One-step preparation of binder-free nickel-containing graphene foam electrode for supercapacitors

Siyahjani Gultekin S., Karimi A. A., Can M., Demic S.

Energy Storage, cilt.6, sa.2, 2024 (ESCI) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 6 Sayı: 2
  • Basım Tarihi: 2024
  • Doi Numarası: 10.1002/est2.599
  • Dergi Adı: Energy Storage
  • Derginin Tarandığı İndeksler: Emerging Sources Citation Index (ESCI), Scopus, Academic Search Premier, Applied Science & Technology Source, Compendex, INSPEC
  • Anahtar Kelimeler: foam electrode, nickel hydroxide, self-templated, supercapacitor
  • Çanakkale Onsekiz Mart Üniversitesi Adresli: Evet

Özet

In this study, a nickel hydroxide (Ni(OH)2)-modified reduced graphene oxide (rGO) foam electrode for supercapacitor application is presented. The electrode was prepared without using a binder through a one-step process with three different ratios (NirGO1, NirGO2, and NirGo3). To compare the supercapacitor performance of the obtained graphene foam electrodes, rGO and rGO:carbon black (CB) standard electrodes with PVDF-HFP binder were also prepared. All electrodes were then characterized structurally (XPS, EDS, RAMAN, XRD, and FT-IR) and morphologically (SEM). Structural characterizations demonstrated that the Ni-containing electrodes were in α-Ni(OH)2:rGO structure. In addition, NirGO3 exhibited a specific capacitance of 800 F g−1 which is relatively the highest performance between the foam electrodes, while rGO:CB presented a specific capacitance of 900 F g−1. The results demonstrated that with the method proposed for electrode development, it was possible to obtain comparable results with the standard electrode rGO:CB.