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Morphology design of nanostructured electrode materials is crucial for pseudocapacitors to boost electrochemical performance.To date,many kinds of techniques have been developed to synthesize materials in various dimensions and structures,whereas seldom achievements have been made in fabrication of MoO2 in nanoscale,rendering MoO2 scarcely explored as pseudocapacitive materials.Through the rational control of oriented growth and self-assembly simultaneously,herein we constructed novel MoO2 nano pearl chains(NPCs)and achieved a significant improvement on the electrochemical performance.This novel MoO2 NPCs deliver a high specfic capacitance of 1190 F g-1 at the current density of 1 A g-1 and outstanding rate performance from 1 to 50 A g-1 with 66%capacitance retention,which demonstrated both high charge storage capability and power density.Further electrochemical analyses show the distinct diffusion-controlled kinetics,suggesting the redox reaction happpens both on the interface and within the bulk,which is accordant to the one dimensional open tunnel structure of MoO2.This work offers an facile synthesis and rational design to obtain composite nanostructure for single material and exhibits a promising application of MoO2 in supercapacitor field.