Figure 5.

Electrochemical measurements in 0.1 M Na₂SO₄ solution. (a) CV curves of Mn₃O₄/rGO at various scan rates; (b) specific capacitance of the as-prepared Mn₃O₄/rGO material at various scan rates; (c) galvanostatic charge–discharge curves of Mn₃O₄/rGO at various current densities; (d) cycle performance measured over 10,000 cycles at a 10 A g⁻¹.