Very recently, Yucel et al. demonstrated the P-doped graphene prepared by electrochemical exfoliation for energy storage applications . They prepared the P-doped graphene by the electrochemical exfoliation of pencil graphite electrodes with various applied potential ranges using 5 M H3PO4 solution. Among the three different applied potentials used for the electrochemical exfoliation, the P-doped graphene obtained at +1 to +2.1 V got the 6.45 at. % of phosphorus and accomplished the areal capacitance of 301.3 mF cm -2 at 10 mA cm -2 in 1 M H2SO4 solution which is higher compared to 1 M H3PO4 solution (110.9). Furthermore, the interesting feature of this report is that the functional groups such as -P,-[(-P2O7)] 4-, and -(PO3 -