Li+ conduction in air-stable Sb-Substituted Li4SnS4 for all-solid-state Li-Ion batteries

Hiram Kwak, Kern Ho Park, Daseul Han, Kyung Wan Nam, Hyungsub Kim, Yoon Seok Jung

Research output: Contribution to journalArticle

Abstract

Development of new sulfide Li+ superionic conductors with mechanical sinterability is the key to the success of all-solid-state lithium batteries. While phosphorus-containing sulfide superionic conductor materials have been widely investigated, phosphorus-free materials showing good air-stability have been overlooked. Herein, the Li+ dynamics in Sb-substituted Li4SnS4 showing a high Li+ conductivity of max. 0.85 mS cm−1 at 30 °C and excellent dry-air stability as well as negligible H2S evolution is described. Structural analysis with X-ray and neutron diffraction reveals that Sb-substitution renders an expansion of the lattice volume and formation of Li vacancies. Additionally, 1D-preferable 3D Li+ diffusion channels in Li4-xSn1-xSbxS4 are disclosed. The fast Li+ diffusion in Li4-xSn1-xSbxS4 is rationalized by complementary analysis using AC impedance measurements, bond valence energy landscape calculation, and 7Li nuclear magnetic resonance spectroscopy. Excellent electrochemical performances of TiS2 electrodes employing Li3.85Sn0.85Sb0.15S4 in all-solid-state batteries are demonstrated.

Original languageEnglish
Article number227338
JournalJournal of Power Sources
Volume446
DOIs
StatePublished - 2020 Jan 15

Fingerprint

Sulfides
Phosphorus
electric batteries
phosphorus
sulfides
conductors
solid state
conduction
Lithium batteries
lithium batteries
air
impedance measurement
magnetic resonance spectroscopy
Neutron diffraction
Air
structural analysis
Structural analysis
Crystal lattices
Nuclear magnetic resonance spectroscopy
Vacancies

Keywords

  • All-solid-state batteries
  • Ionic conductivities
  • Neutron diffraction
  • Solid electrolytes
  • Sulfides

Cite this

Kwak, Hiram ; Park, Kern Ho ; Han, Daseul ; Nam, Kyung Wan ; Kim, Hyungsub ; Jung, Yoon Seok. / Li+ conduction in air-stable Sb-Substituted Li4SnS4 for all-solid-state Li-Ion batteries. In: Journal of Power Sources. 2020 ; Vol. 446.
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abstract = "Development of new sulfide Li+ superionic conductors with mechanical sinterability is the key to the success of all-solid-state lithium batteries. While phosphorus-containing sulfide superionic conductor materials have been widely investigated, phosphorus-free materials showing good air-stability have been overlooked. Herein, the Li+ dynamics in Sb-substituted Li4SnS4 showing a high Li+ conductivity of max. 0.85 mS cm−1 at 30 °C and excellent dry-air stability as well as negligible H2S evolution is described. Structural analysis with X-ray and neutron diffraction reveals that Sb-substitution renders an expansion of the lattice volume and formation of Li vacancies. Additionally, 1D-preferable 3D Li+ diffusion channels in Li4-xSn1-xSbxS4 are disclosed. The fast Li+ diffusion in Li4-xSn1-xSbxS4 is rationalized by complementary analysis using AC impedance measurements, bond valence energy landscape calculation, and 7Li nuclear magnetic resonance spectroscopy. Excellent electrochemical performances of TiS2 electrodes employing Li3.85Sn0.85Sb0.15S4 in all-solid-state batteries are demonstrated.",
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Li+ conduction in air-stable Sb-Substituted Li4SnS4 for all-solid-state Li-Ion batteries. / Kwak, Hiram; Park, Kern Ho; Han, Daseul; Nam, Kyung Wan; Kim, Hyungsub; Jung, Yoon Seok.

In: Journal of Power Sources, Vol. 446, 227338, 15.01.2020.

Research output: Contribution to journalArticle

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T1 - Li+ conduction in air-stable Sb-Substituted Li4SnS4 for all-solid-state Li-Ion batteries

AU - Kwak, Hiram

AU - Park, Kern Ho

AU - Han, Daseul

AU - Nam, Kyung Wan

AU - Kim, Hyungsub

AU - Jung, Yoon Seok

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