Hierarchical Porous Carbon With High Nitrogen Content Derived From Plant Waste (Pomelo Peel) For Supercapacitor

Abstract

The plant waste pomelo peels are used as carbon precursors to fabricate nitrogen-doped hierarchical porous carbon. The sample PC600 is fabricated at mild calcination temperature of 600 °C, which has nitrogen content of as high as 4.47% and hierarchical pores with a BET surface area of 1104 m2 g−1. The symmetric supercapacitor based on PC600//PC600 electrodes exhibits excellent electrochemical performance benefiting from both the electric double-layer capacitance and pseudocapacitance of PC600. In 1 M H2SO4 electrolyte, this supercapacitor delivers gravimetric capacitance of 208.7 F g−1, volumetric capacitance of 219.3 F cm−3, and energy density of 7.3 Wh kg−1 at a current density of 1 A g−1. Furthermore, the extraordinary energy density of 21.6 Wh kg−1 at 1 A g−1 and 17.1 Wh kg−1 at 20 A g−1 are obtained in 1-ethyl-3-methylimidazolium tetrafluoroborate (EMIMBF4) electrolyte. The suitable calcination process can make the contents of nitrogen atoms and pores structures in PC600 to achieve an optimal combination, leading to improved electrochemical performance.

Publication Date

5-1-2018

Publication Title

Journal of Materials Science: Materials in Electronics

Volume

29

Issue

9

Number of Pages

7707-7717

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1007/s10854-018-8766-0

Socpus ID

85045327379 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85045327379

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