Preparation of N-doped graphene-based electrode via electrochemical method and its application in vanadium redox flow battery


Gursu H., GENÇTEN M. , ŞAHİN Y.

INTERNATIONAL JOURNAL OF ENERGY RESEARCH, cilt.42, ss.3851-3860, 2018 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 42 Konu: 12
  • Basım Tarihi: 2018
  • Doi Numarası: 10.1002/er.4117
  • Dergi Adı: INTERNATIONAL JOURNAL OF ENERGY RESEARCH
  • Sayfa Sayıları: ss.3851-3860

Özet

An N-doped graphene electrode has been prepared by cyclic voltammetric method in 5.0M of HNO3 solution on a graphite-based electrode at room temperature. The modification of the electrode surface with different types of N-containing groups, such as nitro groups, pyrrolic N, and pyridinic N, has been controlled by changing the scanned potential ranges. The formation of an N-doped graphene electrode has been confirmed by scanning electron microscopic, atomic force microscopic, X-ray photoelectron, and Raman spectroscopic methods. The prepared N-doped graphene-modified electrodes have been used in positive electrolyte of a vanadium-based redox flow battery. As positive electrodes, the electrochemically modified electrodes prepared in 5.0M of HNO3 solution -1.0 to (+1.9) and -0.7 to (+1.9) V had more than 140 and 120mA/cm(2) anodic and cathodic peak currents, respectively, in vanadium redox battery. This fast, low-cost, and environmentally friendly method can be used in many application areas, such as optical devices, (bio)sensors, energy storage materials, and electronic devices.