Crystallization kinetics of lithium–aluminum–germanium–phosphate glass doped with MgO using a non-isothermal method

Cha, Jihoon; Liu, Liyu; Lee, Hyunjoon; Jeong, Wonjong; Lim, Hyoun Soo; Ryu, Bong Ki

doi:10.1007/s43207-021-00137-1

Cited by 2 publications

(1 citation statement)

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“…The highest ionic conductivity was obtained when Mg 2+ was introduced at a ratio of 0.05; Mg0.05NZSP exhibited an ionic conductivity of 3.64 × 10 −3 S cm −1 , which was almost 80% higher than that of un-doped NZSP (2.03 × 10 −3 S cm −1 ) and one of the highest conductivities reported in previous studies (Table S1 in the ESM) [29,31,33,[40][41][42]. This can be attributed to a significant decrease in the grain boundary resistance: MgO, the raw material for the dopant, enhance the densification rate and promote grain growth by improving the surface diffusion coefficient [40,43,44]. There is no difference between the calcined NZSP and MgxNZSP powders (Fig.…”

Section: Journal Of Advanced Ceramicsmentioning

confidence: 71%

Improving ionic conductivity of von-Alpen-type NASICON ceramic electrolytes via magnesium doping

Jang¹,

Go²,

Song³

et al. 2023

Journal of Advanced Ceramics

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NASICON (sodium superionic conductor) compounds have attracted considerable attention as promising solid electrolyte materials for advanced sodium (Na)-based batteries. In this study, we investigated the improvement in ionic conductivities of von-Alpen-type NASICON (vA-NASICON) Journal of Advanced Ceramics https://mc03.manuscriptcentral.com/jacer 2 ceramic electrolyte by introducing magnesium (Mg 2+ ) as a heterogeneous element. The optimal Mgdoped vA-NASICON exhibited a high ionic conductivity of 3.64 × 10 −3 S cm −1 , that was almost 80% higher than that of un-doped vA-NASICON. The changes in the physicochemical properties of vA-NASICONs through Mg introduction were systematically analyzed, and their effects on the ionic conductivities of vA-NASICON were studied in detail. When the optimal ratio of Mg 2+ was used in the synthetic process, the relative density (96.6%) and grain boundary ion conductivity were maximized, which improved the total ionic conductivity of vA-NASICON. However, when Mg 2+ was introduced in excess, the ionic conductivity decreased because of the formation of an undesired NaxMgyPO4 secondary phase. The results of this study are expected to be effectively applied in the development of advanced sodium-based solid electrolytes with high ionic conductivities.

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