Fabrication of high-surface-area, SiO₂ supported polyimide carbon aerogel microspheres: electrochemical application

Abstract A series of polyimide (PI)/SiO 2 aerogel microspheres were prepared by using polyamide acid salt and hydrolyzed tetraethyl orthosilicate based on the reverse-phase emulsion method. Then, PI/SiO carbonized etched to obtain carbon (CAMs). Scanning electron microscope, transmission microscope nitrogen isothermal adsorption used characterize micro-morphology pore structure microspheres; electrochemical workstation was test performance CAMs. The results showed that CAMs with different structures specific surface area obtained adjusting content SiO . Highest 1166.9 m g −1 a total volume 1.2369 cm 3 achieved at 50%. When as electrode materials for supercapacitors, these demonstrated maximum capacitance 125.1 F in three-electrode system 53.3% 30 This article provides new strategy preparation high linear PI precursor support skeleton.