Abstract. La-doped MnO 2 nanoparticles were synthesized by a facile sol-gel method.Using XRD and SEM to analyze the structure and morphology of the obtained nano-MnO 2 , the results show that it exhibit α-MnO 2 crystal form with some amorphous structure and irregular granular morphology with size of 150-300 nm. Through electrochemical tests of CV and GCD, La-doped nano-MnO 2 presents enhanced electrochemical capacitance with a specific capacitance of 168.7 F g -1 , much higher than that of pure nano-MnO 2 prepared at the same conditions.