDLs), two catalyst layers (CLs) and a membrane. This thesis deals with the fabrication of ten electrode and two MEAs for PEMFC and analyzes the effects of gradient of Pt loading on MEAs performance. Analyzing these parameters gives us the chance to determine the optimal catalyst gradient in multi catalyst layers. A comprehensive review of fuel cell technology, polymer electrolyte fuel cells, the fabrication methods of MEAs and the parameter effects was carried out. Tenelectrodes with different specifications (three, two or one catalyst layer and gradient of Pt loading) were fabricated. After that two MEAs with an active area of 6.25 cm2 consisted of Nafion® 117 as a membrane and an electrocatalyst (Pt/C 10%) with loading of 0.4 mg/cm2 and the spraying method was used for preparation. The performance of the MEAs was evaluated by placing them in a single PEMFC and testing with a PEMFC test station. The results obtained from the polarization curves of the MEAs were analyzed. Key words: Structural Optimization; Membrane electrode assembly; 3 electrode cell; Composite Catalyst layer
