In order to obtain materials for electrochemical capacitors with excellent capacitance performances

we adopted the sol-gel process to prepare strontium bismuth oxide（SBO） nanomaterials

and successfully synthesized an SBO/MWCNT composite used as electrode by a hydrothermal method. Moreover

X-ray diffraction（XRD）

scanning electron microscopy（SEM）

X-ray photoelectron spectroscopy（XPS）

Fourier transform infrared spectroscopy（FT-IR）

and electrochemical measurements were performed to investigate the morphology

structure and supercapacitive performance of the composite. The results showed that the SBO/MWCNT electrode presented a specific capacitance of 516.8 F/g at a current density of 1 A/g in a 6 mol/L KOH aqueous solution. This value was much higher than that of SBO electrodes（446.5 F/g） and MWCNT electrodes（12.0 F/g）. If the current density increased to 5 A/g

the specific capacitance of SBO/MWCNT electrode would remain as high as 446.4 F/g. EIS results indicated that the electrode also had a good frequency response. These results show that SBO/MWCNT is a promising composite electrode material with great application for energy storage and conversion devices.