Hierarchical porous carbon materials derived from N, O, S-Containing Bio-Based polybenzoxazine for Supercapacitors. (13th June 2023)

• Record Type: Journal Article
• Authors: Jiang, Jin; Wang, Mengyao; Zhao, Wenli; Liu, Huihui; Wang, Yan; Song, Ping; Wang, Zhi
• Is Part Of: European polymer journal. Volume 191(2023)
• Publication Date: 2023-06-13
• Subjects: Bio-benzoxazine -- Dual activators -- Hierarchical porous carbon -- Pseudocapacitive species -- Supercapacitors; Polymers -- Periodicals; Polymerization -- Periodicals; Polymères -- Périodiques; Polymérisation -- Périodiques; Polymerization; Polymers; Periodicals; Electronic journals; 547.705
• DOI: 10.1016/j.eurpolymj.2023.112054
• Languages: English
• ISSNs: 0014-3057

Abstract

Graphical abstract: Highlights: A novel bio-based benzoxazine monomer containing N, O, S ternary elements has been successfully synthesized. The combination of KHCO3 and g-C3 N4 has been used as a mild dual activator to prepare hierarchical porous carbons. The optimized carbon exhibits a developed hierarchical porous structure and a higher density of active groups. The best sample has maximum mesopores contents and highest specific capacitor of 216.5 F g −1 . Abstract: Supercapacitors (SCs) play a crucial role in modern society due to their energy storage capabilities, but their widespread use is limited by their low energy density. To address this challenge, we developed a simple and sustainable synthesis method using a soft template and mild activation strategy (g-C3 N4 and KHCO3 ) to produce N, O, and S-doped hierarchical porous carbons (NOSHPCs) made from a new bio-based polybenzoxazine. The resulting NOSHPCs exhibit a large specific surface area of 1, 888 m 2 /g, a large pore volume of 1.53 cm 2 /g with a micro-, meso -, and macro- porous structure, and introduce more nitrogen atom in carbon surface by in-situ and ex-situ methods, the maximum content of N atom can reach 10.52 at%. The best electrode material (NOSHPCs-1:2:2) in a three-electrode system showed a specific capacitance of 216.5F/g at 0.5 A/g, attributed to the combination of active function groups and a rich porous structure. The symmetrical SCs exhibit an energy density of 5.67 Wh kg −1 at 275 W kg −1 using a KOH electrolyte, and exhibit excellent cycling stability (capacitance retention rate reach 90.38 % after 5000 cycles). This research not only provides an efficient way to synthesize hierarchical porous carbons, but also introduces a new bio-based polybenzoxazine material.