Add time:07/27/2019         Source:sciencedirect.com

NIOBIUM TELLURIDE (cas 12034-83-2) thin films were evaluated as intercalation electrodes in lithium cells. The films were prepared on Al substrate by sputter deposition under different experimental conditions. Large deposition periods lead to a non-crystalline film material, while short deposition periods allow the formation of layered particles structurally similar to niobium ditelluride. For preparations carried out at 300°C, the particles have sizes of ca 1 μm with their 001 planes oriented parallel to the substrate. At 330°C, particles of ca 10 μm with their 001 axis parallel to the substrate are obtained. Test batteries of the type Li/LiClO4(PC)/niobium telluride film were studied by potentiostatic and galvanostatic procedures. The performance of the batteries is influenced by the preparation conditions. Cell capacities larger than 100 mA h g−1 and a good capacity retention after 50 cycles were observed for films prepared at 300°C when the cells were cycled between 0.5 and 2.0 V.

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