Quasi-solid-state lithium batteries using bulk-size transparent Li7La3Zr2O12 electrolytes

Shoichi Sugata, Noriko Saito, Akio Watanabe, Ken Watanabe, Je Deok Kim, Kan Kitagawa, Yosuke Suzuki, Itaru Honma

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A thick bulk-sized Li7La3Zr2O12 (LLZ) solid electrolyte is successfully prepared using a polymer complex method and a hot isostatic pressing (HIP) treatment. Despite the difficulties of densification, HIP-treated LLZ can be prepared as a transparent ceramic pellet because of its ~200 μm primary grain size, and its conductivity is improved by its increased density (>99%). An all-solid-state lithium battery is fabricated by using a mixed conducting ionic liquid gel to connect the bulk-sized LLZ electrolyte and a LiFePO4 (LFP) cathode. The introduction of the mixed conducting gel layer reduces the electrode/electrolyte interface resistance. The specific discharge capacity of the active cathode material is 169 mAh g−1 (current density of 0.046 mA cm−2), which suggests that almost the full capacity of LFP can be utilized even under the all-solid-state cell design. The coulombic efficiency (ηc) is ≈1, and no side reactions are observed. The LFP/LLZ/Li cell shows a high electrochemical stability against the Li metal anode, and the cell operates for 20 cycles without dendrite growth causing a short circuit under a charge current density of 0.591 mA cm−2 (1/2 C rate).

Original languageEnglish
Pages (from-to)285-290
Number of pages6
JournalSolid State Ionics
Volume319
DOIs
Publication statusPublished - Jun 1 2018
Externally publishedYes

Fingerprint

Lithium batteries
Hot isostatic pressing
lithium batteries
Electrolytes
hot isostatic pressing
Cathodes
Current density
Gels
electrolytes
solid state
Solid electrolytes
cathodes
cells
Densification
Ionic liquids
gels
Short circuit currents
current density
conduction
Ionic Liquids

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Quasi-solid-state lithium batteries using bulk-size transparent Li7La3Zr2O12 electrolytes. / Sugata, Shoichi; Saito, Noriko; Watanabe, Akio; Watanabe, Ken; Kim, Je Deok; Kitagawa, Kan; Suzuki, Yosuke; Honma, Itaru.

In: Solid State Ionics, Vol. 319, 01.06.2018, p. 285-290.

Research output: Contribution to journalArticle

Sugata, S, Saito, N, Watanabe, A, Watanabe, K, Kim, JD, Kitagawa, K, Suzuki, Y & Honma, I 2018, 'Quasi-solid-state lithium batteries using bulk-size transparent Li7La3Zr2O12 electrolytes', Solid State Ionics, vol. 319, pp. 285-290. https://doi.org/10.1016/j.ssi.2018.02.029
Sugata, Shoichi ; Saito, Noriko ; Watanabe, Akio ; Watanabe, Ken ; Kim, Je Deok ; Kitagawa, Kan ; Suzuki, Yosuke ; Honma, Itaru. / Quasi-solid-state lithium batteries using bulk-size transparent Li7La3Zr2O12 electrolytes. In: Solid State Ionics. 2018 ; Vol. 319. pp. 285-290.
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