İndiyum katkılı LATP katı elektrolitinin yapısı ve katkılamanın iyonik iletkenlik üzerindeki etkisi

Yıl 2024, Cilt: 13 Sayı: 4, 1428 - 1434, 15.10.2024

Fatih Öksüzoğlu , Gültekin Çelik

https://doi.org/10.28948/ngumuh.1495188

Öz

Katı hal piller için, oda sıcaklığında iyonik iletkenliği iyileştirmek için kalsinasyon tekniklerini iyileştirmek ve katı elektrolit sistemine uygun element katkısı yaygın olarak önerilmiştir. Element katkısı, LATP katı elektrolitlerinin fizikokimyasal ve elektrokimyasal özelliklerini artırmak için en doğru yöntemlerdendir. LATP sistemindeki titanyum bölgesinde indiyum katkısı kapsamlı bir şekilde incelenmemiştir. İndiyumun daha büyük iyonik yarıçapı ile kafes hacmini artırabileceği ve böylece iyonik iletkenliği artırabileceği varsayılmaktadır. Bu çalışmada, %10 indiyum katkılı LiAlTi(PO4)3 (LATP) katı elektrolitinin iyonik iletkenliği incelenmiştir. Sentezlenen LiAlInTi(PO4)3 (LAITP) katı elektrolit, sırasıyla X-ışını kırınımı (XRD), taramalı elektron mikroskobu (SEM) ve elektrokimyasal empedans spektroskopisi (EIS) kullanılarak kristal yapısı, morfolojik özellikleri ve Li+ iyon iletkenliği açısından karakterize edilmiştir. Sonuçlar, indiyum katkısının LATP'ye kıyasla nispeten daha düşük iyonik iletkenliğe rağmen, yine de tamamen katı hal lityum iyon piller için katı elektrolitlerin geliştirilmesini teşvik edebileceğini göstermektedir.

Anahtar Kelimeler

Katı hal batarya, İndiyum katkısı, Seramikler

Destekleyen Kurum

Selçuk Üniversitesi Bilimsel Araştırma Projeleri (BAP) Birimi

Proje Numarası

23401002

Structure of indium-doped LATP solid electrolyte and effect of doping on ionic conductivity

Öz

For solid-state batteries, improving calcination techniques to improve ionic conductivity at room temperature and appropriate element doping to the solid electrolyte system have been widely proposed. Element doping is one of the most accurate methods to improve the physicochemical and electrochemical properties of LATP solid electrolytes. The doping of indium at the titanium site in the LATP system has not been extensively studied. It is hypothesised that indium can increase the lattice volume with its larger ionic radius and thus increase the ionic conductivity. In this study, the ionic conductivity of 10% indium doped LiAlTi(PO4)3 (LATP) solid electrolyte was investigated. The synthesised LiAlInTi(PO4)3 (LAITP) solid electrolyte was characterised in terms of crystal structure, morphological properties and Li+ ion conductivity using X-ray diffraction (XRD), scanning electron microscopy (SEM) and electrochemical impedance spectroscopy (EIS), respectively. The results show that indium doping, despite the relatively lower ionic conductivity compared to LATP, can still promote the development of solid electrolytes for all-solid-state lithium ion batteries.

Anahtar Kelimeler

Solid state battery, Indiyum katkısı, Ceramics

Proje Numarası

23401002

Kaynakça

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