Next Article in Journal
Meltblown Solvated Mesophase Pitch-Based Carbon Fibers: Fiber Evolution and Characteristics
Previous Article in Journal
Functionalized Graphene–Polyoxometalate Nanodots Assembly as “Organic–Inorganic” Hybrid Supercapacitors and Insights into Electrode/Electrolyte Interfacial Processes
Article Menu
Issue 3 (September) cover image

Export Article

Open AccessArticle

Orange-Peel-Derived Carbon: Designing Sustainable and High-Performance Supercapacitor Electrodes

Department of Chemistry, Pittsburg State University, Pittsburg, KS 66762, USA
Department of Physics, Pittsburg State University, Pittsburg, KS 66762, USA
Department of Physics, The University of Memphis, Memphis, TN 38152, USA
Author to whom correspondence should be addressed.
Received: 27 July 2017 / Revised: 3 August 2017 / Accepted: 7 August 2017 / Published: 8 August 2017
PDF [6266 KB, uploaded 16 August 2017]


Interconnected hollow-structured carbon was successfully prepared from a readily available bio-waste precursor (orange peel) by pyrolysis and chemical activation (using KOH), and demonstrated its potential as a high-performing electrode material for energy storage. The surface area and pore size of carbon were controlled by varying the precursor carbon to KOH mass ratio. The specific surface area significantly increased with the increasing amount of KOH, reaching a specific surface area of 2521 m2/g for a 1:3 mass ratio of precursor carbon/KOH. However, a 1:1 mass ratio of precursor carbon/KOH displayed the optimum charge storage capacitance of 407 F/g, owing to the ideal combination of micro- and mesopores and a higher degree of graphitization. The capacitive performance varied with the electrolyte employed. The orange-peel-derived electrode in KOH electrolyte displayed the maximum capacitance and optimum rate capability. The orange-peel-derived electrode maintained above 100% capacitance retention during 5000 cyclic tests and identical charge storage over different bending status. The fabricated supercapacitor device delivered high energy density (100.4 µWh/cm2) and power density (6.87 mW/cm2), along with improved performance at elevated temperatures. Our study demonstrates that bio-waste can be easily converted into a high-performance and efficient energy storage device by employing a carefully architected electrode–electrolyte system. View Full-Text
Keywords: activated carbon; bio-waste; energy storage; orange peel; supercapacitor activated carbon; bio-waste; energy storage; orange peel; supercapacitor

Graphical abstract

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Supplementary materials

  • Supplementary File 1:

    Supplementary (PDF, 1143 KB)

  • Externally hosted supplementary file 1
    Doi: na
    Link: http://na
    Description: Supplementary file

Share & Cite This Article

MDPI and ACS Style

Ranaweera, C.K.; Kahol, P.K.; Ghimire, M.; Mishra, S.R.; Gupta, R.K. Orange-Peel-Derived Carbon: Designing Sustainable and High-Performance Supercapacitor Electrodes. C 2017, 3, 25.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Metrics

Article Access Statistics



[Return to top]
C EISSN 2311-5629 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top