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

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Journal of Energy Chemistry 2019年第8期28卷 168-173,I0006页

作者： Irene Gatto Ada Sacca Vincenzo Baglio Antonino Salvatore Arico Claudio Oldani Luca Merlo Alessandra Carbone CNR-ITAE Institute for Advanced Energy Technologies"N. Giordano" Via S. Lucia Sopra Contesse 5Messina Italy Solvay Specialty Polymers Viale Lombardia 20 20021 Bollate MI Italy

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(GDL). 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^■ 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 °C, with low relative humidity of the reactant gases. The electrochemical performance of the prepared MEAs was tested in a H2/Air 25 cm^2 single cell in terms of polarization curves and accelerated stress test(AST).

关键词： Aquivion^(■) Short-side chain PEFC hot-pressing parameters Automotive applications

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Research on utilizing recycled plastic to make environment-friendly plywood

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Forestry Studies in China 2010年第4期12卷 218-222页

作者： CUI Ting SONG Kun-lin ZHANG Shuang-bao College of Materials Science and Technology Beijing Forestry University Beijing 100083 P. R. China Research Institute of Wood Industry Chinese Academy of Forestry Beijing 100091 P. R. China

In our study, we replaced traditional adhesives with compounds made with recycled plastic shopping bags in order to make hot-melt plywood using various amounts of plastic film, different hot-pressing temperatures and hot-pressing times. All three variables have an effect on the intensity and water-resistance of plywood. The results show that the bonding strength of plywood does not increase with increasing amounts of plastic film. When the hot-pressing temperature is increased to 150℃, the bonding strength does not necessarily increase any further. At a hot-pressing time of 6 min, the bonding strength reaches a maximum, after which it will decrease. The optimum hot-pressing parameters are as follows： 100 g·m^-2 of recycled plastic, a hot-pressing temperature of 150℃ and a hot-pressing time of 6 min. This study puts forward a new idea of making use of plastic waste, which, ultimately, may solve the problem of formaldehyde emission without damaging the environment. It has enormous potential market applications.

关键词： recycled plastic shopping bags hot-melt plywood hot-pressing parameters comprehensive performance

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