Abstract
Doped poly(4,4′-diaminodiphenyl sulfone) (pDDS) is prepared for use as a cathode-active material of lithium secondary batteries by chemical oxidation method using ammonium persulfate initiator. The synthesized pDDS and doped pDDS are characterized by chemical structure analysis using Fourier-transform infrared spectroscopy and X-ray photoelectron spectroscopy. Cyclic voltammetry shows that the doped pDDS has a typical pair of redox peaks at 3.75/3.15 V vs. Li/Li+, corresponding to charging/discharging of the lithium ion. The discharge capacity at low current rate (0.05 C-rate) achieves 31.5 and 24.3 mA h g−1 in the initial and 50th cycles, respectively. The doped pDDS also shows good cycle performance and high-rate capability, making it appropriate as a cathode material of lithium secondary batteries.
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Acknowledgments
This research was supported by a grant from the Fundamental R&D Program for Core Technology of Materials funded by the Korean Ministry of Knowledge Economy and by the Priority Research Centers Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2009-0093818).
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Yun, SR., Kim, K.M., Ko, J.M. et al. Electrochemical properties of poly(4,4′-diaminodiphenyl sulfone) as a cathode material of lithium secondary batteries. Polym. Bull. 70, 3011–3018 (2013). https://doi.org/10.1007/s00289-013-1003-3
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DOI: https://doi.org/10.1007/s00289-013-1003-3