Graphene supported heterogeneous catalysts for Li–O 2 batteries

ALAF M., Tocoglu U., Kartal M., Akbulut H.

Applied Surface Science, cilt.380, ss.185-192, 2016 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 380
  • Basım Tarihi: 2016
  • Doi Numarası: 10.1016/j.apsusc.2016.01.207
  • Dergi Adı: Applied Surface Science
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.185-192
  • Anahtar Kelimeler: Free-standing, Graphene, Li–air batteries, Manganese dioxide, Platinum nanoparticles
  • Bilecik Şeyh Edebali Üniversitesi Adresli: Evet

Özet

© 2016 Elsevier B.V. In this study production and characterization of free-standing and flexible (i) graphene, (ii) α-MnO 2 /graphene, (iii) Pt/graphene (iv) α-MnO 2 /Pt/graphene composite cathodes for Li–air batteries were reported. Graphene supported heterogeneous catalysts were produced by a facile method. In order to prevent aggregation of graphene sheets and increase not only interlayer distance but also surface area, a trace amount multi-wall carbon nano tube (MWCNT) was introduced to the composite structure. The obtained composite catalysts were characterized by SEM, X-ray diffraction, N 2 adsorption–desorption analyze and Raman spectroscopy. The electrochemical characterization tests including galvanostatic charge/discharge and electrochemical impedance spectroscopy (EIS) measurement of catalyst were carried out by using an ECC-Air test cell. These highly active graphene supported heterogeneous composite catalysts provide competitive properties relative to other catalyst materials for Li–air batteries.