Growth mechanism and magnetic and electrochemical properties of Na0.44MnO2 nanorods as cathode material for Na-ion batteries

DEMİREL, SONER; Öz, Erdinç; ALTIN, EMİNE; ALTIN, SERDAR; BAYRİ, ALİ; Kaya, P.; Turan, S.; Avci, S.

doi:10.1016/j.matchar.2015.05.005

Makale Tam Makale Uluslararası 2015

Growth mechanism and magnetic and electrochemical properties of Na0.44MnO2 nanorods as cathode material for Na-ion batteries

SONER DEMİREL, Erdinç Öz, EMİNE ALTIN, SERDAR ALTIN, ALİ BAYRİ, P. Kaya, S. Turan, S. Avci

MATERIALS CHARACTERIZATION Cilt 105 · ss. 104–112 · 01.07.2015

DOI ile aç

Özet

Nanorods of Na0.44MnO2 are a promising cathode material for Na-ion batteries due to their large surface area and single crystalline structure. We report the growth mechanism of Na(0.44)Mno(2) nanorods via solid state synthesis and their physical properties. The structure and the morphology of the Na0.44MnO2 nanorods are investigated by X-ray diffraction (XRD), scanning and tunneling electron microscopy (SEM and TEM), and energy-dispersive X-ray (EDX) techniques. The growth mechanism of the rods is investigated and the effects of vapor pressure and partial melting of Na-rich regions are discussed. The magnetic measurements show an antiferromagnetic phase transition at 25 K and the Pelf is determined as 3.41 and 3.24 mu(B) from the chi-T curve and theoretical calculation, respectively. The electronic configuration and spin state of Mn3+ and Mn4+ are discussed in detail. The electrochemical properties of the cell fabricated using the nanorods are investigated and the peaks in the voltammogram are attributed to the diffusion of Na ions from different sites. Na intercalation process is explained by one and two Margules and van Laar models. (C) 2015 Elsevier Inc. All rights reserved.

Anahtar kelimeler

PERFORMANCE STORAGE GROWTH-MECHANISM Na0.44MnO2 nanorod Na-ion battery SINGLE-CRYSTALLINE NA0.44MNO2 SPINEL LIMN2O4 NANOWIRES LITHIUM-ION VAPOR-PRESSURE THERMODYNAMIC CONSIDERATIONS SODIUM INTERCALATION ELECTRODE MATERIALS INSERTION/DEINSERTION

Atıf için künye

DEMİREL, S., Öz, E., ALTIN, E., ALTIN, S., BAYRİ, A., Kaya, P., Turan, S., & Avci, S. (2015). Growth mechanism and magnetic and electrochemical properties of Na0.44MnO2 nanorods as cathode material for Na-ion batteries. MATERIALS CHARACTERIZATION, 105, 104–112. https://doi.org/10.1016/j.matchar.2015.05.005

BibTeX

@article{demirel2015-80051,
  author = {DEMİREL, SONER and Öz, Erdinç and ALTIN, EMİNE and ALTIN, SERDAR and BAYRİ, ALİ and Kaya, P. and Turan, S. and Avci, S.},
  title = {Growth mechanism and magnetic and electrochemical properties of Na0.44MnO2 nanorods as cathode material for Na-ion batteries},
  journal = {MATERIALS CHARACTERIZATION},
  year = {2015},
  volume = {105},
  pages = {104--112},
  issn = {1044-5803},
  doi = {10.1016/j.matchar.2015.05.005},
  url = {https://akademik.atauni.edu.tr/yayinlar/80051-growth-mechanism-and-magnetic-and-electrochemical-properties-of-na044mno2}
}