Figure 7From: Hydrothermal synthesis of MnO2/CNT nanocomposite with a CNT core/porous MnO2 sheath hierarchy architecture for supercapacitorsNyquist plots and frequency dependence of capacitance retention of the electrodoes. (a) Nyquist plots and (b) frequency dependence of capacitance retention of the CNT, pure MnO2, and MnO2/CNT nanocomposite electrodes.Back to article page