Lityum-Sülfür Bataryalar İçin Kükürt Tutucu cZIF-67/Ti3C2 Nanokompozitlerin Üretimi

Öz

Modern toplumun elektrikli araçlar, tüketici elektroniği ve şebeke tipi depolama gibi yeni nesil teknolojiler için ihtiyaç duyduğu yüksek perform2anslı enerji depolama sistemlerinin geliştirilmesi büyük önem taşıyor. Lityum-sülfür (Li-S) bataryalar, kükürtün yüksek teorik kapasitesi nedeniyle yüksek performanslı enerji depolama sistemleri için umut verici adaylardan biridir. Öte yandan kükürt’ün yalıtkan doğası ve polisülfit çözünürlüğü gibi bazı dezavantajlar Li-S bataryaların geniş çaptaki uygulamasını sınırlamaktadır. Yüksek yüzey alanına ve iletken doğaya sahip nanokompozit konak malzemeler, kükürt katotlarının stabilitesini iyileştirme potansiyeline sahiptir. Bu çalışmada, MOF’tan türetilmiş heteroatom katkılı karbon (cZIF-67) ve iki boyutlu Ti3C2 MXene malzemeler kullanılarak cZIF-67/Ti3C2 nanokompozitleri üretilmiştir. Üretilen nanokompozitler Li-S bataryalar için kükürt tutucu malzeme olarak kullanıldı. Yapısal ve kimyasal karakterizasyonların ardından S/cZIF-67/Ti3C2 nanokompozit katotlar Li-S bataryalarda kullanılarak performans ilintili özellikleri incelenmiştir. Üretilen S/cZIF-67/Ti3C2 katotlar ile kükürt’ün yalıtkan yapısından ve lityum polisülfitlerden kaynaklanan olumsuz etkiler ortadan kaldırılmıştır.

Anahtar Kelimeler

• Enerji Depolama
• Lityum-sülfür bataryalar
• MOF
• MXene

Proje Numarası

FBG-2021-1703

Fabrication of cZIF-67/Ti3C2 Nanocomposites As Sulfur Host For Lithium-Sulfur Batteries

Öz

It is of great importance to develop high-performance energy storage systems that modern society needs for next-generation technologies such as electric vehicles, consumer electronics, and grid-scale storage. Lithium-sulfur (Li-S) batteries are one of the promising candidates for high-performance energy storage systems due to the high theoretical capacity of the sulfur. On the other hand, some drawbacks such as insulating nature of the sulfur and the polysulfide solubility limits the wide-spread application of Li-S batteries. Nanocomposite host materials with high surface area and conductive nature has a potential to improve the stability of sulfur cathodes. In this study, the MOF-derived heteroatom doped carbon (cZIF-67) and two dimensional Ti3C2 MXene materials were used to fabricated cZIF-67/Ti3C2 nanocomposites. The fabricated nanocomposites were used as sulfur host material for Li-S batteries. After the structural and chemical characterizations, S/cZIF-67/Ti3C2 nanocomposite cathodes were used in Li-S batteries, and their performance-related properties were examined. With the fabricated S/cZIF-67/Ti3C2 cathodes, the adverse effects caused by the insulating nature of sulfur and lithium polysulfides are eliminated.

Anahtar Kelimeler

• Lithium-sulfur batteries
• MOF
• MXene

Destekleyen Kurum

Eskişehir Osmangazi University Scientific Research Projects Coordination Unit

Proje Numarası

FBG-2021-1703

Etik Beyan

There are no ethical issues regarding the publication of this study.

Kaynakça

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