Abstract
Coal-derived porous carbon has a long-range ordered structure that facilitates the speedy transfer of electrons, but it has fewer pores and sluggish electrolyte ion transport. On the contrary, the short-range ordered and amorphous structure of biomass-derived porous carbon hinders rapid electron transfer, but it is rich in pores, and electrolyte ions can be transported rapidly. Herein, we merge the long-range ordered structure of coal with the short-range ordered structure of cotton stalk to generate long/short-range ordered porous carbon with an interconnected structure. Benefiting from the interaction between coal and cotton stalks in the thermal decomposition process, the prepared sample shows long- and short-range ordered hybrid structure, a honeycomb-shaped structure, a substantial specific surface area (1278 m2 g−1) and a suitable mesoporous structure. Hence, the optimum sample exhibits a noteworthy specific capacitance (307 F g−1 at 1 A g−1), exceptional cycling stability over the long term, and a 64 % capacitance retention at 50 A g−1. Additionally, the sample also demonstrates exceptional energy storage performance in a symmetric two-electrode system (8.1 Wh kg−1 at 250 W kg−1). This paper presents a simple and effective method for preparing long/short-range ordered porous carbon materials.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call