An experimental and computational study of graphene oxide functionalized with tris(hydroxymethyl)aminomethane as an electrode material for supercapacitors

Samira Mohammadi; S Morteza Mousavi-Khoshdel

doi:10.1038/s41598-023-44048-z

An experimental and computational study of graphene oxide functionalized with tris(hydroxymethyl)aminomethane as an electrode material for supercapacitors

Sci Rep. 2023 Oct 5;13(1):16756. doi: 10.1038/s41598-023-44048-z.

Authors

Samira Mohammadi¹, S Morteza Mousavi-Khoshdel²

Affiliations

¹ Industrial Electrochemical Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran, Iran.
² Industrial Electrochemical Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran, Iran. mmousavi@iust.ac.ir.

Abstract

In this research, graphene oxide (GO) functionalized with tris(hydroxymethyl)aminomethane (T) was synthesized with a simple one-pot method, and applied as an electrode material for supercapacitors. Electrochemical measurements on the synthesized tris(hydroxymethyl)aminomethane-functionalized graphene oxide (GO@T) indicated a specific capacitance of 549.8 F g^{- 1} at a specific current of 2.5 A g^{- 1} and a specific capacitance of 358 F g^-1 at a specific current of 7 A g^{- 1} in the potential range of - 0.5-0.5 V versus Ag/AgCl. It also showed a high cyclic stability. According to the results, 80 and 68% of the initial capacitance was retained after 5500 and 9300 cycles, respectively. Density functional theory calculations were used to investigate the quantum capacitance, free energy change during functionalization reaction, and the layer distance of GO and GO@T.