Nanocrystallisation in vanadate phosphate and lithium iron vanadate phosphate glasses
Tomasz Pietrzak , Jerzy Garbarczyk , Marek Wasiucionek , Jan Nowiński
AbstractIn this paper we have summarised our recent research on nanocrystallisation in vanadate-phosphate (VP) and lithiumiron-vanadate-phosphate (LFVP) glasses. These materials are amorphous analogues of crystalline V2O5 or LiFePO4 cathode materials for Li-ion batteries. The influence of synthesis and further thermal treatment conditions on electrical, thermal and electrochemical properties has been studied. In particular, a significant increase in electronic conductivity (up to 0.7×10-1 and 7×10-3 S/cm for VP and LFVP nanomaterials, respectively) was observed as a result of thermal nanocrystallisation. The microstructure has been observed and studied by a combination of XRD, SEM/TEM and EDX methods. Densely packed, small (15-30 nm and 5-15 nm in size) grains were observed in VP and LFVP materials, respectively. The significant increase in the conductivity is discussed in terms of Mott's model of electron hopping and a core-shell model. copyright © of the Society.
|Journal series||Physics and Chemistry of Glasses-European Journal of Glass Science and Technology Part B, ISSN 1753-3562|
|Publication size in sheets||0.55|
|Keywords in English||Cathodes; Glass; Lithium compounds; Lithium-ion batteries; Nanocrystals, Cath-ode materials; Core-shell model; Electron hopping; Electronic conductivity; Nanocrystallisation; Phosphate glass; Recent researches; Treatment conditions, Amorphous materials|
|Score|| = 20.0, 28-11-2017, ArticleFromJournal|
= 20.0, 28-11-2017, ArticleFromJournal
|Publication indicators||: 2016 = 0.588 (2) - 2016=0.574 (5)|
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