1. Preparation of hierarchical porous carbons from a coal tar pitch modified by fluid catalytic cracking oil for a high-performance supercapacitor
- Author
-
Zhi-Min Zong, Fan Yin, Zi-Chun Fan, Feng-Hua Wei, Xian-Yong Wei, Fa-Zhan Mao, Wei-Wei Yan, and Kun-Lang Lu
- Subjects
Supercapacitor ,Work (thermodynamics) ,Materials science ,Mechanical Engineering ,chemistry.chemical_element ,Electrochemistry ,Fluid catalytic cracking ,Capacitance ,chemistry ,Chemical engineering ,Mechanics of Materials ,medicine ,General Materials Science ,Coal tar ,Carbon ,Power density ,medicine.drug - 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.
- Published
- 2021