Transforming polystyrene waste into 3D hierarchically porous carbon for high-performance supercapacitors.

Transforming polystyrene waste into 3D hierarchically porous carbon for high-performance supercapacitors.
Chemosphere. 2020 Aug;253:126755
Authors: Ma C, Min J, Gong J, Liu X, Mu X, Chen X, Tang T
Abstract
Polystyrene (PS) is usually discarded as a solid waste after a short lifespan. Thus the disposal of waste PS is an inevitably worldwide issue because of their stable and non-biodegradable nature. Herein, a facile method was proposed to carbonize PS waste into novel three-dimensional (3D) hierarchically porous carbon using Fe2O3 particles as both catalyst and template. Furthermore, KOH activation was applied to generate microporous and mesopores on the wall of macropores. As a result, the obtained 3D hierarchically porous carbon exhibits a high specific capacitance of 284.1 F g-1 at 0.5 A g-1 and good rate performance of 198 F g-1 at 20 A g-1 in a three-electrode device. Moreover, the assembled symmetrical capacitor displays a high energy density of 19.2 W h kg-1 at the power density of 200.7 W kg-1 in aqueous electrolyte. Therefore, the present research develops a sustainable way to recycle waste plastics into 3D hierarchically porous carbon for supercapacitors.
PMID: 32464775 [PubMed - in process]

Source: Chemosphere - May 30, 2020 Category: Chemistry Authors: Ma C, Min J, Gong J, Liu X, Mu X, Chen X, Tang T Tags: Chemosphere Source Type: research