Mn_2O_3/CRF复合材料的制备及其在超级电容器中的应用

通过采用沉淀法在碳气凝胶表面负载金属氧化物三氧化二锰,制备得到Mn_2O_3/CRF复合材料。采用X射线衍射及电镜扫描等技术对所制备的复合材料进行结构形貌表征。实验结果发现碳气凝胶具有多重片层结构且孔隙发达。通过调节锰盐的含量考察三氧化二锰负载量对复合材料电化学性能的影响作用。采用循环伏安法及充放电测试对材料的电化学性能进行测试,结果表明Mn_2O_3/CRF复合材料具有良好的电容性及较好的可逆性。当Mn_2O_3含量达15%时复合材料的比电容最大,可达118.5 F/g。通过充放电测试1000次后发现该电极的比电容依然能够保持在一稳定值上,具有较好的稳定性。

STUDY ON THE PREPARATION AND PERFORMANCE OF Mn2O3/CRF COMPOSITE ELECTRODES FOR THE APPLICATION OF SUPERCAPACITOR

Mn₂O₃/carbon aerogel (CRF) composite electrode materials were prepared by a precipitation method. The structure and morphology of Mn₂O₃/CRF were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results showed that carbon aerogel had multiplicity of lamellar structure. Electrochemical performance of the composite electrodes with different loading amount of Mn₂O₃ was studied by cyclic voltammetry and galvanostatic charge/discharge measurements. The results indicated the composite electrodes had good electrochemical performance, high reversibility and high charge-discharge properties. Moreover, when the loading amount of Mn₂O₃ was 15%, the composite material has a high specific capacitance of 118.5 F/g. Besides, the composite supercapacitors showed a stable cycle life in the potential range of 0~0.8 V over 1000 cycles.