Inherent emf relaxation of electrochemical cells with nanocrystalline Ag electrodes |
| |
Authors: | Alexandra Schröder Joachim Maier Werner Sitte |
| |
Affiliation: | a Max-Planck-Institute for Solid State Research, Heisenbergstraße 1, D-70569 Stuttgart, Germany b University of Leoben, Department of General, Analytical and Physical Chemistry, Franz-Josef-Straße 18, A-8700 Leoben, Austria |
| |
Abstract: | The open circuit voltage of the electrochemical cell Ag (nano)|solid silver electrolyte|Ag (macro) is found to be inherently unstable. Even under conditions which support the morphological stability of the arrangement of nanocrystalline silver, the particles grow significantly as soon as they function as electrodes; i.e. when they are in contact with a silver electrolyte and connected electronically at the same time. The process is shown to be due to electrochemical Ostwald ripening with the interfacial transfer of Ag+ through the Ag/electrolyte interface being the rate limiting step. Its activation energy is 0.01 eV. The decay is in good agreement with modelling results. |
| |
Keywords: | Ostwald ripening Capillary effects Size effects Solid electrolyte Grain growth |
本文献已被 ScienceDirect 等数据库收录! |