The Effect of Ball Milling Time on the Synthesis of Garnet-like Li7La3Zr2O12 Li-ion Conductor

Yıl 2018, Cilt: 44 Sayı: 1, 79 - 86, 30.04.2018

Sevda Aktaş , Osman Murat Özkendir Ülfet Atav , Şule Ateş , Gültekin Çelik

Öz

In
this study Li₇La₃Zr₂O₁₂
Li-ion conductor was synthesized by applying a mechanical
activation followed by heat treatment to a mixture of lithium carbonate (Li₂CO₃),
lanthanium oxide (La₂O₃) and zirconium oxide (ZrO₂).
The effect of different milling times during synthesis on the formation of
crystal structure phases, morphological properties and particle size were
investigated by X-ray diffraction (XRD) pattern and scanning electron
microscope (SEM). Detailed crystal structure analysis done by MAUD software
demonstrated while first milling time is effective on synthesis of the high
ionic conductive phase of the Li₇La₃Zr₂O₁₂
cyrstal last milling time is effective on the cyrstallite size.

Anahtar Kelimeler

Solid electrolytes, Ball milling, Li-ion batteries, Lithium ion conductor

Bilyeli Öğütme Süresinin Garnet Benzeri Li7La3Zr2O12 Li-iyon İletkeninin Sentezine Etkisi

Öz

Bu
çalışmada lityum karbonat (Li₂CO₃), lantan oksit (La₂O₃)
ve zirkonyum oksit (ZrO₂) maddelerine mekaniksel karışım ve ardından
ısıl işlem uygulanarak Li₇La₃Zr₂O₁₂ Li-iyon
iletkeni sentezlenmiştir. Sentez sırasında uygulanan farklı öğütme sürelerinin
kristal yapıdaki faz oluşumlarına, morfolojik özelliklere ve parçacık
boyutlarına etkisi X-ışını kırınımı deseni (XRD) ve taramalı elektron
mikroskobu (SEM) ile incelenmiştir. Elde edilen yapıya ait XRD görüntüsünün
MAUD yazılımı ile yapılan ayrıntılı kristal yapı analizi, ilk öğütme süresinin
Li₇La₃Zr₂O₁₂ kristalinin yüksek
iyonik iletken faz sentezinde etkili olduğunu gösterirken son öğütme süresinin
ise kristalite boyutunda etkili olduğunu göstermiştir.

Anahtar Kelimeler

Katı elektrolitler, Bilyeli öğütme, Li-iyon piller, Lityum iyon iletkeni

Kaynakça

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