Study on Phase Transition of Molybdenum Trioxide and its Electrochemical Performance AITranslate

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Chinese Library Classification Number:TQ136.12[化学工程—无机化工]

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The effects of calcination temperature on MoO3 phase transition were investigated by XRD and SEM,and the electrochemical performance of MoO3 in different phases as tested. The results show that phase transition of molybdenum trioxide powders occurs during calcination at about 400℃, from hexagonal phase （h-MoO3） to orthorhombic phase （α-MoO3）, and powder morphology changes from short rods to small fragments. Used as the positive electrode active material of lithium battery,the initial maximum dis- charge specific capacity of h MoO3 is 171.4 mA·h/g and its capacity retention is 55.8% after 20 cycles. The initial maximum discharge specific capacity of α-MoO3 is 223.1 mA·h/g and its capacity retention is 60.6% after 20 cycles. Therefore,the electrochemical performance of α-MoO3 is much better than h-MoO3