CHEMICAL SYNTHESIS OF Al AND Co DOPED LiNi6Mn2Fe2O2 (NMF) CATHODE MATERIAL

Yıl 2019, Cilt: 5 Sayı: 2, 62 - 67, 11.12.2019

Gulhan Cakmak

https://doi.org/10.22531/muglajsci.596341

Cited By: 2

Öz

Al ve Co
katkılı LiNi_xMn_yFe_zO₂ (NMF) sol-gel
yöntemi kullanılarak sentezlenmiştir. Katkıların LiNi_xMn_yFe_zO₂
(NMF) katot malzemelerinin yapısal stabilitesi üzerindeki etkisi araştırılmıştır.
Bu amaçla, tozlar, nitrat öncüllerinin sulu bir çözeltisi kullanılarak
hazırlanmış ve 850 ° C'de 5 saatte kalsine edilmiştir. LiNi_xMn_yFe_zO₂
sisteminin kimyasal bileşimi 622 (Ni / Mn / Fe atomik oran) olarak seçilmiş
başarıyla sentezlenmiştir. Elde edilen tozların kimyasal bileşimi enerji
saçılım spektroskopisi ile kontrol edilmiştir. Tozların morfolojisi taramalı
elektron mikroskobu kullanılarak incelenmiştir. Numunelerin kristal yapısı, X
ışını kırınımı ve Rietveld analizi kullanılarak analiz edilmiş ve ortalama
kristal büyüklüğü 60-70 nm arasında hesaplanmıştır. Co katkılı ve Al katkılı
622 katot malzemelerin tabakalı yapıya sahip olduğu [006] / [102] ve [108] /
[110] difraksiyon çiftleri ile görülmüştür.

Anahtar Kelimeler

Al ve Co ilaveli katot malzemeler, tabakalı yapıların kimyasal sentezi

CHEMICAL SYNTHESIS OF Al AND Co DOPED LiNi6Mn2Fe2O2 (NMF) CATHODE MATERIAL

Öz

Al and Co doped LiNi_xMn_yFe_zO₂
(NMF) was synthesized using sol-gel method. The effect of dopants on the
structural stability of LiNi_xMn_yFe_zO₂
(NMF) cathode material was investigated. For this purpose, the powder
preparation was carried out using an aqueous solution of the nitrate precursors
followed by calcination at 850 °C 5h. The chemical composition of LiNi_xMn_yFe_zO₂
base material was selected as 622 (Ni/Mn/Fe atomic ratio) and were successfully
synthesized in layered form. Chemical composition of the obtained powders was
determined by Energy dispersive spectroscopy. Scanning electron microscopy was applied
to investigate the morphology of the powders. The crystal structure of the
samples was analyzed using X-ray diffraction and Rietveld analysis. Average
crystallite size from Rietveld refinement was calculated to be between 60-70
nm. Co-doped and Al-doped 622 cathode materials showed [006]/[102] and
[108]/[110] doublets, which is the sign of layered structure with hexagonal
ordering

 

Anahtar Kelimeler

Al and Co doped cathode materials, chemical synthesis of layered material

Kaynakça

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