Synthesis and Electrochemical Behaviour of Ramsdellite LiCrTiO4


A ramsdellite with composition LiCrTiO4 has been obtained by heating the spinel of same composition to high temperature. The new ramsdellite has been investigated in view of its possible use as an electrode material in lithium rechargeable batteries. Lithium can be partially extracted from ramsdellite LiCrTiO4 and further intercalated into, by contrast to the spinel of same composition. The average operating voltage during lithium extraction is 4 Volts vs. lithium, and the process produces a specific capacity of 90 mAh/g at 0.1 mA/cm2. On the other hand, upon reduction from open circuit voltage, lithium can be reversibly intercalated into the ramsdellite polymorph at ca. 1.5 V vs. lithium yielding a rechargeable capacity of 110 mAh/g at 0.1 mA/cm2.

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García-Alvarado, F., Martín-Gil, M. & Kuhn, A. Synthesis and Electrochemical Behaviour of Ramsdellite LiCrTiO4. MRS Online Proceedings Library 756, 79 (2002).

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