Results 61 to 70 of about 35,743 (307)
A dynamic PEM-fuel cell stack model for system simulation
, 2005 A dynamic, mathematical model of a proton-exchange-membrane fuel cell stack is presented. The model is time-dependent, one-dimensional along the channel and non-isothermal.
Schumacher, Jürgen +3 more
core +1 more source
Polarizable Vanadium Dipoles Promote Water Dissociation on Vanadium‐Based Metal Organic Framework
Advanced Functional Materials, EarlyView.The polarization of unpaired V 3d electrons weakens the H─O bond to improve water dissociation by the dual Vδ+:O─H and Pλ−:H─O coupling hydrogen bonds formation and relaxation. P@V‐MOF electrocatalyst shows low overpotentials (94 mV in acid, 178 mV in neutral, and 77 mV in alkaline solutions) with excellent stability for effective overall water ...
Xinjuan Liu +13 more
wiley +1 more source
Effect of Copper Channel Widths on the Performance of Direct Methanol Fuel Cells Under Various Operating Temperatures [PDF]
, 2015 In this study, pure copper was used for the bipolar plates of the direct methanol fuel cells (DMFCs), and the anode and cathode channels were manufactured on the plates in order to reduce the electrical resistance and the volume of the DMFCs.
Luo, W-J +1 more
core
Applied Sciences, 2022 The fluid flow and heat transfer of hydrocarbon fuel play a significant role in developing regenerative cooling technology for advanced aeroengines. Numerical simulations have been conducted to investigate the flow and heat transfer characteristics of ...
Ying Zhang +5 more
doaj +1 more source
Advanced Functional Materials, EarlyView.Liquid‐phase transmission electron microscopy enables direct observation of nucleation and growth processes in solution. This review is dedicated to the remembrance of Helmut Cölfen and highlights recent studies on complex materials—oxides, biominerals, organic–inorganic crystals—which were central to his research activity. It summarizes key milestones,
Charles Sidhoum +5 more
wiley +1 more source
A dynamic two-phase flow model of proton exchange membrane fuel cells
, 2004 A dynamic two phase flow model for proton exchange membrane (PEM) fuel cells is presented. The two dimensional along-the-channel model includes the two phase flow of water (gaseous and liquid) in the porous diffusion layers and in the catalyst layers, as
Ohlberger, Mario +4 more
core +1 more source
Nuclear Engineering and Technology, 2017 The feasibility of cooling in a pressurized heavy water reactor after a large break loss-of-coolant accident has been analyzed using Multidimensional Analysis of Reactor Safety-KINS Standard code during the recirculation phase.
Seon Oh Yu, Yong Jin Cho, Sung Joong Kim
doaj +1 more source
Advanced Functional Materials, EarlyView.We present a tissue‐stimulator platform for seamless electrode integration with pancreatic tissue, applying uniform electrical stimulation through optimized design with biohybrid 3D printing. Advantageous effects of electrical stimulation on β‐cell function were observed, including enhanced calcium signaling, islet morphology, and maturation.
Jihwan Kim +7 more
wiley +1 more source
Nihon Kikai Gakkai ronbunshu, 2018 An anode-supported honeycomb SOFC gives high volumetric power density and improves thermo-mechanical durability at high temperatures. We have so far fabricated and tested a honeycomb cell with a cathode layer of LSM and an electrolyte layer of 8YSZ on a ...
Hironori NAKAJIMA +2 more
doaj +1 more source
Cyclic Olefin Copolymers as Versatile Materials for Advanced Engineering Applications
Advanced Functional Materials, EarlyView.Cyclic olefin copolymers (COCs) are presented as highly versatile materials combining tunable synthesis, excellent optical properties, and mechanical robustness. Their potential spans microfluidics, bioengineering, and advanced electronics, while emerging self‐healing and sustainable solutions highlight future opportunities.
Giulia Fredi +3 more
wiley +1 more source