An anode material with Perovskite structure for rechargeable Li-ion batteries

Ecole Polytechnique de Montreal
Publication Type:
Journal Article
Journal of New Materials for Electrochemical Systems, 2000, 3 (1), pp. 9 - 12
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A conductive ceramic, barium metaplumbate (BaPbO3), has been synthesized by solid-state reactions for use as an anode in lithium-ion batteries. The electrochemical characteristics of the electrode were tested in ethylene and diethyl carbonate (EC-DEC) solutions of LiPF6 versus Li metal in rest cells. During cycling, the material showed voltage plateaus between 0.2 V and 0.6 V versus Li, demonstrated a gravimetric discharge capacity of about 110 mAh g(-1) and a volumetric capacity of 960 mAh cm(-3). Two phases, BaPbO3 and PbO, were found in compositions containing excess PbO. The free PbO in the fired bodies was found in the experiment to react with the lithium and form a new compound probably a Pb-Li alloy, which was unstable and brought an intensive capacity fading. A single phase, BaPbO3, which was obtained by increasing the calcining temperature and the partial pressure of O-2 in the ambient air presented an improved capacity and a stable pervoskite structure. The results from cyclic voltammograms suggest that the insertion and de-insertion of Li ions proceed in the voltage range from 0.01 to 1.2 V versus Li/ Li+.
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