Sevda AKTAŞ, Osman Murat ÖZKENDİR, Ülfet ATAV, Şule ATEŞ, Gültekin ÇELİK

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

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

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

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.

Keywords:

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

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