TY - JOUR

T1 - Electrochemical properties of nitrogen and oxygen doped reduced graphene oxide

AU - Hartmann, Sean J.

AU - Iurchenkova, Anna A.

AU - Kallio, Tanja

AU - Fedorovskaya, Ekaterina O.

N1 - Hartmann, S.J.; Iurchenkova, A.A.; Kallio, T.; Fedorovskaya, E.O. Electrochemical Properties of Nitrogen and Oxygen Doped Reduced Graphene Oxide. Energies 2020, 13, 312

PY - 2020/1/1

Y1 - 2020/1/1

N2 - Carbon nanostructures are promising electrode materials for energy storage devices because of their unique physical and chemical properties. Modification of the surface improves the electrochemical properties of those materials because of the changes in morphology, diffusion properties, and inclusion of additional contributions to redox processes. Oxygen-containing functional groups and nitrogen doped into the carbon matrix significantly contribute to the electrochemical behavior of reduced graphite oxide (RGO). In this work, RGO was synthesized during hydrothermal treatment of graphite oxide with a hydrazine sulfate aqueous solution. Different amounts of hydrazine sulfate were used to synthesize RGO with different nitrogen contents in the structure, and the same synthesis conditions made it possible to obtain a material with a similar composition of oxygen-containing functional groups. The materials with different nitrogen concentrations and similar amounts of oxygen were compared as electrode materials for a supercapacitor and as a negative electrode material for a Li-ion battery. It was shown that the presence of oxygen-containing functional groups has the greatest influence on the behavior and efficiency of supercapacitor electrode materials, while nitrogen atoms embedded in the graphene lattice play the largest role in lithium intercalation.

AB - Carbon nanostructures are promising electrode materials for energy storage devices because of their unique physical and chemical properties. Modification of the surface improves the electrochemical properties of those materials because of the changes in morphology, diffusion properties, and inclusion of additional contributions to redox processes. Oxygen-containing functional groups and nitrogen doped into the carbon matrix significantly contribute to the electrochemical behavior of reduced graphite oxide (RGO). In this work, RGO was synthesized during hydrothermal treatment of graphite oxide with a hydrazine sulfate aqueous solution. Different amounts of hydrazine sulfate were used to synthesize RGO with different nitrogen contents in the structure, and the same synthesis conditions made it possible to obtain a material with a similar composition of oxygen-containing functional groups. The materials with different nitrogen concentrations and similar amounts of oxygen were compared as electrode materials for a supercapacitor and as a negative electrode material for a Li-ion battery. It was shown that the presence of oxygen-containing functional groups has the greatest influence on the behavior and efficiency of supercapacitor electrode materials, while nitrogen atoms embedded in the graphene lattice play the largest role in lithium intercalation.

KW - Cyclic voltammetry

KW - Fourier-transform infrared spectroscopy

KW - Hydrothermal treatment

KW - Li-ion batteries

KW - Oxygen-containing functional groups

KW - Raman spectroscopy

KW - Reduced graphene oxide

KW - Supercapacitors

KW - X-ray photoelectron spectroscopy

UR - http://www.scopus.com/inward/record.url?scp=85077820021&partnerID=8YFLogxK

U2 - 10.3390/en13020312

DO - 10.3390/en13020312

M3 - Article

AN - SCOPUS:85077820021

VL - 13

JO - Energies

JF - Energies

SN - 1996-1073

IS - 2

M1 - 312

ER -