Flexible Type Symmetric Supercapacitor Electrode Fabrication Using Phosphoric Acid-Activated Carbon Nanomaterials Derived from Cow Dung for Renewable Energy Applications.

Autor: Rajabathar JR; Surfactant Research Chair, Chemistry Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia., Sivachidambaram M; Catalysis Nanomaterials and Research Laboratory, Department of Chemistry, Loyola College, Chennai 600034, Tamilnadu, India.; Department of Chemistry, Theivanai Ammal College for Women, Villupuram 605602, Tamilnadu, India., Vijaya JJ; Catalysis Nanomaterials and Research Laboratory, Department of Chemistry, Loyola College, Chennai 600034, Tamilnadu, India., Al-Lohedan HA; Surfactant Research Chair, Chemistry Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia., Aldhayan DMD; Surfactant Research Chair, Chemistry Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia.
Jazyk: angličtina
Zdroj: ACS omega [ACS Omega] 2020 Jun 22; Vol. 5 (25), pp. 15028-15038. Date of Electronic Publication: 2020 Jun 22 (Print Publication: 2020).
DOI: 10.1021/acsomega.0c00848
Abstrakt: Porous-activated carbon (PAC) materials have been playing a vital role in meeting the challenges of the ever-increasing demand for alternative clean and sustainable energy technologies. In the present scenario, a facile approach is suggested to produce hierarchical PAC at different activation temperatures in the range of 600 to 900 °C by using cow dung (CD) waste as a precursor, and H 3 PO 4 is adopted as the nonconventional activating agent to obtain large surface area values. The as-prepared cow dung-based PAC (CDPAC) is graphitic in nature with mixed micro- and mesoporous textures. High-resolution scanning electron microscopy depicts the morphology of CDPAC as nanoporous structures with a uniform arrangement. High-resolution transmission electron microscopy reveals spherical carbon dense nanoparticles with dense tiny spherical carbon particles. N 2 adsorption-desorption isotherms show a very high specific surface area of 2457 m 2 /g for the CDPAC 9 (CD 9) sample with a large pore volume of 1.965 cm 3 /g. Electrochemical measurements of the CD 9 sample show a good specific capacitance ( C s ) of 347 F/g at a lower scan rate (5 mV/s) with improved cyclic stability, which is run up to 5000 cycles at a low current density (0.5 A/g). Hence, we choose an activated carbon prepared at 900 °C to fabricate the modified electrode material. In this regard, a flexible type symmetric supercapacitor device was fabricated, and the electrochemical test results show a supercapacitance value ( C s ) of 208 F/g.
Competing Interests: The authors declare no competing financial interest.
(Copyright © 2020 American Chemical Society.)
Databáze: MEDLINE
Externí odkaz: