Highly sulfur-rich polymeric cathode materials via inverse vulcanization of sulfur for lithium-sulfur batteries

YEŞİLOT S., Kucukkoylu S., MUTLU T., Demir E., DEMİR ÇAKAN R.

MATERIALS CHEMISTRY AND PHYSICS, cilt.285, 2022 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 285
  • Basım Tarihi: 2022
  • Doi Numarası: 10.1016/j.matchemphys.2022.126168
  • Dergi Adı: MATERIALS CHEMISTRY AND PHYSICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Chemical Abstracts Core, Communication Abstracts, INSPEC, Metadex, Civil Engineering Abstracts
  • Anahtar Kelimeler: High sulfur-rich, Polymeric cathode, Inverse vulcanization, Li-S battery, ELECTROCHEMICAL PERFORMANCE, ELEMENTAL SULFUR, POLYTHIOPHENE, IMPEDANCE, INTERLAYER, IMPROVE, ROBUST, BINDER
  • Gazi Üniversitesi Adresli: Evet

Özet

In the present study, a new polythiophene derivative bearing an acryloyloxy moiety in the side chain as a functional co-monomer, poly (3-[(2-acryloyloxy) methyl]) thiophene (PAMT), was synthesized to be used for the inverse vulcanization method with elemental sulfur (S8). Highly sulfur-rich graft materials, S-poly (3-[(2acryloyloxy) methyl]) thiophenes (52 and 74%) (S-PAMT), were prepared by inverse vulcanization of PAMT with different feed ratios of molten sulfur. Their structural characterizations were carried out by using appropriate standard spectroscopic methods such as FT-IR, DSC, TGA, SEM as well as XPS. The electrochemical performance of S-PAMT (74%) as a Li-S battery cathode material was evaluated. It was found that the fabricated cells delivered around 400 mAh.g(-1) stable capacity at a C/5 current density over 100 cycles. Electrochemical impedance spectroscopy (EIS) was also performed before and after cycling to further investigate the lithium storage mechanism of S-PAMT (74%).