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Abstract: CuV2O6 is a very promising cathode material for rechargeable lithium batteries. By a soft chemistry method, CuV2O6 is successfully synthesized from V2O5 hydrogel and Cu2O powder. CuV2O6 with different degrees of crystallinity are obtained by heating CuV2O6 precursor at various temperatures. XRD, TG–DTA, TEM and SEM experiments are conducted to characterize its physical properties, and the electrochemical properties have been investigated by galvanostatic charge–discharge experiments. As a result, CuV2O6 annealed at 550°C has smaller crystal lattice constants and better electrochemical properties compared to the sample synthesized by the conventional solid-state method. [Copyright &y& Elsevier]

A new low-temperature synthesis route of Li1.2V3O8 for use as cathode active material in lithium secondary batteries from V2O5 gel is proposed. Reacting V2O5 gel with stoichiometrical LiOH·H2O under mild stirring forms Li1.2V3O8 gel. By heating Li1.2V3O8 gel at various temperatures in air, Li1.2V3O8 with different degrees of crystallinity have been obtained. TEM, TG–DTA and XRD experiments were carried out for physical characterization and the galvanostatic charge–discharge experiments for checking their electrochemical performance. The low-temperature sol–gel products have lower crystallinity and higher specific capacity than those synthesized by high temperature solid-state method. [Copyright &y& Elsevier]

Abstract: Ag2V4O11 powder, a very important cathode material for lithium battery, has been prepared via a rheological phase method using Ag2CO3 and NH4VO3. This method provides a superiority of processing conditions over the conventional solid-state reaction. The size of so-prepared crystallites is distributed in a narrow range. The results of electrochemical studies show that the material prepared by the rheological phase method displays a higher discharge capacity and higher-rate capability compared to the conventional solid-state method. [Copyright &y& Elsevier]