Journal Article

Preparation of hierarchical porous carbons from a coal tar pitch modified by fluid catalytic cracking oil for a high-performance supercapacitor

Lu, Kun-Lang, Yin, Fan, Mao, Fa-Zhan, Yan, Wei-Wei, Zong, Zhi-Min, Wei, Feng-Hua, Wei, Xian-Yong, Fan, Zi-Chun

2021

Overview

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. Graphical abstract

• Publisher: Springer US,Springer,Springer Nature B.V
• Subject: Capacitance / Capacitors / carbon / Catalytic cracking / Characterization and Evaluation of Materials / Chemistry and Materials Science / Classical Mechanics / Coal tar / Crystallography and Scattering Methods / Electrochemical analysis / electrochemical capacitors / electrochemistry / energy density / Energy Materials / Fluid catalytic cracking / Flux density / Materials Science / oils / Pitch (material) / Polymer Sciences / Pore size / porosity / Solid Mechanics / Supercapacitors / value added