TY - JOUR
T1 - One-step synthesis of branched sulfur/polypyrrole nanocomposite cathode for lithium rechargeable batteries
AU - Zhang, Yongguang
AU - Bakenov, Zhumabay
AU - Zhao, Yan
AU - Konarov, Aishuak
AU - Doan, The Nam Long
AU - Malik, Muhammad
AU - Paron, Todd
AU - Chen, P.
N1 - Funding Information:
This research was financially supported by Positec , Natural Sciences and Engineering Research Council of Canada (NSERC) , Canadian Foundation for Innovation (CFI) and the Canada Research Chairs (CRC) . The EM research described in this paper was performed at the Canadian Centre for Electron Microscopy at McMaster University, which is supported by NSERC and other government agencies. One of the authors (Y.Z.) thanks the China Scholarship Council for Study Abroad Scholarship.
PY - 2012/6/15
Y1 - 2012/6/15
N2 - A nanostructured sulfur/polypyrrole binary composite was prepared by a simple one-step ballmilling without heat-treatment. High resolution transmission and scanning electronic microscopy showed the formation of a highly developed branched structure consisting of polypyrrole with uniform sulfur coating on its surface. Exclusion of heat-treatment in the composite preparation avoided the sulfur loss; the composite contained 65 wt% of sulfur. AC impedance spectroscopy data exhibited remarkable reduction in charge transfer resistance of the composite compared with pristine sulfur. This may be due to the high conductivity and large surface area of polypyrrole. This charge transfer enhancement led to the electrochemical performance improvement of the composite cathode, delivering first discharge capacity of 1320 mAh g -1.
AB - A nanostructured sulfur/polypyrrole binary composite was prepared by a simple one-step ballmilling without heat-treatment. High resolution transmission and scanning electronic microscopy showed the formation of a highly developed branched structure consisting of polypyrrole with uniform sulfur coating on its surface. Exclusion of heat-treatment in the composite preparation avoided the sulfur loss; the composite contained 65 wt% of sulfur. AC impedance spectroscopy data exhibited remarkable reduction in charge transfer resistance of the composite compared with pristine sulfur. This may be due to the high conductivity and large surface area of polypyrrole. This charge transfer enhancement led to the electrochemical performance improvement of the composite cathode, delivering first discharge capacity of 1320 mAh g -1.
KW - Conducting sulfur composite
KW - Lithium-sulfur battery
KW - Sulfur cathode for lithium batteries
KW - Sulfur/polypyrrole composite
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U2 - 10.1016/j.jpowsour.2012.02.006
DO - 10.1016/j.jpowsour.2012.02.006
M3 - Article
AN - SCOPUS:84857380350
SN - 0378-7753
VL - 208
SP - 1
EP - 8
JO - Journal of Power Sources
JF - Journal of Power Sources
ER -
