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- Title
Preparation of hierarchical porous carbons from a coal tar pitch modified by fluid catalytic cracking oil for a high-performance supercapacitor.
- Authors
Yin, Fan; Wei, Xian-Yong; Yan, Wei-Wei; Fan, Zi-Chun; Lu, Kun-Lang; Wei, Feng-Hua; Mao, Fa-Zhan; Zong, Zhi-Min
- Abstract
A template-free strategy was designed to prepare hierarchical porous carbons (HPCs) using fluid catalytic cracking oil modified a coal tar pitch (CTP). The resulting HPCs possess large specific surface areas, reasonable pore size distributions, and wrinkled structures, which could improve the overall electrochemical performance. They exhibit a specific capacitance value of 329 F g−1 at 0.5 A g−1 and still maintain 220 F g−1 at 20 A g−1, manifesting the remarkable rate capability. Additionally, the assembled symmetrical supercapacitor delivers a highest energy density of 23.6 Wh kg−1 at a power density of 500 W kg−1 and outstanding cycle stability of 92.8% capacitance retention after 10000 cycles. This work paves a new way to fabricate advanced carbon materials from low-cost CTP and provides a promising approach for value-added utilization of CTP.
- Subjects
COAL tar; CATALYTIC cracking; PORE size distribution; POWER density; ENERGY density; POLYANILINES; CHEMICAL templates
- Publication
Journal of Materials Science, 2021, Vol 56, Issue 29, p16591
- ISSN
0022-2461
- Publication type
Article
- DOI
10.1007/s10853-021-06317-y