Lithium conducting glass ceramic with Nasicon structure

Lithium storage capability of lithium ion conductor Li1.5Al0.5Ge1.5(PO4)3

“…Galvanostatic charge/discharge cycling experiment was performed in the potential range from 0.01 V to 2.5 V at a current density of 0.1 mA/cm 2 . [16,[21][22][23][24][25][26][27], indicating that LAGP has been formed. Although 25% of Ge has been substituted by Al, the diffraction peaks are not dramatically shifted, attributing to the similarity in ionic radius between Ge 4+ (0.053 nm) and Al 3+ (0.050 nm).…”

“…Recently, the glass-ceramic Li 1+x Al x Ge 2−x (PO 4 ) 3 (LAGP) has gained special interest because it is particularly stable against Li metal and has a high ionic conductivity (as high as 4.62 × 10 −3 S/cm at 27 • C) [16,[21][22][23][24][25][26][27]. Partial substitution of Ge 4+ with Al 3+ has shown improved porous density of LiGe 2 (PO 4 ) 3 as well as enhanced Li + ion conductivity.…”

Na+ ion conductors of glass–ceramics in the system Na1+xAlxGe2−xP3O12(0.3≤x≤1.0)

“…The melts were rapidly poured onto a preheated stainless steel plate and pressed with another plate, yielding glass plates of 2-4 mm thickness. Finally, the glasses were immediately placed in a furnace at 500 • C for annealing to relieve the thermal stress [16,19]. The furnace was turned off 2 h later and the samples were cooled naturally in the furnace.…”

Controlled crystallization and ionic conductivity of a nanostructured LiAlGePO4 glass–ceramic

“…These ceramics are usually obtained by the classical powder sintering route and several compositions have been synthesized and studied [3][4][5][6][7][8][9]. Alternatively, Nasicon ceramics have been obtained successfully by other synthesis routes such as sol-gel [2,10] and glass-ceramic processes [11][12][13][14][15][16][17]. The latter, which do not require the sintering step, produce materials with homogeneous microstructures and low porosity.…”

“…The latter, which do not require the sintering step, produce materials with homogeneous microstructures and low porosity. Nevertheless, in the referenced studies, glass-ceramics were obtained by treating glasses at the crystallization peak temperature measured by differential scanning calorimetry (DSC) for periods as long as 12 h [12][13][14][15][16] or 24 h [11] without optimizing the heat treatment parameters and, hence, the resulting microstructures. Double heat treatments, i.e.…”