New material for solid oxide fuel cells
Higher conductivity and lower coefficient of thermal expansion
To improve conductivity through the change in the number of defects as a starting point for the study, scientists took mixed ferrite neodym and barium Nd0.5Ba0.5FeO3-δ.
To replace part of the iron, cobalt (Co), copper (Cu) and nickel (Ni) were added to the starting material. Complex oxides were obtained by evaporation of solutions and calcination of the solid residue at a temperature of 700 degrees Celsius. The thermal expansion of all mixed materials turned out to be weaker than that of the original Nd0.5Ba0.5FeO3-δ, which includes up to ten percent of the doping metals. To improve the thermal expansion, the material with copper was the best, and in the case of ionic conductivity, the best was cobalt.
A group of scientists from UrFU and Institute of High-Temperature Electrochemistry (Ural Division of the Russian Academy of Science), achieved a balance between good conductive properties and the absence of thermal expansion using cobalt.
Original publication
Most read news
Original publication
Lyagaeva, Julia and Danilov, Nilolay and Tarutin, Arthem and Vdovin, Gennady and Medvedev, Dmitry and Demin, Anatoly and Tsiakaras, Panagiotis; "Designing a protonic ceramic fuel cell with novel electrochemically active oxygen electrodes based on doped Nd0.5Ba0.5FeO3−δ"; Dalton Transactions; 2018
Topics
Organizations
Other news from the department science
Get the chemical industry in your inbox
From now on, don't miss a thing: Our newsletter for the chemical industry, analytics, lab technology and process engineering brings you up to date every Tuesday and Thursday. The latest industry news, product highlights and innovations - compact and easy to understand in your inbox. Researched by us so you don't have to.