fig6

Figure 6. (A) Schematic illustration for the two mixing procedures for preparation of the mixtures of Mg Glu and Glc; TEM images and SAED patterns of (B) HC600-1500 (F0:100) and (C) HC600-1500 (F50:50); (D) Rate performance and (E) Cycle performance of HC600-1500 (F50:50). Quoted with permission from Kamiyama et al.^[74]; (F) SEM image and (G) HRTEM and SAED images of CC-1600; (H) Cyclic capability of CCs. Quoted with permission from Li et al.^[75]; Mg Glu: Magnesium gluconate; Glc: glucose; HC600-1500 (F0:100) and HC600-1500 (F50:50): HC by heating the Mg Glu/Glc ratio of 0:100 mol and 50:50 mol, respectively, with preheat-treatment temperature at 600 °C and post-heat-treatment temperatures at 1,500 °C; HC400-1500 (F50:50) and HC550-1500 (F50:50): HC by heating the Mg Glu/Glc ratio of 50:50 mol and preheat-treatment temperature at 400 °C and 550 °C, respectively, with post-heat-treatment temperatures at 1,500 °C; CC-Pre-800: carbonisation process at 800 °C for a period of 2 h, followed by a washing procedure with a dilute hydrochloric acid solution (30% concentration); CC-1200, CC-1400, and CC-1600: cork-derived HC pyrolyzed at 1,200, 1,400, and 1,600 °C, respectively, under argon flow for 2 h; TEM: transmission electron microscopy; SAED: selected area electron diffraction; SEM: scanning electron microscope; HRTEM: high-resolution transmission electron microscopy.