An alternative HCMS carbon catalyst in bromine reduction reaction for hydrogen-bromine flow batteries

KARAEYVAZ M. C., Duman B., FIÇICILAR B.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, cilt.46, sa.57, ss.29512-29522, 2021 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 46 Sayı: 57
  • Basım Tarihi: 2021
  • Doi Numarası: 10.1016/j.ijhydene.2020.11.055
  • Dergi Adı: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Artic & Antarctic Regions, Chemical Abstracts Core, Communication Abstracts, Environment Index, INSPEC
  • Sayfa Sayıları: ss.29512-29522
  • Anahtar Kelimeler: HCMS carbon, Hydrogen bromine redox flow battery, Cathode catalyst, Grid-scale energy storage system, CORE/MESOPOROUS SHELL CARBON, HOLLOW MACROPOROUS CORE, DOPED MESOPOROUS CARBON, HIGHLY EFFICIENT, SPHERICAL CARBON, REDOX REACTIONS, SUPPORT, MEMBRANES, ELECTRODE, NANOPARTICLES
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

In this study, significantly active hollow core mesoporous shell (HCMS) carbon catalysts are synthesized for the hydrogen-bromine flow battery cathode electrode. As an alternative to cathode catalysts such as Pt/C or carbon black, high surface area HCMS carbons are synthesized and its effect on hydrogen-bromine flow battery performance has been investigated for grid-scale energy storage for the first time. HCMS carbon is synthesized by template replication of the solid core mesoporous shell silica spheres. By changing the amount of TEOS (1 mL, 6 mL, 10 mL) used during silica template formation, carbons with different core/shell structures have been produced (HCMS1, HCMS6, HCMS10). Structural characterizations of the synthesized cathode catalysts have been performed with SEM, TEM, and N-2 adsorption analyses. Electrochemical characterization of catalysts has been performed by cyclic voltammetry analyses and flow battery performance tests. 0.50 W/cm(2) peak power density obtained with HCMS1 carbon is promising compared to Pt-based catalysts and commercial carbons. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.