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

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 lea...

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Bibliographic Details
Published in:Polymers for advanced technologies 2019-12, Vol.30 (12), p.2977-2982
Main Authors: Yeşilot, Serkan, Hacıvelioğlu, Ferda, Küçükköylü, Sedat, Demir, Emrah, Çelik, Kamile Burcu, Demir‐Cakan, Rezan
Format: Article
Language:English
Subjects:
Cathodes
cathode‐active material
Dibromophenol
Electron paramagnetic resonance
energy
Fourier transforms
Lead oxides
Lithium-ion batteries
Li‐ion batteries
nitroxide radical
NMR
Nuclear magnetic resonance
polyphosphazene
Rechargeable batteries
Substitution reactions
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Summary: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.
ISSN:1042-7147
1099-1581
DOI:10.1002/pat.4728