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A Mechanism for the Fast Ionic Transport in Nanostructured Oxide‐Ion Solid Electrolytes
Author(s) -
Bellino M. G.,
Lamas D. G.,
Walsöe de Reca N. E.
Publication year - 2006
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200600303
Subject(s) - ionic conductivity , electrolyte , materials science , ionic bonding , diffusion , ion , conductivity , chemical physics , oxide , fast ion conductor , grain boundary , ion transporter , nanotechnology , chemical engineering , chemistry , thermodynamics , electrode , physics , microstructure , metallurgy , organic chemistry , engineering
Ionic transport in nanostructured solid electrolytes is investigated using an atomistic model that clarifies the enhanced conductivity (see figure) of these materials. It is based on the fast diffusion of free oxygen vacancies through the grain boundaries. A transition observed in the ionic conductivity of the nanoceramics as a function of temperature, caused by a change in the transport mechanism, is also explained.