Preparation and characterization of hexagonal Li4GeO4-based glass-ceramic electrolytes

Yoneda, Yohei; Shigeno, Manari; Kimura, T.; Nagao, Kenji; Hotehama, Chie; Sakuda, Atsushi; Tatsumisago, Masahiro; Hayashi, Akitoshi

doi:10.1016/j.ssi.2021.115605

Cited by 9 publications

(17 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, the two exothermic peaks of DTA were attributed to the crystallization of each crystalline phase. 18) and the occupancy of each Li site in the hexagonal phase was used here. The refined cell parameters, R factors, and atomic coordinates are listed in Table 2.…”

Section: Methodsmentioning

confidence: 99%

“…and Li 4 GeO 4 Li 2 SO 4 glasses 18) increases with increasing the Li 2 SO 4 content. The relative density of the 60Li 4 GeO 4 • 40Li 2 SO 4 (mol %) glass cold-pressed at 720 MPa had a relatively high value of approximately 87 %.…”

Section: Introductionmentioning

confidence: 91%

“…Moreover, in the Li 4 GeO 4 Li 2 SO 4 system, a hexagonal phase with a P6 3 /mmc space group was crystallized as a metastable phase by heat-treating the glasses at 250°C. 18) The prepared glass-ceramics with the metastable phase demonstrated a lower activation energy and higher ionic conductivity of greater than 10 ¹6 S cm ¹1 compared to the glasses. 18), 19) In this study, Li 4 SiO 4 Li 2 SO 4 glasses and glass-ceramics were prepared by replacing Ge with Si.…”

Section: Introductionmentioning

confidence: 92%

“…18) The prepared glass-ceramics with the metastable phase demonstrated a lower activation energy and higher ionic conductivity of greater than 10 ¹6 S cm ¹1 compared to the glasses. 18), 19) In this study, Li 4 SiO 4 Li 2 SO 4 glasses and glass-ceramics were prepared by replacing Ge with Si. Silicon is abundant in the earth's crust, which contributes to the supply of inexpensive oxide electrolytes.…”

Section: Introductionmentioning

confidence: 92%

See 3 more Smart Citations

Glassy oxide electrolytes in the system Li4SiO4–Li2SO4 with excellent formability

Yoneda

Hotehama

Sakuda

et al. 2021

J. Ceram. Soc. Japan

Self Cite

View full text Add to dashboard Cite

All-solid-state batteries using oxide electrolytes are regarded as safe batteries. However, most crystalline oxide solid electrolytes require high-temperature sintering for densification. Oxide electrolytes with high formability, which enable the construction of high-performance batteries, are thus required. In this study, Li 4 SiO 4 Li 2 SO 4 glasses and glass-ceramics were prepared by mechanochemical treatment and subsequent heat treatment at 270°C to achieve electrolytes with high formability. As the Li 2 SO 4 content was increased, the formability of the electrolyte increased. The 90Li 4 SiO 4 •10Li 2 SO 4 glass-ceramic electrolyte with a hexagonal structure (a P6 3 /mmc space group) showed the highest ionic conductivity of 2.2 © 10 ¹6 S cm ¹1 at 25°C. In this crystal structure, oxygen anions form a hexagonal close-packed structure, and silicon and sulfur cations randomly occupy the tetrahedral sites formed by oxygen anions. An all-solid-state LiIn/LiNi 1/3 Mn 1/3 Co 1/3 O 2 cell using a 90Li 4 SiO 4 •10Li 2 SO 4 glass-ceramic electrolyte operated at 100°C as a secondary battery without high-temperature sintering. These oxide materials are promising solid electrolytes for oxide-type all-solid-state batteries.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 92%

See 2 more Smart Citations

Glassy oxide electrolytes in the system Li4SiO4–Li2SO4 with excellent formability

Yoneda

Hotehama

Sakuda

et al. 2021

J. Ceram. Soc. Japan

Self Cite

View full text Add to dashboard Cite

show abstract

“…Recently, the properties of Li 4 GeO 4 -based solid electrolytes have been reported. 10) Li 4 GeO 4 -based glassceramics have been synthesized at a relatively low temperature (³250°C) with the precipitation of a metastable hexagonal crystal phase in the P6 3 /mmc space group, which has a similar structure as Li 4 SnS 4 . 5) Additionally, the ionic conductivity and formability of Li 4 GeO 4 glassceramics can be improved by adding Li 2 SO 4 , which exhibits ionic conductivity of ³10 ¹6 S cm ¹1 at room temperature.…”

Section: Introductionmentioning

confidence: 99%

Ionic Conductivity and Microstructure of Li4GeO4-Based Solid Electrolytes

Ding¹,

Tsukasaki²,

Nakajima³

et al. 2022

Mater. Trans.

Self Cite

View full text Add to dashboard Cite

Li 4 GeO 4 -based solid electrolytes can be synthesized at low temperatures, and their formability is improved by adding Li 2 SO 4 . Glass ceramic Li 4 GeO 4 exhibits a relatively high ionic conductivity of approximately 10 ¹6 S cm ¹1 at room temperature, which is higher than that of glass Li 4 GeO 4 . Thus, Li 4 GeO 4 has promising applications in all-solid-state lithium ion batteries. To understand the correlation between the ionic conductivity, formability, and microstructure of the synthesized materials, the microstructures and crystallization process of glass and glassceramic Li 4 GeO 4 and 80Li 4 GeO 4 •20Li 2 SO 4 (Li 3.6 Ge 0.8 S 0.2 O 4 ) were observed by transmission electron microscopy (TEM). Since Li 3.6 Ge 0.8 S 0.2 O 4 glass exhibits a halo diffraction pattern, the addition of Li 2 SO 4 to Li 4 GeO 4 stabilizes its amorphous phase. In addition, glass ceramic samples were found to be characterized by an amorphous state containing nanocrystallites with a crystallinity degree of approximately 40%, which improves the ionic conductivity of the material.

show abstract

Potential electrolytes for solid state batteries and its electrochemical analysis—A review

Zulfiqar

Abbas

et al. 2023

Energy Storage

View full text Add to dashboard Cite

The main purpose of this review is to present comprehensive research on all solid‐state electrolytes in a single frame. In next‐generation rechargeable solid‐state batteries, the solid‐state electrolytes are well known for their thermal stability, ionic conduction, and electrochemical stability. Therefore, in scientific societies, the development of potential solid‐state electrolytes become a trending debate to enhance their cycling stability and electrochemical properties. Here, the recent development of all solid electrolytes (such as ceramic and structure‐based electrolytes) to enhance their electrochemical properties is summarized. From previous studies, the installation of solid electrolytes is hindered by the following factors electrode‐electrolyte interface, dendrite growth, and discharge capacity as well as its solutions are discussed. Additionally, advanced electrochemical characterization techniques such as electrochemical impedance spectroscopy, cyclic voltammetry, and galvanostatic charging and discharging used to evaluate the electrochemical behavior of electrolytes in the solid frame are summarized for the first time. Moreover, an up‐to‐date article on battery performance with potential electrolytes and some future perspectives also give a vivid image of the pragmatic applications of these batteries at the commercial level.

show abstract

Preparation and characterization of hexagonal Li4GeO4-based glass-ceramic electrolytes

Cited by 9 publications

References 24 publications

Glassy oxide electrolytes in the system Li<sub>4</sub>SiO<sub>4</sub>–Li<sub>2</sub>SO<sub>4</sub> with excellent formability

Glassy oxide electrolytes in the system Li<sub>4</sub>SiO<sub>4</sub>–Li<sub>2</sub>SO<sub>4</sub> with excellent formability

Ionic Conductivity and Microstructure of Li<sub>4</sub>GeO<sub>4</sub>-Based Solid Electrolytes

Potential electrolytes for solid state batteries and its electrochemical analysis—A review

Contact Info

Product

Resources

About