Abstract
ABSTRACT Herein, we report an effective, fast and controllable electrochemical synthesis of layered structure LiNbO 2 by electrolysis of solid Nb 2 O 5 in molten LiF-LiCl salt. For the first time, the electrochemical performance of LiNbO 2 as an anode for lithium ion battery is investigated. Such a material shows a high reversible capacity of ∼190 mAh g −1 at 0.25C (1C = 200 mA g −1 ), superior rate capability (52 mA h g −1 at 80C) and excellent long-term cycle stability (75 mAh g −1 after 1000 cycles at 50C), due to the favorable kinetics benefiting from the high electronic conductivity and fast lithium diffusion in layered crystal structure of LiNbO 2 . It indicates that LiNbO 2 is a promising anode candidate. Moreover, this work may provide a facile and controllable way to synthesize electrode materials for lithium ion batteries and other electrochemical energy storage applications.
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