Abstract
In the present study, a new type of cathode-active polymeric material was synthesized via a synthetic strategy which involves a series of high-yield and simple chemical reactions performed on a commercially available and relatively cheap polymer, poly(p-chloromethylstyrene). Polymeric support for the electro-active TEMPO was obtained by nitroxide-mediated polymerization (NMP) of p-chloromethyl styrene. This polystyrene derivative was converted to a polymer with pendant electro-active TEMPO radical groups via an azidation reaction which was followed by a click reaction with an alkyne functionalized TEMPO derivative. The obtained polystyrene bearing TEMPO radical polymer possessed a high spin density of 1.4 × 1021 spin/g indicating that electro-active TEMPO groups were successfully attached to the polymer with high yield. The composite cathode material obtained by mixing this TEMPO functionalized polymer with graphite showed a reversible electrochemical redox behavior in a cyclic voltammetry (CV) study vs. Li metal anode. The Li-battery constructed using this cathode maintained 83 % of the its initial capacity (35 mAh/g) over 80 cycles with a cell potential of 3.8 V.
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Acknowledgments
This work was financially supported by TUBITAK (The Scientific and Technological Research Council of Turkey) under the project number 112T516.
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Sertkol, S.B., Sinirlioglu, D., Esat, B. et al. A novel cathode material based on polystyrene with pendant TEMPO moieties obtained via click reaction and its use in rechargeable batteries. J Polym Res 22, 136 (2015). https://doi.org/10.1007/s10965-015-0777-4
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DOI: https://doi.org/10.1007/s10965-015-0777-4