α-MoO_3/CRF复合电极的制备及其在超级电容器中的应用

Preparation of α-MoO_3/CRF composite electrodes for application of supercapacitor

以(NH4)6Mo7O24.4H2O和HAc为原料,制备了超级电容器电极活性材料-αMoO3粉末,并以间苯二酚(R)和甲醛(F)为原料,碳酸钠(C)为催化剂,制备了炭气凝胶(CRF)。用X射线衍射仪和扫描电镜对-αMoO3和CRF进行了表征。研究了不同配比的-αMoO3和炭气凝胶组成的-αMoO3/CRF复合电极的电化学性能。循环伏安、恒流充放电实验显示了所制备的炭气凝胶以及-αMoO3/CRF复合电极材料具有良好的电化学性能。炭气凝胶电极的比容量为110.8 F/g,而当-αMoO3含量在10%时,-αMoO3与炭气凝胶复合制成的新型电极材料的比容量为279.8 F/g,且所制备成的电容器的比电容可达47.6 F/g。

α-MoO3 powders for the application of supercapacitor active material was prepared by using （NH4）6Mo7O24·4H2O and HAc as raw materials. Carbon aerogel was prepared by the polycondensation of resorcinol （R） with formaldehyde （F）, and sodium carbonate was added as a catalyst （C）. The physical properties of α-MoO3 and carbon aerogel were characterized by X-ray diffractrometry （XRD） and scanning electron microscopy （SEM）. The electrochemical performances of α-MoO3/CRF composite electrodes with different ratios were studied. The good electrochemical performances of carbon aerogel electrode and α-MoO3/CRF composite electrodes were comfirmed by cyclic voltammetry and galvanostatic charge/discharge measurement. The results indicate that the specific capacitance of carbon aerogel electrode is approximately 110.8 F/g. However, when the loading quantity of MoO3 is 10%, the specific capacitance of α-MoO3/CRF can reach 279.8 F/g, and the specific capacitance of the supercapacitor is 47.6 F/g.