The N2 sorption isotherms were measured at 77 K using Micromeritics ASAP 2020 equipment. The samples were degassed under 200 °C for 24 h before the analysis. Low N2 dosing mode was carried out before the relative pressure P/P0 = 0.000105 in the adsorption branch. Total surface areas were calculated from the adsorption data at P/P0 0.001~0.051 using the Brunauer-Emmett-Teller (BET) model. Total pore volumes were calculated from the adsorption data at P/P0=0.99. The area and volume information of the micropore and mesopore were calculated from the adsorption data using the t-plot method (Carbon Black STSA model). The pore size distribution curves were obtained from the adsorption data using the non-local density functional theory (NLDFT) method, specifically with the N2-Carbon Finite Pores, AS=6. Here, AS=6 means a 2D model of finite slit pores having a diameter-to-width aspect ratio of 6. Slit type geometry of pores was used for simulation.