Enhancing grain boundary ionic conductivity in mixed ionic–electronic conductors
نویسندگان
چکیده
منابع مشابه
Enhancing grain boundary ionic conductivity in mixed ionic–electronic conductors
Mixed ionic-electronic conductors are widely used in devices for energy conversion and storage. Grain boundaries in these materials have nanoscale spatial dimensions, which can generate substantial resistance to ionic transport due to dopant segregation. Here, we report the concept of targeted phase formation in a Ce0.8Gd0.2O2-δ-CoFe2O4 composite that serves to enhance the grain boundary ionic ...
متن کاملTest of universal scaling of ac conductivity in ionic conductors
Electrical relaxation data of crystalline yttria-stabilized zirconia are used to analyze the permittivity change observed in the spectra of the real part of the permittivity in ionic conducting materials. It is found that this permittivity change is independent of both temperature and mobile-ion concentration, and it is determined solely by the degree of interaction among ions in the relaxation...
متن کاملIonic conductivity of nanocrystalline yttria-stabilized zirconia: Grain boundary and size effects
O. J. Durá,1 M. A. López de la Torre,1 L. Vázquez,2 J. Chaboy,3 R. Boada,3 A. Rivera-Calzada,4 J. Santamaria,4 and C. Leon4 1Departamento de Física Aplicada and INEI, Universidad de Castilla-la Mancha, 13071 Ciudad Real, Spain 2Instituto de Ciencia de Materiales de Madrid, CSIC, Cantoblanco, 28049 Madrid, Spain 3Instituto de Ciencia de Materiales de Aragón, Consejo Superior de Investigaciones C...
متن کاملDistributions of Charged Defects in Mixed Ionic - Electronic Conductors
General analytical solutions to transport equations are presented for a mixed ionic-electronic conductor (MIEC) subject to various electrical and chemical conditions at the surfaces. The derived general expressions can be used to predict the steady-state distributions of defects and electrical potential within the MIEC as a function of an external stimulus for transport: an electric field, a gr...
متن کاملNon Linear Modeling of Mixed Ionic Electronic Conductors
Mixed ionic electronic conductors are currently of great interest for SOFC applications. For example, ceria-containing anodes can be operated directly on hydrocarbons without coking, and in addition can be used at lower temperatures than Ni/YSZ (see Trovarelli (1)). In order to design, optimize, and characterize MIEC electrodes, it is very useful to have models to aid in interpreting experiment...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nature Communications
سال: 2015
ISSN: 2041-1723
DOI: 10.1038/ncomms7824