Gas Purge for Switching from Electrolysis to Fuel Cell Operation in Polymer Electrolyte Unitized Reversible Fuel Cells

2010 ◽  
Vol 157 (7) ◽  
pp. B1072 ◽  
Author(s):  
H. Ito ◽  
T. Maeda ◽  
A. Kato ◽  
T. Yoshida ◽  
O. Ulleberg
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Gas Purge ◽  
Fuel Cell Operation

Gas Purge in a Polymer Electrolyte Fuel Cell

2007 ◽  
Vol 154 (11) ◽  
pp. B1158 ◽  
Author(s):  
Puneet K. Sinha ◽  
Chao-Yang Wang
Keyword(s):  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Fuel Cell ◽  
Gas Purge

scholarly journals Propriedades físico-químicas relacionadas ao desenvolvimento de membranas de Nafion® para aplicações em células a combustível do tipo PEMFC

Polímeros ◽  
2008 ◽  
Vol 18 (4) ◽  
pp. 281-288 ◽  
Author(s):  
Carlos E. Perles
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Fuel Cell

Embora não seja tecnologia recente, as células a combustível ou Fuel Cells (FC) continuam recebendo grande atenção, pois são consideradas como "fontes de energia do futuro" devido a características como alto rendimento energético e baixa emissão de poluentes, permitindo a extensão o tempo de vida das reservas fósseis e contribuindo para a melhoria da qualidade de vida. Atualmente, as pesquisas estão direcionadas, principalmente, ao desenvolvimento de FC para aplicações em sistemas móveis e portáteis. De todas as tecnologias existentes, a mais promissora para essa finalidade é a célula a combustível de eletrólito polimérico, conhecida como PEMFC (Polymer Electrolyte Fuel Cell) cuja pesquisa encontra-se focada, principalmente, no desenvolvimento de membranas poliméricas, com o objetivo de reduzir os custos de produção. Este trabalho será focado nos aspectos físico-químicos do desenvolvimento de membranas poliméricas. Serão discutidos aspectos estruturais do Nafion® relacionado-os as seguintes propriedades físico-químicas: fluxo eletrosmótico, permeabilidade gasosa, transporte de água através da membrana, estabilidade química e térmica. Toda a discussão será realizada para polímeros perfluorados, utilizando o Nafion® como modelo representante dessa classe de polímeros.

scholarly journals Highly durable Pt-free fuel cell catalysts prepared by multi-step pyrolysis of Fe phthalocyanine and phenolic resin

2014 ◽  
Vol 4 (5) ◽  
pp. 1400-1406 ◽  
Author(s):  
Yuta Nabae ◽  
Mayu Sonoda ◽  
Chiharu Yamauchi ◽  
Yo Hosaka ◽  
Ayano Isoda ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Phenolic Resin ◽  
Polymer Electrolyte Membrane ◽  
Cell Performance ◽  
Cathode Catalyst ◽  
Fuel Cell Performance ◽  
Electrolyte Membrane ◽  
Fuel Cell Catalysts

A Pt-free cathode catalyst for polymer electrolyte membrane fuel cells has been developed by multi-step pyrolysis of Fe phthalocyanine and phenolic resin and shows a quite promising fuel cell performance.

Durability of a novel sulfonated polyimide membrane in polymer electrolyte fuel cell operation

2009 ◽  
Vol 54 (3) ◽  
pp. 1076-1082 ◽  
Author(s):  
Akihiro Kabasawa ◽  
Jumpei Saito ◽  
Hiroshi Yano ◽  
Kenji Miyatake ◽  
Hiroyuki Uchida ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Fuel Cell ◽  
Polyimide Membrane ◽  
Sulfonated Polyimide ◽  
Fuel Cell Operation

Polymer electrolyte membrane fuel cell flow field designs and approaches for performance enhancement

2019 ◽  
Vol 234 (8) ◽  
pp. 1189-1214 ◽  
Author(s):  
Erman Çelik ◽  
İrfan Karagöz
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Flow Field ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Membrane ◽  
High Energy ◽  
Cell Performance ◽  
High Energy Density ◽  
Field Development ◽  
Electrolyte Membrane

Polymer electrolyte membrane fuel cells are carbon-free electrochemical energy conversion devices that are appropriate for use as a power source on vehicles and mobile devices emerging with their high energy density, lightweight structure, quick startup and lower operating temperature capabilities. However, they need more developments in the aspects of reactant distribution, less pressure drops, precisely balanced water content and heat management to achieve more reliable and higher overall cell performance. Flow field development is one of the most important fields of study to increase cell performance since it has decisive effects on performance parameters, including bipolar plate, and thus fuel cell weight. In this study, recent developments on conventional flow field designs to eliminate their weaknesses and innovative design approaches and flow field architectures are obtained from patent databases, and both numerical and experimental scientific studies. Fundamental designs that create differences are introduced, and their effects on the performance are discussed with regard to origin, objective, innovation strategy of design besides their strength and probable open development ways. As a result, significant enhancements and design strategies on flow field designs in polymer electrolyte membrane fuel cells are summarized systematically to guide prospective flow field development studies.

Analysis and Optimization of Transient Response of Polymer Electrolyte Fuel Cells

2015 ◽  
Vol 12 (1) ◽  
Author(s):  
A. Verma ◽  
R. Pitchumani
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Transient Response ◽  
Single Channel ◽  
Rapid Change ◽  
Pem Fuel Cell ◽  
Pem Fuel Cells ◽  
Operating Parameters ◽  
Automotive Applications

Polymer electrolyte membrane (PEM) fuel cells are well suited for automotive applications compared to other types of fuel cells owing to their faster transient response and low-temperature operation. Due to rapid change in loads during automotive applications, study of dynamic behavior is of paramount importance. This study focuses on elucidating the transient response of a PEM fuel cell for specified changes in operating parameters, namely, voltage, pressure, and stoichiometry at the cathode and the anode. Transient numerical simulations are carried out for a single-channel PEM fuel cell to illustrate the response of power as the operating parameters are subjected to specified changes. These parameters are also optimized with an objective to match the power requirements of an automotive drive cycle over a certain period of time.

Wetting properties of porous high temperature polymer electrolyte fuel cells materials with phosphoric acid

2019 ◽  
Vol 21 (24) ◽  
pp. 13126-13134 ◽  
Author(s):  
J. Halter ◽  
T. Gloor ◽  
B. Amoroso ◽  
T. J. Schmidt ◽  
F. N. Büchi
Keyword(s):  
Fuel Cells ◽  
High Temperature ◽  
Fuel Cell ◽  
Phosphoric Acid ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Fuel Cells ◽  
Polymer Electrolyte Fuel Cell ◽  
Wetting Behavior ◽  
Wetting Properties ◽  
Fuel Cell Materials

The influence of phosphoric acid temperature and concentration on the wetting behavior of porous high temperature polymer electrolyte fuel cell materials is investigated.

Durability of Sulfonated Polyimide Membrane Evaluated by Long-Term Polymer Electrolyte Fuel Cell Operation

2006 ◽  
Vol 153 (6) ◽  
pp. A1154 ◽  
Author(s):  
Makoto Aoki ◽  
Naoki Asano ◽  
Kenji Miyatake ◽  
Hiroyuki Uchida ◽  
Masahiro Watanabe
Keyword(s):  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Fuel Cell ◽  
Polyimide Membrane ◽  
Sulfonated Polyimide ◽  
Fuel Cell Operation
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