Performance enhancement of Li-S battery with the anatase nano structured Fe doped TiO2 as a robust interlayer

Omer Eroglu, Maryam Sadat Kiai, Huseyin Kizil*

*Bu çalışma için yazışmadan sorumlu yazar

Araştırma sonucu: Dergiye katkıMakalebilirkişi

14 Atıf (Scopus)

Özet

Li-S batteries are increasingly being investigated due to their high theoretical and practical energy density. During charge/discharge processes, reaction of elemental sulfur with Li+ ions leads to formation of soluble lithium polysulfides (LiPS) in the electrolyte, which diffuse toward the anode, known as the shuttle effect, which is the most serious problem about capacity degradation. One rational strategy to improve electrochemical performance of the cell relies on controlling the reactions on the coated separator surface so as to reduce LiPS shuttle between electrodes. In this work, Fe-doped (1 and 5 wt %) TiO2 synthesized via sol-jel method. This novel coating on the glass fiber separator improved polysulfides trapping and enhanced electrical conductivity. The cell with 5 wt % Fe doped separator showed low capacity decay rate of 0.08% per cycle with superior capacity retention of 751 mAh g−1 after 500 cycles at 1 C while the one with 1 wt % Fe doped showed capacity decay rate of 0.27% per cycle and capacity retention of 441 mAh g−1 after 500 cycles at 1 C.

Orijinal dilİngilizce
Makale numarası155607
DergiJournal of Alloys and Compounds
Hacim838
DOI'lar
Yayın durumuYayınlandı - 15 Eki 2020

Bibliyografik not

Publisher Copyright:
© 2020 Elsevier B.V.

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