Defect Emission Energy and Particle Size Effects in Fe:ZnO Nanospheres Used in Li-Ion Batteries as Anode

SARF F., Kızıl H.

JOURNAL OF ELECTRONIC MATERIALS, cilt.50, sa.11, ss.6475-6481, 2021 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 50 Sayı: 11
  • Basım Tarihi: 2021
  • Doi Numarası: 10.1007/s11664-021-09191-1
  • Dergi Adı: JOURNAL OF ELECTRONIC MATERIALS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, PASCAL, Applied Science & Technology Source, Chemical Abstracts Core, Chimica, Compendex, Computer & Applied Sciences, INSPEC
  • Sayfa Sayıları: ss.6475-6481
  • Anahtar Kelimeler: Metal oxide, co-precipitation, energy storage, Li-ion battery, DOPED ZNO, NANOPARTICLES, PERFORMANCE, PHOTOLUMINESCENCE, IRON
  • İstanbul Teknik Üniversitesi Adresli: Evet

Özet

Pure and Fe-doped ZnO (Fe(x)Zn(y)V1-x-yO(2)) nanostructures with varying iron mole percentages of 3%, 4.5%, and 6% were synthesized by co-precipitation without vacuum ambient. Structural, morphological, defect, and electrochemical properties, when serving as an anode in Li-ion batteries, were studied. All the samples have a wurtzite ZnO crystallinity, and a slight shift from the x-ray diffraction patterns of Fe:ZnO samples shows that Fe3+ ions were substituted by Zn2+ ions. As the percentage of the Fe mole increases from 3% to 4.5%, the size of the particles decreases from 12 nm to 9 nm, but increases to 14 nm with 6% Fe doping. Although all the samples have a spherical type, and porous surfaces are exhibited in the 4.5% Fe:ZnO nanospheres. The emission bands originate due to energy levels generated by ZnO intrinsic defects in all the samples with changing emission peaks by Fe doping. The 4.5% Fe:ZnO results substantially enhance the specific capacity of 400 mAh g(-1) during 100 cycles.