Wehave sought the structural origin of the recently reported electrical conductivity of lithium copper phosphate glass system (50-x) Li2O-xCu2O-50 P2O5, as lithium oxide is gradually replaced by Cu2O. The structure of these glasses was determined by X-ray photoelectron spectroscopy, Fourier Transform Infrared Spectroscopy and Raman spectroscopy. The results show the presence of both mobile Cu+ and relatively immobile Cu2+ ions. The relative fraction of Cu2+ [Cu2+ / Cutot] and non-bridging oxygen increases with x; the latter indicating a tendency towards depolymerization of the network. On the other hand, there is enhanced crosslinking within the network as P\\O⋯Li bonds are replaced by relatively covalent P\\O⋯Cu bonds. This leads to a more crosslinked structure and a progressive reduction of the optimumsites for the jumping of both Li+ and Cu+, in agreement with the observed increase of the energy barrier for ion transport as Li2O is replaced by Cu2O.
Data di pubblicazione: | 2016 |
Titolo: | Structural origin of electrical conductivity of copper lithium metaphosphate glasses |
Autore/i: | Mugoni, Consuelo; Jain, H; Montorsi, Monia; Montecchi, Monica; Kovalskiy, A.; Siligardi, Cristina |
Autore/i UNIMORE: | |
Rivista: | |
Volume: | 447 |
Pagina iniziale: | 91 |
Pagina finale: | 97 |
Codice identificativo ISI: | WOS:000381841200014 |
Codice identificativo Scopus: | 2-s2.0-84971668390 |
Citazione: | Structural origin of electrical conductivity of copper lithium metaphosphate glasses / Mugoni, Consuelo; Jain, H; Montorsi, Monia; Montecchi, Monica; Kovalskiy, A.; Siligardi, Cristina. - In: JOURNAL OF NON-CRYSTALLINE SOLIDS. - ISSN 0022-3093. - ELETTRONICO. - 447(2016), pp. 91-97. |
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