Structural and Li-ion diffusion properties of lithium tantalum phosphate LiTa2PO8

Norikazu Ishigaki; Kunimitsu Kataoka; Daisuke Morikawa; Masami Terauchi; Kikuko Hayamizu; Junji Akimoto

doi:10.1016/j.ssi.2020.115314

Structural and Li-ion diffusion properties of lithium tantalum phosphate LiTa₂PO₈

Norikazu Ishigaki, Kunimitsu Kataoka, Daisuke Morikawa, Masami Terauchi, Kikuko Hayamizu, Junji Akimoto

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

We synthesized a polycrystalline LiTa₂PO₈ sample at 1323 K by a solid-state reaction. The crystal structure of LiTa₂PO₈ was examined by selected-area electron diffraction (SAED) and convergent-beam electron diffraction (CBED) techniques. Electrochemical impedance measurements showed that the total conductivity at room temperature was 4.85 × 10⁻⁴ S cm⁻¹ and the activation energy was 0.52 eV. The high Li-ion conductive properties were confirmed by ⁷Li pulse-field gradient (PFG) or pulse-gradient spin-echo (PGSE) NMR spectroscopy. The activation energy of the Li diffusion (0.51 eV) measured by PFG NMR was well consistent with the result of impedance measurement. We believe that the LiTa₂PO₈ would be as one of the important candidates for the solid electrolyte used in all solid-state lithium batteries.

Original language	English
Article number	115314
Journal	Solid State Ionics
Volume	351
DOIs	https://doi.org/10.1016/j.ssi.2020.115314
Publication status	Published - 2020 Aug

Keywords

Convergent beam electron diffraction
Li PFG NMR
Lithium ion battery (LIB)
Lithium tantalum phosphate
Solid electrolyte

ASJC Scopus subject areas

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

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.ssi.2020.115314

Cite this

@article{c8a0abb5069a491e8cc6d4b4b3bfb5b8,

title = "Structural and Li-ion diffusion properties of lithium tantalum phosphate LiTa2PO8 ",

abstract = "We synthesized a polycrystalline LiTa2PO8 sample at 1323 K by a solid-state reaction. The crystal structure of LiTa2PO8 was examined by selected-area electron diffraction (SAED) and convergent-beam electron diffraction (CBED) techniques. Electrochemical impedance measurements showed that the total conductivity at room temperature was 4.85 × 10−4 S cm−1 and the activation energy was 0.52 eV. The high Li-ion conductive properties were confirmed by 7Li pulse-field gradient (PFG) or pulse-gradient spin-echo (PGSE) NMR spectroscopy. The activation energy of the Li diffusion (0.51 eV) measured by PFG NMR was well consistent with the result of impedance measurement. We believe that the LiTa2PO8 would be as one of the important candidates for the solid electrolyte used in all solid-state lithium batteries.",

keywords = "Convergent beam electron diffraction, Li PFG NMR, Lithium ion battery (LIB), Lithium tantalum phosphate, Solid electrolyte",

author = "Norikazu Ishigaki and Kunimitsu Kataoka and Daisuke Morikawa and Masami Terauchi and Kikuko Hayamizu and Junji Akimoto",

note = "Funding Information: A part of this work was supported by JST ALCA-SPRING Grant Number JPMJAL1301 , Japan. Publisher Copyright: {\textcopyright} 2020",

year = "2020",

month = aug,

doi = "10.1016/j.ssi.2020.115314",

language = "English",

volume = "351",

journal = "Solid State Ionics",

issn = "0167-2738",

publisher = "Elsevier",

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TY - JOUR

T1 - Structural and Li-ion diffusion properties of lithium tantalum phosphate LiTa2PO8

AU - Ishigaki, Norikazu

AU - Kataoka, Kunimitsu

AU - Morikawa, Daisuke

AU - Terauchi, Masami

AU - Hayamizu, Kikuko

AU - Akimoto, Junji

PY - 2020/8

Y1 - 2020/8

N2 - We synthesized a polycrystalline LiTa2PO8 sample at 1323 K by a solid-state reaction. The crystal structure of LiTa2PO8 was examined by selected-area electron diffraction (SAED) and convergent-beam electron diffraction (CBED) techniques. Electrochemical impedance measurements showed that the total conductivity at room temperature was 4.85 × 10−4 S cm−1 and the activation energy was 0.52 eV. The high Li-ion conductive properties were confirmed by 7Li pulse-field gradient (PFG) or pulse-gradient spin-echo (PGSE) NMR spectroscopy. The activation energy of the Li diffusion (0.51 eV) measured by PFG NMR was well consistent with the result of impedance measurement. We believe that the LiTa2PO8 would be as one of the important candidates for the solid electrolyte used in all solid-state lithium batteries.

AB - We synthesized a polycrystalline LiTa2PO8 sample at 1323 K by a solid-state reaction. The crystal structure of LiTa2PO8 was examined by selected-area electron diffraction (SAED) and convergent-beam electron diffraction (CBED) techniques. Electrochemical impedance measurements showed that the total conductivity at room temperature was 4.85 × 10−4 S cm−1 and the activation energy was 0.52 eV. The high Li-ion conductive properties were confirmed by 7Li pulse-field gradient (PFG) or pulse-gradient spin-echo (PGSE) NMR spectroscopy. The activation energy of the Li diffusion (0.51 eV) measured by PFG NMR was well consistent with the result of impedance measurement. We believe that the LiTa2PO8 would be as one of the important candidates for the solid electrolyte used in all solid-state lithium batteries.

KW - Convergent beam electron diffraction

KW - Li PFG NMR

KW - Lithium ion battery (LIB)

KW - Lithium tantalum phosphate

KW - Solid electrolyte

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