نتایج جستجو برای: cathode catalyst layer
تعداد نتایج: 337726 فیلتر نتایج به سال:
Oxygen-reducing biocathodes previously developed for microbial fuel cells (MFCs) have required energy-intensive aeration of the catholyte. To avoid the need for aeration, the ability of biocathodes to function with passive oxygen transfer was examined here using air cathode MFCs. Two-chamber, air cathode MFCs with biocathodes produced a maximum power density of 554 ± 0 mW/m(2), which was compar...
A simple and effective method for the management of the passive layer in solid state batteries is reported. The success is achieved using a composite cathode with embedded channels of polyaniline allowing smooth charge transfer across the passive layer. The composite cathode manifested better performance in terms of the cell characteristics and shelf life.
The recent surge of interest in non-noble-metal porphyrin and phthalocyanine catalysts has been prompted by their potential to replace Pt as cathodic catalysts in polymer electrolyte membrane fuel cells (PEMFCs). However, to realize the apparent benefits of the metal–N-coordinated catalysts in high-power fuel cells, advances in catalyst design and synthesis are required to produce catalysts wit...
The resistance of the cathode oxygen reduction reaction in polymer electrolyte fuel cells must be reduced for improving performance. Therefore, it is important to thoroughly understand relationship between heterogeneous structures and cell However, difficult obtain such an understanding using experimental approaches typical uniform porous simulations. In this study, numerical analysis was used ...
Impact of the Cathode Layer Printing Process on the Performance of MEA Integrating PGM Free Catalyst
In this work, platinum group metal (PGM) free-based cathode active layers were prepared using different printing techniques. The membrane electrode assemblies (MEAs) integrate a PGM free catalyst based on Fe, N and C atoms at the side. Scanning electron microscopy (SEM) images of MEA cross sections showed strong impact fabrication process structure, porosity ionomer repartition. MEAs characteri...
Adopting the emerging technology of printed electronics in manufacturing novel ultrathin flat panel displays attracts both academic and industrial interests because of the challenge in the device physics and the potential of reducing production costs. Here we produce all-solution processed polymer light-emitting diode displays by solution-depositing the cathode and utilizing a multifunctional b...
Electrochemical impedance spectroscopy is an important tool for fuel-cell analysis and monitoring. This study focuses on the low-AC frequencies (2–0.1 Hz) to show that thickness of catalyst layer significantly influences overall resistance cell. By combining known models, a new equivalent circuit model was generated. The able simulate signal in complete frequency spectrum 105–10−2 Hz, usually u...
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