Photoassisted Charging of Li-Ion Oxygen Batteries Using g-C3N4/rGO Nanocomposite Photocatalysts

LÖKÇÜ E., Kaçar N., ÇAYIRLI M., ÖZDEN R. C., ANIK M.

ACS APPLIED MATERIALS & INTERFACES, cilt.14, sa.30, ss.34583-34592, 2022 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 14 Sayı: 30
  • Basım Tarihi: 2022
  • Doi Numarası: 10.1021/acsami.2c05607
  • Dergi Adı: ACS APPLIED MATERIALS & INTERFACES
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Compendex, EMBASE, INSPEC, MEDLINE
  • Sayfa Sayıları: ss.34583-34592
  • Anahtar Kelimeler: g-C3N4/rGO, nanocomposites, photocharging, Li-ion oxygen batteries, photocatalyst, METAL-FREE PHOTOCATALYST, LI-O-2 BATTERY, LITHIUM, PERFORMANCE, COMPOSITES, SIZE
  • Eskişehir Osmangazi Üniversitesi Adresli: Evet

Özet

In this work, g-C3N4/rGO nanocomposites were synthesized to use them as photocatalysts in Li-ion oxygen batteries by aiming at the reduction of the charging potential efficiently under photoassisted conditions. Fourier transform infrared (FTIR) spectra showed that novel C=C bonds formed between g-C3N4 and rGO during the decomposition of melamine and that the formation of these bonds was assumed to cause a red shift in the optical absorption band edge. The competition between the narrowing in the optical band gaps of the nanocomposites as a result of the red shift due to the presence of rGO and the degradation in the visible light utilization as a result of favorably absorbed incident light by rGO instead of g-C3N4 pointed out that the g-C3N4/3% rGO nanocomposite has the optimum light absorbance efficiency. The photoassisted charging tests indicated that the g-C3N4/3% rGO nanocomposite reduced the diarging potential effectively, especially at higher current densities, and improved the cyclic discharge-charge performance of the Li-ion oxygen batteries considerably.