A Japanese research team recently published a report in the online edition of the American journal "Material Chemistry" that they found that the addition of antimony and copper to antimony nickel oxides enhances the oxygen transmission rate of oxides. This result is expected to improve the performance of solid oxide fuel cells.
According to a joint press release issued by the Tokyo Institute of Technology, the Kyushu University, and the High Energy Accelerator Research Institute, Kyushu University professor Ishihara Masaki has previously discovered that niobium nickel oxides containing cerium ions and copper ions and having a K2NiF4 type structure have high oxygen permeability. Rate, but the role of cesium and copper ions in increasing oxygen permeability has been unknown.
In this study, Masashi Ishihara and Professor of Tokyo Institute of Technology, Masahiro Okishima used a neutron diffraction device and an X-ray diffraction device to analyze the crystal structure of niobium-nickel oxide with niobium and copper added. The analysis shows that there is a lot of ozone between the lattices of this crystal.
The researchers pointed out that this element can make a lot of oxygen atoms into the lattice, and copper makes the oxygen on the surface of the lattice more easily move. As the temperature rises from room temperature of 20 degrees Celsius to about 1000 degrees Celsius, the oxygen distribution between the crystal lattices and on the surface of the crystal lattice is connected and the oxide ions are caused to move. At the same time, the oxygen transmission rate will also increase.
The communique said that this achievement has provided a new concept for the design of ion conductors with high oxygen permeability and will help develop new ion conductors. Oxygen conductors with high oxygen permeability can absorb oxygen from the air more efficiently, thereby improving the performance of solid oxide fuel cells.
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