fig5

Figure 5. (A) Fabrication and (B) first-principle calculations of Au-doped MnO₂. Differential charge densities of (left) Au-substituted and (right) Au-interstitial MnO₂. Green indicates a loss of electrons and pink represents a gain of electrons. (C) specific capacitance of Au/MnO₂ at different Au sputtering times. (D) cycling stability of pure MnO₂ and Au-doped MnO₂ electrodes with the same thickness of ~1.35 μm. Reproduced with permission^[97]. Copyright 2013, Wiley-VCH. (E) fabrication of amorphous MnO₂@MWCNT fibers. (F) C_V of amorphous MnO₂@MWCNT fiber electrode. (G) cycling and bending stability of fiber SC at 1 A cm^-3. Reproduced with permission^[100]. Copyright 2017, American Chemical Society.