Bulk-synthesis and supercapacitive energy storage applications of nanoporous triazine-based graphdiyne

Heteroatom doping and well-tuned porosity are regarded as two important pathways to enhance energy storage performance of porous carbon materials (PCMs). In this context, N-doped triazine-based graphdiyne (TGDY) and its hydrogen-containing counterpart HGDY were bulk-synthesized by Glaser coupling reaction from multi-acetylene monomers M1 and M2 respectively. TGDY exhibits a twodimensional layer-by-layer structure and a high specific BET surface area of 785 m(2) g(-1). After heattreatment at an optimized temperature of 800 degrees C, TGDY-80 0 shows a high specific capacitance of 250 F g(-1) at 0.1 A g(-1) and a remarkable capacitance retention of 97.6% at 1 A g(-1) after 10,000 cycles. These results are superior to HGDY-80 0 with similar structural skeleton and many other N-doped PCMs, indicating the synergetic effect of N-doping and high surface area. This work could effectively cast insight into designing of nanoporous carbon materials with good energy storage performance. (C) 2020 Elsevier Ltd. All rights reserved.