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

Abstract

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

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

Abstract

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.

Keywords

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

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