Abstract

Nanosized powders have been synthesized via a reverse-microemulsion process. Monophasic with a structure is successfully synthesized after calcining the dried powders at for . A specific model is established for estimating the occupancy of all atoms and the degree of cationic ordering in the -structural compound. Prolonging the calcination time considerably increases the degree of cationic ordering and the cycleability. The electrochemical characteristics of the powders are markedly influenced by particle size. The discharge capacities of increase significantly with a decrease in the calcined powder size. The improvement in the electrochemical properties of is ascribed to the enhanced crystallinity as well as the nanosize of the microemulsion-derived powders.

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