Akademik Veri Yönetim Sistemi
Tezin Türü: Yüksek Lisans
Tezin Yürütüldüğü Kurum: Orta Doğu Teknik Üniversitesi, Mühendislik Fakültesi, Metalurji ve Malzeme Mühendisliği Bölümü, Türkiye
Tezin Onay Tarihi: 2017
Tezin Dili: İngilizce
Öğrenci: Cansu Savaş
Danışman: MEHMET KADRİ AYDINOL
Özet:Layered LiNiO2 compared to its commercial counterpart LiCoO2, has higher energy density and lower cost. However, it is difficult to synthesize and has stability and safety problems. These properties were improved with alloying, and today LiNi0.8Co0.15Al0.05O2 (NCA) electrode material is commercially produced. However, it is still not considered as safe, due to inherent chemistry and morphological particle characteristics. In this study, LiNiXCoyAlzMvO2 compounds (M=Na, Ca, Fe, Cu, Cr, La, Y, V, Zr) will be synthesized. In order to control crystallite and particle sizes, morphology and size distribution, ultrasonic sound assisted (co/sequential)-precipitation method will be utilized. Synthesized NCA cathode active materials will be characterized using PSA, SEM, XRD, EDS, ICP, EIS and galvanostatic charge discharge tests, focusing on the improvement of capacity, cycle life, safety and rate capability