We would like to introduce diatom as a novel substrate of electrode material for supercapacitor,which is actually the amorphous silica exoskeletons(frustules) of the single-celled algae and known as a common building material.Considering the high porosity,low bulk density,stable chemical property,and large specific area of diatom,we[1] reported MnO2 decorated diatom used as electrochemistry capacitor electrodes performing a high specific capacitance(202.6Fg-1) with excellent stability(95.92％ remained after 5000 cycles).