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Issue 3, 1999
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New lithium-ion conductors based on the NASICON structure

Abstract

Lithium-ion conduction in mixed-metal phosphates, LiMVM III (PO 4 ) 3 [MV=Nb, Ta; M III =Al, Cr, Fe], possessing the rhombohedral (R[3 with combining macron]c) NASICON structure has been investigated. Among the phosphates investigated, LiTaAl(PO 4 ) 3 exhibits the highest conductivity, σ≈1.0×10 –2 S cm –1 at 350 °C (E a =0.47 eV), comparable to the conductivity of LiTi 2 (PO 4 ) 3 . Unlike LiTi 2 (PO 4 ) 3 which contains lithium-reducible Ti IV , LiTaAl(PO 4 ) 3 contains stable TaV and Al III oxidation states and hence deserves further attention towards tailoring new lithium-ion conductors for application as electrolytes in solid state lithium batteries.

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Article type: Paper
DOI: 10.1039/A807007E
Citation: J. Mater. Chem., 1999,9, 739-741
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    New lithium-ion conductors based on the NASICON structure

    V. Thangadurai, A. K. Shukla and J. Gopalakrishnan, J. Mater. Chem., 1999, 9, 739
    DOI: 10.1039/A807007E

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