scholarly journals Fuel Cell Electrode Characterization Using Neutron Scattering

2019 ◽  
Author(s):  
Olaf Holderer ◽  
Marcelo Carmo ◽  
Meital Shviro ◽  
Werner Lehnert ◽  
Yohei Noda ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Large Scale ◽  
Length Scales ◽  
Fuel Cell Electrode ◽  
Molecular Length ◽  
Energy Conversion And Storage ◽  
Ion Conducting ◽  
Cell Electrode ◽  
The Individual ◽  
And Storage

Electrochemical energy conversion and storage is key for the use of regenerative energies at large scale. A thorough understanding of the individual components, such as the ion conducting membrane and the electrode layers, can be obtained with scattering techniques on atomit to molecular length scales. The largely heterogeneous electrode layers of High-Temperature Polymer Electrolyte Fuel Cells are studied in this work with small- and wide-angle neutron scattering at the same time with the iMATERIA diffractometer at the spallation neutron source at J-PARC, opening a view on structural properties on atomic to mesoscopic length scales.

scholarly journals Fuel Cell Electrode Characterization Using Neutron Scattering

Materials ◽  
2020 ◽  
Vol 13 (6) ◽  
pp. 1474 ◽  
Author(s):  
Olaf Holderer ◽  
Marcelo Carmo ◽  
Meital Shviro ◽  
Werner Lehnert ◽  
Yohei Noda ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Large Scale ◽  
Proton Mobility ◽  
Length Scales ◽  
Fuel Cell Electrode ◽  
Molecular Length ◽  
Energy Conversion And Storage ◽  
Ion Conducting ◽  
Cell Electrode ◽  
The Individual

Electrochemical energy conversion and storage is key for the use of regenerative energies at large scale. A thorough understanding of the individual components, such as the ion conducting membrane and the electrode layers, can be obtained with scattering techniques on atomic to molecular length scales. The largely heterogeneous electrode layers of High-Temperature Polymer Electrolyte Fuel Cells are studied in this work with small- and wide-angle neutron scattering at the same time with the iMATERIA diffractometer at the spallation neutron source at J-PARC, opening a view on structural properties on atomic to mesoscopic length scales. Recent results on the proton mobility from the same samples measured with backscattering spectroscopy are put into relation with the structural findings.

NiMoOx as a Highly Protective layer against Photocorrosion for Solar Seawater Splitting

2022 ◽  
Author(s):  
Xiaotian Guo ◽  
Xianhu Liu ◽  
Lei Wang
Keyword(s):  
Solar Energy ◽  
Energy Conversion ◽  
Large Scale ◽  
Surface Reaction ◽  
Protective Layer ◽  
Reaction Dynamics ◽  
Solar Energy Conversion ◽  
Promising Alternative ◽  
Energy Conversion And Storage ◽  
And Storage

Photoelectrochemical (PEC) seawater splitting is a promising alternative for solar energy conversion and storage. However, the sluggish surface reaction dynamics and photocorrosion/corrosion generally limit the semiconductors for potential large-scale application....

Multiscale Tomography-Based Analysis of Polymer Electrolyte Fuel Cells: Towards a Fully Resolved Gas Diffusion Electrode Reconstruction

2017 ◽  
Vol 15 (1) ◽  
Author(s):  
Matthias Klingele ◽  
Riko Moroni ◽  
Severin Vierrath ◽  
Simon Thiele
Keyword(s):  
Fuel Cell ◽  
Large Scale ◽  
Catalyst Layer ◽  
Gas Diffusion ◽  
Cell System ◽  
Polymer Electrolyte Fuel Cells ◽  
Fuel Cell Electrodes ◽  
Fuel Cell Electrode ◽  
Cell Electrode ◽  
And Control

The microstructure of a fuel cell electrode largely determines the performance of the whole fuel cell system. In this regard, tomographic imaging is a valuable tool for the understanding and control of the electrode morphology. The distribution of pore- and feature-sizes within fuel cell electrodes covers several orders of magnitude, ranging from millimeters in the gas diffusion layer (GDL) down to few nanometers in the catalyst layer. This obligates the application of various tomographic methods for imaging every aspect of a fuel cell. This perspective evaluates the capabilities, limits, and challenges of each of these methods. Further, it highlights and suggests efforts toward the integration of multiple tomographic methods into single multiscale datasets, a venture which aims at large-scale, and morphologically fully resolved fuel cell reconstructions.

scholarly journals SYNTHESIS AND ELECTROCHEMICAL PROPERTIES OF POROUS CNTs-FERRITE HYBRID NANOSTRUCTURES FOR SUPERCAPACITOR

2019 ◽  
Vol 57 (1) ◽  
pp. 58 ◽  
Author(s):  
Le Trong Lu ◽  
Le Thi Thanh Tam ◽  
Doan Thanh Tung ◽  
Ngo Thanh Dung ◽  
Hoang Tran Dung ◽  
...  
Keyword(s):  
Electrochemical Properties ◽  
Solvothermal Method ◽  
Scale Up ◽  
Hybrid Nanostructures ◽  
Storage Devices ◽  
Energy Conversion And Storage ◽  
Hybrid Aerogels ◽  
The Individual ◽  
And Storage

Carbon nanotubes (CNTs)-ferrites hybrid nanomaterials have attracted extensive research interest owing to their large specific surfae area, high electrical, thermal conductiviy and outstanding electrochemical properties, which are widely investigated for energy conversion and storage devices. Regular syntheses rely mainly on the in situ growth of ferrite nanoparticles (NPs) in the presence of the preformed CNTs. It is very challenging to control the composition and morphology of the individual components, and to scale-up the synthesis. In this work, ferrite NPs were prepared by  solvothermal method. Porous (3D) CNTs-ferrites hybrid aerogels were fabricated by using freeze gelation method. The results indicate that the obtained 3D CNTs-ferrites aerogels were very porous, highly electrical conductive and have good electrochemical properties.

scholarly journals Reversible solid-oxide cells for clean and sustainable energy

Clean Energy ◽  
2019 ◽  
Vol 3 (3) ◽  
pp. 175-201 ◽  
Author(s):  
M B Mogensen ◽  
M Chen ◽  
H L Frandsen ◽  
C Graves ◽  
J B Hansen ◽  
...  
Keyword(s):  
Energy Conversion ◽  
Large Scale ◽  
Sustainable Energy ◽  
Solid Oxide ◽  
Electrical Grid ◽  
Transportation Sector ◽  
Sufficient Energy ◽  
Energy Conversion And Storage ◽  
Storage Technologies ◽  
And Storage

Abstract This review gives first a brief view of the potential availability of sustainable energy. It is clear that over 100 times more solar photovoltaic energy than necessary is readily accessible and that practically available wind alone may deliver sufficient energy supply to the world. Due to the intermittency of these sources, effective and inexpensive energy-conversion and storage technology is needed. Motivation for the possible electrolysis application of reversible solid-oxide cells (RSOCs), including a comparison of power-to-fuel/fuel-to-power to other energy-conversion and storage technologies is presented. RSOC electrochemistry and chemistry of H2O, CO2, H2, CO, CnHm (hydrocarbons) and NH3, including thermodynamics and cell performance, are described. The mechanical strength of popular cell supports is outlined, and newly found stronger materials are mentioned. Common cell-degradation mechanisms, including the effect of common impurities in gases and materials (such as S and Si), plus the deleterious effects of carbon deposition in the fuel electrode are described followed by explanations of how to avoid or ease the consequences. Visions of how RSOCs powered by sustainable energy may be applied on a large scale for the transportation sector via power-to-fuel technology and for integration with the electrical grid together with seasonal storage are presented. Finally, a brief comparison of RSOCs to other electrolysis cells and an outlook with examples of actions necessary to commercialize RSOC applications are sketched.

Models, Practices and Methods of Reading: Evolution in Time and Space

2009 ◽  
pp. 59-64
Author(s):  
Yulia P. Melentyeva
Keyword(s):  
Large Scale ◽  
Social Groups ◽  
National Program ◽  
Time And Space ◽  
Lack Of Information ◽  
The Individual

In recent years as public in general and specialist have been showing big interest to the matters of reading. According to discussion and launch of the “Support and Development of Reading National Program”, many Russian libraries are organizing the large-scale events like marathons, lecture cycles, bibliographic trainings etc. which should draw attention of different social groups to reading. The individual forms of attraction to reading are used much rare. To author’s mind the main reason of such an issue has to be the lack of information about forms and methods of attraction to reading.

Sign in / Sign up

Export Citation Format

Share Document