Results 61 to 70 of about 4,245 (208)

Dependence of electroosmosis on polymer structure in proton exchange membranes

Mechanical Engineering Journal, 2017
Effects of polymer structure on the electroosmosis in proton exchange membranes (PEMs) have been investigated using a reactive molecular dynamics simulation.
Takuya MABUCHI, Takashi TOKUMASU
doaj   +1 more source

Bold Claims, Low Wages: Why Voluntary Sustainability Standards (VSS) Struggle to Implement Living Wages

Regulation &Governance, EarlyView.
ABSTRACT Voluntary sustainability standards (VSS)—such as Fairtrade International and the Forest Stewardship Council—aim to improve sustainability in global supply chains by setting high social and environmental standards and certifying businesses that adopt them.
Elizabeth A. Bennett
wiley   +1 more source

Phase change of methanol solution in a microchannel for a reformer using low temperature exhaust heat

Nihon Kikai Gakkai ronbunshu, 2017
Compact power generation systems which consist of methanol reformer and Polymer Electrolyte Fuel Cell (PEFC) are greatly required as emergency power source.
Suguru UEMURA, Katuyuki FUKAI, Keisuke TABATA, Shuichiro HIRAI   +3 more
doaj   +1 more source

Sb or Nb doped tin dioxide aerogels based PEFC cathode

, 2016
International audienceCatalyst supports for Polymer Electrolyte Fuel Cells (PEFC) are currently made up of carbon blacks. This material is however not thermodynamically stable in fuel cell operating conditions and loss of performance is observed with ...
Guétaz, Laure, Maillard, Frédéric, Cognard, Gwenn, Heitzmann, Marie, Ozouf, Guillaume, Beauger, Christian   +5 more
core   +3 more sources

Enhancing Oxygen Reduction Reaction Activity on Pt/C Catalysts for PEFCs Using Phosphonium Ionic Liquid Layers: Effects of Proton Introduction and Physicochemical Properties

Electrochemistry
Polymer electrolyte fuel cells (PEFCs) have attracted significant attention as clean energy conversion systems. Pt nanoparticles are commonly used as cathode catalysts in PEFCs due to their high activity for the oxygen reduction reaction (ORR).
Hirohisa YAMADA, Takuya OKADA, Mitsuhiro MATSUMOTO, Yu YAO, Uta ANDO, Yuri OI, Toshikazu HIGASHI, Yohtaro INOUE, Katsuhiko TSUNASHIMA   +8 more
doaj   +1 more source

Leveraging Digital Advanced Manufacturing to Enable Polymer Electrolyte Fuel Cells With Ultrahigh Gravimetric Power Density

Advanced Energy Materials, Volume 16, Issue 13, 1 April 2026.
This study employs digital advanced manufacturing to develop lightweight, compact porous distributors as alternatives to conventional bipolar plates in PEM fuel cells. A graphene‐coated nickel foam achieves a power density of 1.52 W cm−2, while titanium‐based designs deliver lightweight solutions: an LPBF‐fabricated Gyroid lattice reaches 1.36 W cm−2 ...
Hadi Heidary, Vahid Nasrollahi, Daniel Wilmot, Jacob Bracegirdle‐Morais, Sophie C. Cox, Stefan Dimov, Moataz M. Attallah, Ahmad El‐kharouf, Sara Walker, Robert Steinberger‐Wilckens   +9 more
wiley   +1 more source

Prognostics and Health Management in Polymer Electrolyte Fuel Cells: Current Trends, Challenges, and Future Directions

Fuel Cells, Volume 26, Issue 2, April 2026.
ABSTRACT Prognostics and health management are crucial for the reliability and lifetime assessment of polymer electrolyte fuel cells (PEFCs). Here, we review the current advances on this topic, focusing mainly on key degradation mechanisms and methodologies such as physics‐aware, data‐driven, and hybrid modeling approaches.
Farideh Abdollahi, Kourosh Malek, Thomas Kadyk, Nadiia Kulyk, Christophe Gerling, Michael H. Eikerling   +5 more
wiley   +1 more source

Development of a measurement technique for current-density in PEFC using planar surface coil as a NMR signal detector (Third report: Inversion analysis of current-density distribution generating in PEFC at case of current flowing in lamination direction)

Nihon Kikai Gakkai ronbunshu, 2014
In the second report, a method for measuring the spatial distribution of the electric current generated in a PEFC from the frequency shift of the Nuclear Magnetic Resonance (NMR) signal of water acquired by eight planar surface coils inserted into the ...
Kuniyasu OGAWA, Yasuo YOKOUCHI, Tomoyuki HAISHI, Kohei ITO   +3 more
doaj   +1 more source

Performance evaluation of PEFC stack

, 1996
Polymer electrolyte fuel cells (PEFCs) have many advantages such as high current density, short start-up time and endurance for start-stop cycles. Making use of these advantages, Fuji Electric has been working with the Kansai Electric Power Co., Inc. to explore practical applications of PEFCs for an electric utility use.
Jun-ichi Fujita, Jitsuji Ohtsuki, Yoshihiko Shindo   +2 more
openaire   +2 more sources

Coordinated Multi‐Component Gradient Engineering of Catalyst Layers for Advanced Polymer Electrolyte Fuel Cells

Advanced Functional Materials, Volume 36, Issue 26, 30 March 2026.
This work presents a continuous linear gradient catalyst layer design, a general strategy for improving membrane electrode assemblies across electrochemical devices. Fabricated via a dual‐nozzle spray coating method, the architecture controls the Pt/carbon ratio, ionomer content and ionomer type across the catalyst layer, enhancing proton conduction ...
Shangwei Zhou, Matt P. Tudball, Yiming Guo, Bia Brandt, Adam Zucconi, Wenjia Du, Junfu Bu, Daniel H. C. Wan, Jianuo Chen, Emanuele Magliocca, Feng Ryan Wang, Alexander J.E. Rettie, Patrick S. Grant, Paul R. Shearing, Rhodri Jervis, Thomas S. Miller   +15 more
wiley   +1 more source