To deliver the device with high energy density using heteroatom co-doped graphene that was synthesised using CVD technique, our group previously demonstrated the fabrication of the B, N co-doped graphene by hydrothermal in teflon lined auto clave at 180 °C for 18 h accompanied by the thermal heat treatment in CVD reactor at 1000 °C for 2 h in Ar atmosphere with different mass loadings of dopants (boric acid and urea) and . The prepared material which has attained the maximum specific capacitance of 325.5 F g -1 at 1 A g -1 contained the contents of boron and nitrogen of 3.94 and 10.81 at. %, respectively. The superior cycling stability of 102% retention of the capacitance after 10000 cycles in 1 M H2SO4 electrolyte was also observed. A flexible symmetric solid-state supercapacitor (SSC) was fabricated that secured a high energy density of 64.75 W h kg -1 at a power density of 900 W kg -1 at 1 A g -1 . Similarly, an asymmetric solid-state supercapacitor (ASSC) in which the B, N co-doped graphene as the positive and the reduced graphene oxide as the negative electrode was fabricated that delivers a high energy density of 55.8 W h kg -1 at a power density of 900 W kg -1 in H2SO4/PVA solid-gel electrolyte. The assembled ASSC in series connection made a DC motor to rotate fan about 45 seconds upon charging at 3.5 V and shown in Fig. . The SSC exhibits the extraordinary as well as outstanding electrochemical stability with 104.7% capacitance retention while the ASSC reveals 99.7% retention after 10000 cycles as shown in