Preparation of porous graphitic carbon and its dual-ion capacitance energy storage mechanism

Figure 1. SEM images of PC-K (a) and PC-Mg (b)；Figure 2. N2 adsorption/desorption isotherms (a) and the corresponding pore-size distributions (b) of PC-K and PC-Mg；Figure 3. TEM images of PC-KMg (a) and Citrate-PGC (b)；Figure 4. XRD patterns of as-prepared PC-KMg (a) and Citrate-PGC (b)；Figure 5. N2 adsorption/desorption isotherms of PC-KMg and Citrate-PGC；Figure 6. Pore-size distributions of Citrate-PGC；Figure 7. Galvanostatic charge/discharge (a) and cyclic voltammetry (b) curves of the positive electrode materials；Figure. 8. Galvanostatic discharge curves and energy performance of the positive electrode materials.