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Hexagonal-MoO 3 /polypyrrole conductive hybrid is facilely prepared by wrapping a homogenous polypyrrole (PPy) layer around hexagonal-MoO 3 ( h -MoO 3 ) prism via in-situ oxidative polymerization of self-assembled pyrrole monomer. The electrochemical performance of the obtained h -MoO 3 /PPy hybrid in different electrolytes is investigated. The cyclic voltammogram results at different scan rates show that the rate behaviors of h -MoO 3 /PPy in the three electrolytes improve in the order of Li 2 SO 4 < Na 2 SO 4 < K 2 SO 4 . The EIS measurement indicates that the h -MoO 3 /PPy hybrid in K 2 SO 4 electrolyte exhibits lower charge-transfer resistance and equivalent series resistance, which attributes to the small hydrated ionic radius and fast transfer rate of K + . Furthermore, the cycling stability of the h -MoO 3 /PPy hybrid also increase in the sequence of Li 2 SO 4 < Na 2 SO 4 < K 2 SO 4 . The above results provide valuable supporting information to explore new hybrid supercapacitor system. [ABSTRACT FROM AUTHOR]