ac conductivity and transport studies in phosphate glasses with NASICON-type chemistry
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Selective doping to relax glassified grain boundaries substantially enhances the ionic conductivity of LiTi<inf>2</inf>(PO<inf>4</inf>)<inf>3</inf> glass-ceramic electrolytes
2020, Journal of Power SourcesCitation Excerpt :While optimizing the crystalline phase of the glass-ceramic electrolytes has been effective in enhancing the ionic conductivity, it is important to note that glass electrolytes actually possess much lower ionic conductivity compared to their crystalline counterparts, and thus it is quite counterintuitive that ionic conductivity of hybrid glass-ceramic electrolytes is higher than pure ceramic phases [15,16]. For example, the ionic conductivity of Li1.3Al0.3Ti1.7(PO4)3 glass-ceramic is about 1 × 10−4 S cm−1, much higher than 6 × 10−5 S cm−1 of Li1.3Al0.3Ti1.7(PO4)3 ceramic [17,18], while the corresponding conductivity of glass phase is orders of magnitude smaller, in the range of 10−10–10−8 S cm−1 [19–21]. This begs for an explanation, and the reason may lie in grain boundaries of ceramics, which exhibit high resistance to the ionic conduction [22].
Study of nanostructure and ionic conductivity of Li<inf>1.3</inf>Nb <inf>0.3</inf> V<inf>1.7</inf>(PO<inf>4</inf>)<inf>3</inf> glass ceramics used as cathode material for solid batteries
2014, Journal of Non-Crystalline SolidsCitation Excerpt :Among the glass formers, the phosphates are the best ones and have been widely investigated [3–6]. Moreover, phosphates with the general formula AmBn(PO4)3 crystallize mainly in the NASICON-type (acronym for “Na Super Ionic Conductor”) structure, where A is an alkali or alkaline earth metal ion and B is one or more metal ions in tri, tetra or pentavalent state [7]. NASICON stands for a well-known family of solid electrolytes of sodium superionic conductor.
Effect of Bi<sup>3+</sup> ions on physical, thermal, spectroscopic and optical properties of Nd<sup>3+</sup> doped sodium diborate glasses
2013, Physica B: Condensed MatterCitation Excerpt :The infrared analysis of frequency band which extended from 400–600 cm−1 was assigned to Bi-O bending vibrations in BiO6 octahedral units [45–53]. The band at around 320 cm−1 is attributed to the cage vibrational frequency of sodium cations at their localized states [54]. The content of Nd2O3 present in the glasses suggests that the neodymium ions play a role of network modifier and Bi2O3 exists in the form of BiO6 octahedral units.
Electrical relaxation studies on Na<inf>2</inf>NbMP<inf>3</inf>O<inf>12</inf> (M = Zn, Cd, Pb and Cu) phosphate glasses
2010, Materials Chemistry and PhysicsInfrared and MAS NMR studies of potassium borovanadate glasses
2008, Journal of Molecular StructureIonic conductivity and electrical relaxation of nanocrystalline scandia-stabilized c-zirconia using complex impedance analysis
2008, Physica B: Condensed Matter