期刊
POLYMER BULLETIN
卷 70, 期 11, 页码 3011-3018出版社
SPRINGER
DOI: 10.1007/s00289-013-1003-3
关键词
Poly(4,4 '-diaminodiphenyl sulfone); Cathode material; Electrochemical property; Lithium secondary battery
资金
- Fundamental R&D Program for Core Technology of Materials
- Korean Ministry of Knowledge Economy
- Priority Research Centers Program through the National Research Foundation of Korea (NRF)
- Ministry of Education, Science and Technology [2009-0093818]
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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