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LiTa2PO8: a fast lithium-ion conductor with new framework structure

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Abstract

A new lithium-ion conducting oxide, LiTa2PO8, with a three-dimensional (3D) framework structure was synthesized. The complementary use of synchrotron XRD and neutron diffraction revealed that LiTa2PO8 crystallized into a monoclinic system (space group C2/c) with lattice parameters a ≈ 9.716 Å, b ≈ 11.536 Å, c ≈ 10.697 Å, and β = 90.04°. In this structure, the TaO6 octahedra and PO4 tetrahedra are connected via corner-sharing to form an unprecedented anionic framework, [(TaO6/2)2(PO4/2)], providing a 3D pathway for lithium-ion conduction. The sintered LiTa2PO8 pellets exhibited excellent lithium-ion conductivities: bulk conductivity of 1.6 × 10−3 S cm−1 and total conductivity of 2.5 × 10−4 S cm−1 at 25 °C.

Graphical abstract: LiTa2PO8: a fast lithium-ion conductor with new framework structure

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Publication details

The article was received on 20 Sep 2018, accepted on 28 Oct 2018 and first published on 29 Oct 2018


Article type: Communication
DOI: 10.1039/C8TA09170F
Citation: J. Mater. Chem. A, 2018, Advance Article
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    LiTa2PO8: a fast lithium-ion conductor with new framework structure

    J. Kim, J. Kim, M. Avdeev, H. Yun and S. Kim, J. Mater. Chem. A, 2018, Advance Article , DOI: 10.1039/C8TA09170F

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