Evaluation of hot pressing parameters on the electrochemical performance of MEAs based on Aquivion(R) PFSA membranes

• 作者: Ada Saccà Alessandra Carbone Antonino Salvatore Aricò Claudio Oldani Irene Gatto Luca Merlo Vincenzo Baglio
• 来源期刊: 能源化学
• 年，卷（期）: 2019,（8）
• 页码范围: 168-173
• 页数: 6页
• 语种: 英文

摘要

The membrane-electrodes assembly (MEA) is the core of the Polymer Electrolyte Fuel Cell (PEFC).It consists of a membrane,catalytic (CL) and gas diffusion layers (CDL).In order to manufacture MEAs with suitable performance,a hot-pressing procedure is generally used.The relevant parameters are the temperature,pressure and time of hot-pressing.Such variables need to be adjusted as a function of the type of ionomer used in the catalytic layer and membrane.In this study,an evaluation of the temperature of hot-pressing was carried out and its influence on MEA electrochemical performance was assessed.In particular,preparation trials of MEAs were carried out with reinforced experimental membranes based on Aquivion(R) short-side-chain PFSA (by Solvay Specialty Polymers).The membranes were coupled to gas diffusion electrodes,and MEAs were manufactured using different temperatures for the hot-pressing procedure in order to evaluate their influence on the electrochemical performance of PEFCs,in the temperature range of 80-95 ℃,with low relative humidity of the reactant gases.The electrochemical performance of the prepared MEAs was tested in a H2/Air 25 cm2 single cell in terms of polarization curves and accelerated stress test (AST).