**4.1 Preparation of porous carbon for superior energy storage**

Devices having energy due to chemical reactions are getting more fame than other energy storage devices due to their considerable potential applications [28]. An instantaneous charging and discharging capability, which leads toward an efficient power density of about 10 kW kg−1, can be observed in supercapacitors. The fabrication flowchart for porous carbon is shown in **Figure 7**.
