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A new form of LiNbO<inf>3</inf> with a lamellar structure showing reversible lithium intercalation
Date Issued
12-04-2011
Author(s)
Pralong, V.
Reddy, M. Anji
Caignaert, V.
Malo, S.
Lebedev, O. I.
Indian Institute of Technology, Madras
Raveau, B.
Abstract
The exchange of lithium for univalent copper in CuNbO3 has been investigated. A new form of LiNbO3 with a lamellar structure has been synthesized from the topotactic reaction between CuNbO3 and a molten salt corresponding to the eutectic "LiCl/LiNO3". This compound crystallizes in the P21/a space group with a = 9.433 Å, b = 8.226 Å, c = 6.213 Å, and β = 90.2°. This new phase intercalates one lithium on the first discharge and shows reversibility of 0.7 lithium through a first-order transformation leading to a capacity of 120 mAh/g at a potential of 1.65 V vs Li+/Li. © 2011 American Chemical Society.
Volume
23