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

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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 LiPF6versus Li metal in test 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-1and a volumetric capacity of 960 mAh cm-3. Two phases, BaPbO3and 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 O2in the ambient air, presented an unproved 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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