A novel polyphosphazene with nitroxide radical side groups as cathode-active material in Li-ion batteries

Yesilot S., Hacivelioglu F., Kucukkoylu S., Demir E., Celik K. B., Demir-Cakan R.

POLYMERS FOR ADVANCED TECHNOLOGIES, cilt.30, sa.12, ss.2977-2982, 2019 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 30 Sayı: 12
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1002/pat.4728
  • Dergi Adı: POLYMERS FOR ADVANCED TECHNOLOGIES
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.2977-2982
  • Anahtar Kelimeler: cathode-active material, energy, Li-ion batteries, nitroxide radical, polyphosphazene, RECHARGEABLE BATTERIES, CONDUCTIVITY, POLYMERS
  • Gazi Üniversitesi Adresli: Hayır

Özet

A novel polyphosphazene carrying stable nitroxide aromatic radical groups as a pendant with four electrons involvement per repeating unit is synthesized. To do so, series of macromolecular substitution reactions of poly (dichlorophosphazene) with 3,5-dibromophenol, 2-methyl-2-nitrosopropane, and lead oxide, respectively, are performed. After characterization of the newly synthesized polymers by standard spectroscopic techniques (such as Fourier transform infrared [FT-IR], nuclear magnetic resonance [NMR], or electron paramagnetic resonance [EPR]), the targeted polymer is further investigated as a cathode-active material for rechargeable lithium-ion batteries (LIBs). The cell delivered a good rate performance with a discharge capacity of 100 mAh/g at a C/2 current density over 500 cycles.