Layer-stacked graphite-like porous carbon for flexible all-solid-state supercapacitor

• Published in: Chemical engineering journal (Lausanne, Switzerland : 1996) Vol. 425; p. 130609
• Main Authors: Yang, Yikai, Wang, Jiashi, Zuo, Pingping, Qu, Shijie, Shen, Wenzhong
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.12.2021
• Subjects: Catalytic activation strategy; Coal tar pitch; Layer-stacked graphite-like porous carbon; Supercapacitor; Layer-stacked graphite-like porous carbon; Supercapacitor; Coal tar pitch; Catalytic activation strategy
• ISSN: 1385-8947; 1873-3212
• DOI: 10.1016/j.cej.2021.130609

[Display omitted] •Layer-stacked graphite-like porous carbon sheets was synthesized from coal tar pitch.•Formation mechanism of layer structure and high graphitization degree was illustrated.•The solid supercapacitor reached an excellent application performance. Layer-stacked graphite-like porous carbon (LGPC) piled by uniform carbon sheets (100 ± 20 nm) with both improved graphitization degree and high specific surface area was synthesized by introducing catalytic activation strategy to coal tar pitch with easy polycondensation. Formation mechanism of LGPC was also revealed by summarizing exhausted gases analysis, Fe species transformation and morphologies varying during the whole catalytic graphitization process. The LGPC electrode exhibited higher specific capacitance (337.0F/g at 0.5 A/g) and faster rate capability (85.6% from 0.5 to 20 A/g) in three-electrode system. All-solid-state supercapacitor fabricated with double equal LGPC electrodes and PVA/KOH membrance displayed ideal capacitance characteristics and flexibility. Three series of the flexible cell could drive LED lights of different color (1.8–2.4 V) for more than 5 min. Moreover, this work provided a facile and novel route for effective utilization of coal-based heavy products and development of graphitized porous carbon.