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Co3O4 powders with three different morphologies are synthesized via ultrasonic spray pyrolysis. Distinct impact of precursor types on the morphology, microstructure, and electrochemical properties of the Co3O4 powders are systematically studied. SEM and TEM observations show that the Co3O4 powders prepared from Co(CH3COO)2, CoCl2, and Co(NO3)2 exhibit dried plum-like, porous, and durian-like microsphere...
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