Ionic conductivity of rapidly quenched glasses with high concentration of lithium ions

Electrochemical behavior of Ge and GeX2 (X = O, S) glasses: Improved reversibility of the reaction of Li with Ge in a sulfide medium

“…These glasses are formed by a network glass former such as SiO 2 , B 2 O 3 , or P 2 O 5 and a network modifier, Li 2 O, to form oxide glasses such as Li 2 O + SiO 2 [14,15], Li 2 O + B 2 O 3 [15,16], and Li 2 O + P 2 O 5 [17,18] and by network former such as SiS 2 , GeS 2 , P 2 S 5 , or B 2 S 3 and a network modifier, Li 2 S, to form sulfide glasses such as Li 2 S + P 2 S 5 [19], Li 2 S + GeS 2 [18,20], Li 2 S + SiS 2 [21], and Li 2 S + B 2 S 3 [22]. As predicted by the Anderson-Stuart model [23] and the weak electrolyte theory [24] the substitution of sulfur for oxygen greatly reduces the bond energy between the lithium cation and sulfur anion and as a result of the greater polarizability of the sulfur the activation energy is thus reduced as shown in Fig.…”

Electrical conductivity and relaxation frequency of lithium borosilicate glasses

“…Although the lithium borosilicate glasses are mentioned as an example of mixed former effect [1], increased electrical conductivity in this system has been observed only in rapidly quenched glasses with concentrations of lithium oxide >60 mol% [11]. Nevertheless, glasses containing smaller concentrations of Li 2 O were investigated by Otto [12].…”

Fabrication of a high lithium ion conducting lithium borosilicate glass

“…On the other hand, silica-based Li ion conducting glasses such as lithium aluminosilicates [10], lithium borosilicates [11], lithium phosphosilicates [12] and so on, have been systematically studied, due to their excellent chemical and thermal stability. In fact, the Li ion conductivity of lithium silicate glasses is in the range of 10 − 7 to 10 − 8 S cm − 1 at room temperature.…”

“…In fact, the Li ion conductivity of lithium silicate glasses is in the range of 10 − 7 to 10 − 8 S cm − 1 at room temperature. In addition, special techniques, for example, rapid quenching using twin roller are needed to fabricate the glass with high concentration of lithium ion [12]. In this study, lithium borosilicate (Li 2 O-B 2 O 3 -SiO 2 ) glasses with 35 to 50 mol% of Li 2 O were fabricated by the melt quenching method.…”