Journal
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
Volume 160, Issue 8, Pages A1194-A1198Publisher
ELECTROCHEMICAL SOC INC
DOI: 10.1149/2.068308jes
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Funding
- Positec
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Canadian Foundation for Innovation (CFI)
- Canada Research Chairs (CRC)
- NSERC
- China Scholarship Council
- Ministry of Education and Science of Kazakhstan [1889]
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A novel sulfur/polyacrylonitrile/graphene nanocomposite has been synthesized via a simple combination of ballmilling with low temperature heat-treatment. The nanocomposite was examined as a cathode for high performance lithium/sulfur batteries. The SEM and TEM observations revealed that sulfur/polyacrylonitrile particles are incorporated into graphene networks homogenously. Charge/discharge tests and ac impedance spectroscopy have shown improved conductivity and electrochemical properties of the composite with the addition of graphene. The lithium cell with this ternary composite cathode delivered a discharge capacity of 612 mAh g(-1) in the second cycle at 0.1 C, and retained about 77% of this value over 100 cycles. Even up to 4 C rate, the lithium cell demonstrated an excellent rate capability, delivering a highly reversible discharge capacity of 360 mAh g(-1). (C) 2013 The Electrochemical Society.
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