Mehmet Oğuz Güler

Lityum iyon piller için kalay (II) oksit kompozit anot elektrotlarının üretimi ve karakterizasyonu

Bu çalışmada Li-iyon piller için uyumlu çekirdek olarak kalay (II) oksit anotlar kimyasal indirgeme yöntemi ile sentezlenmiştir. Karbon esaslı kabuk sentezi için mikrodalga destekli karbürizasyon yöntemi kullanılmış ve SnO tozlarının yüzeylerinde ince amorf bir karbon tabakası elde edilmiştir. Üretilen kalay (II) oksit/karbon kompozit elektrotların yüzey morfolojileri Taramalı Elektron Mikroskobu (SEM) ile analiz edilmiş ve yapıların faz bileşenleri X-Işınları Difraktometresi (XRD) ile karakterize edilmiştir. Üretilen kalay (II) oksit/karbon kompozit tozları kullanılarak hazırlanan elektrotlar ile CR2016 test hücreleri hazırlanmış ve elektrotların elektrokimyasal performansı MTI BST8‒MA 8 kanallı pil test ünitesinde, oda sıcaklığında 10 mV ve 2,5 V arasında sabit 1C şarj/deşarj şartlarında akım verilerek test edilmiştir. Sonuç olarak, kalay (II) oksit/karbon kompozit elektrot malzemeleri ile 100 çevrim sonrasında 396 mAh g-1 deşarj kapasitesi elde edilmiştir.

Anahtar Kelimeler:

Kalay (II) oksit, çekirdek/kabuk, kimyasal indirgeme, mikrodalga destekli karbürizasyon, Li iyon pil

The Production and characterization of tin (II) oxide composite anode electrodes for lithium ion batteries

In this study, the core component of the composite, tin (II) oxide powders synthesized through a facile chemical reduction methods for Li-ion batteries. As the shell structure, surfaces of the as-synthesized tin (II) oxide particles were coated with carbon through microwave assisted carburization process. The surface morphologies and phase components of the as-synthesized tin (II) oxide/carbon composites were investigated via scanning electron microscopy and X-ray diffraction methods, respectively. CR2016 type coin cells were prepared by using tin (II) oxide/carbon composite powders and electrochemical tests were performed at room temperature via 8-channel MTI BST8‒MA electrochemical test station between 10 mV and 2.5 V potential range by applying fixed 1 C state of charge conditions. The results have shown that tin (II) oxide/carbon composite structure have significantly improved the specific capacities to 396 mAh g-1 after 100 cycles.

Keywords:

Tin (II) oxide, core/shell, chemical reduction, microwave assisted carburization, Li ion battery,

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