Figure 4: Electrochemical performance of the MXene-OMC.

(a) CV curves of the Ti3C2Tx-OMC, Ti3C2Tx/OMC, Ti3C2Tx and OMC at a scan rate of 5 mV s−1. (b) Gravimetric capacitances versus different current densities and (c) volumetric capacitances versus different current densities for the Ti3C2Tx-OMC, Ti3C2Tx/OMC, Ti3C2Tx and OMC. (d) Nyquist plots of the Ti3C2Tx-OMC and Ti3C2Tx with the close-up view on the high-frequency regime. The reference electrode is a saturated calomel electrode (SCE).