One-step synthesis of branched sulfur/polypyrrole nanocomposite cathode for lithium rechargeable batteries
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Date
2012-06-15
Authors
Zhang, Yongguang
Bakenov, Zhumabay
Zhao, Yan
Konarov, Aishuak
Doan, The Nam Long
Malik, Muhammad
Paron, Todd
Chen, P.
Journal Title
Journal ISSN
Volume Title
Publisher
Journal of Power Sources
Abstract
Abstract 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 65wt% 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 1320mAhg−1.
Description
Keywords
Lithium–sulfur battery, Sulfur cathode for lithium batteries, Sulfur/polypyrrole composite, Conducting sulfur composite
Citation
Yongguang Zhang, Zhumabay Bakenov, Yan Zhao, Aishuak Konarov, The Nam Long Doan, Muhammad Malik, Todd Paron, P. Chen, One-step synthesis of branched sulfur/polypyrrole nanocomposite cathode for lithium rechargeable batteries, In Journal of Power Sources, Volume 208, 2012, Pages 1-8