Dr. Toshiyuki Mori, Group Leader of the Hetero-interface Design Group, Battery and Fuel Cell Field, Global Research Center for Environment and Energy Based on Materials Science (GREEN), National Institute for Materials Science (President: Sukekatsu Ushioda), and Dr. Zhipeng Li, a Postdoctoral Researcher at GREEN, in joint research with Prof. John Drennan of the University of Queensland Centre for Microscopy and Microanalysis (Australia), the Dalian Polytechnic University (China), and the Dalian Institute of Chemical Physics, Chinese Academy of Science (China), clarified for the first time the cluster structure which has an extremely large effect on the long-term stability of solid oxide fuel cells (SOFC) for independent distributed power generation. This result was achieved by transmission electron microscope (TEM) observation and computer simulation based on the results thereof.
Active development of fuel cells for home use and large-scale generating systems using SOFC has been underway up to the present. However, while it was possible to manufacture devices which sufficiently satisfied performance requirements, elements of instability remained from the viewpoints of reliability and life, and these were major obstacles to practical application.
In this experiment, the nanoscale defect structures of high performance specimens and specimens which exhibited serious deterioration in performance were observed using a high resolution transmission electron microscope (TEM), and their distinctive features were then analyzed in computer simulations. This research ascertained for the first time that a “new oxygen defect cluster structure” which has a structure different from the “oxygen defect (oxygen vacancy) cluster structure” long considered to be the cause of reduced performance, forms in the material, triggering a phase transition, and this has a negative impact on the reliability and durability of fuel cells.
Various puzzling phenomena in SOFC, had been un-explained until now. These are (1) reason why a crystal phase transition occurs together with performance deterioration, (2) reason why adequate reliability cannot be maintained, etc., and they can be interpreted rationally using a model of this oxygen defect cluster structure. As a result effective solutions to these problems can be proposed based on materials science, and the development of high performance, high reliability, long life SOFC materials for use in independent distributed generation is expected to become possible.
These results were published online on November 7 in “Rapid communications” in the journal of the American Institute of Physics, Physical Review B.
Plant inspiration could lead to flexible electronics
22.06.2017 | American Chemical Society
A rhodium-based catalyst for making organosilicon using less precious metal
22.06.2017 | Tokyo Institute of Technology
Heatwaves in the Arctic, longer periods of vegetation in Europe, severe floods in West Africa – starting in 2021, scientists want to explore the emissions of the greenhouse gas methane with the German-French satellite MERLIN. This is made possible by a new robust laser system of the Fraunhofer Institute for Laser Technology ILT in Aachen, which achieves unprecedented measurement accuracy.
Methane is primarily the result of the decomposition of organic matter. The gas has a 25 times greater warming potential than carbon dioxide, but is not as...
Hydrogen is regarded as the energy source of the future: It is produced with solar power and can be used to generate heat and electricity in fuel cells. Empa researchers have now succeeded in decoding the movement of hydrogen ions in crystals – a key step towards more efficient energy conversion in the hydrogen industry of tomorrow.
As charge carriers, electrons and ions play the leading role in electrochemical energy storage devices and converters such as batteries and fuel cells. Proton...
Scientists from the Excellence Cluster Universe at the Ludwig-Maximilians-Universität Munich have establised "Cosmowebportal", a unique data centre for cosmological simulations located at the Leibniz Supercomputing Centre (LRZ) of the Bavarian Academy of Sciences. The complete results of a series of large hydrodynamical cosmological simulations are available, with data volumes typically exceeding several hundred terabytes. Scientists worldwide can interactively explore these complex simulations via a web interface and directly access the results.
With current telescopes, scientists can observe our Universe’s galaxies and galaxy clusters and their distribution along an invisible cosmic web. From the...
Temperature measurements possible even on the smallest scale / Molecular ruby for use in material sciences, biology, and medicine
Chemists at Johannes Gutenberg University Mainz (JGU) in cooperation with researchers of the German Federal Institute for Materials Research and Testing (BAM)...
Germany counts high-precision manufacturing processes among its advantages as a location. It’s not just the aerospace and automotive industries that require almost waste-free, high-precision manufacturing to provide an efficient way of testing the shape and orientation tolerances of products. Since current inline measurement technology not yet provides the required accuracy, the Fraunhofer Institute for Laser Technology ILT is collaborating with four renowned industry partners in the INSPIRE project to develop inline sensors with a new accuracy class. Funded by the German Federal Ministry of Education and Research (BMBF), the project is scheduled to run until the end of 2019.
New Manufacturing Technologies for New Products
19.06.2017 | Event News
13.06.2017 | Event News
13.06.2017 | Event News
22.06.2017 | Life Sciences
22.06.2017 | Materials Sciences
22.06.2017 | Materials Sciences