Microstructural evolution of solution-processed Li-Ge-Ga-S chalcogenide powders for Li+ ion battery applications

Yun Gu Cho, Sang Yeol Shin, Jun Ho Lee, Junghoon Kim, Woon Jin Chung, Dong Wook Shin, Yong Gyu Choi

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Sulfur-based chalcogenide Li-Ge-Ga-S powders for use in solid electrolyte of Li+ ion batteries have been successfully synthesized via a low-temperature solution-based process. Their Li+ ion conductivity turns out to be ~ 7 × 10- 4 S/cm at room temperature which is quite comparable with that of melt-quenched or mechanically-alloyed analogues. It is revealed that their microstructure becomes amorphized appropriately at a specific Ga/Ge ratio where the ionic conductivity is maximized. A structural model is proposed, which emphasizes correlations between gallium and lithium inside the amorphous structures.

Original languageEnglish
Pages (from-to)57-60
Number of pages4
JournalJournal of Non-Crystalline Solids
Volume431
DOIs
StatePublished - 2016 Jan 1

Fingerprint

Microstructural evolution
Powders
electric batteries
Gallium
Solid electrolytes
solid electrolytes
Ionic conductivity
Lithium
Sulfur
ion currents
gallium
ions
sulfur
lithium
Ions
analogs
conductivity
Temperature
microstructure
Microstructure

Keywords

  • Amorphous chalcogenide
  • Li ion battery
  • Solid electrolyte
  • Solution process

Cite this

Cho, Yun Gu ; Shin, Sang Yeol ; Lee, Jun Ho ; Kim, Junghoon ; Chung, Woon Jin ; Shin, Dong Wook ; Choi, Yong Gyu. / Microstructural evolution of solution-processed Li-Ge-Ga-S chalcogenide powders for Li+ ion battery applications. In: Journal of Non-Crystalline Solids. 2016 ; Vol. 431. pp. 57-60.
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Microstructural evolution of solution-processed Li-Ge-Ga-S chalcogenide powders for Li+ ion battery applications. / Cho, Yun Gu; Shin, Sang Yeol; Lee, Jun Ho; Kim, Junghoon; Chung, Woon Jin; Shin, Dong Wook; Choi, Yong Gyu.

In: Journal of Non-Crystalline Solids, Vol. 431, 01.01.2016, p. 57-60.

Research output: Contribution to journalArticle

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AU - Cho, Yun Gu

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AU - Shin, Dong Wook

AU - Choi, Yong Gyu

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AB - Sulfur-based chalcogenide Li-Ge-Ga-S powders for use in solid electrolyte of Li+ ion batteries have been successfully synthesized via a low-temperature solution-based process. Their Li+ ion conductivity turns out to be ~ 7 × 10- 4 S/cm at room temperature which is quite comparable with that of melt-quenched or mechanically-alloyed analogues. It is revealed that their microstructure becomes amorphized appropriately at a specific Ga/Ge ratio where the ionic conductivity is maximized. A structural model is proposed, which emphasizes correlations between gallium and lithium inside the amorphous structures.

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