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Preparation of sulfur micro-particles suitable for lithium sulfur batteries using sulfur vapor deposition

Hakimi, M ; Sharif University of Technology | 2019

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  1. Type of Document: Article
  2. DOI: 10.1088/2053-1591/ab3963
  3. Publisher: Institute of Physics Publishing , 2019
  4. Abstract:
  5. The current paper reports the deposition of sulfur micro-particles using sulfur vapor deposition (SVD). Sulfur particles in size of 5 to 45 μm were deposited on a stainless steel substrate to be used as the cathode with porous structure in lithium sulfur (Li-S) batteries. Mass loading of about 0.5 mg cm-2 was obtained from this pure sulfur cathode. The structure of this binder-free cathode was characterized by field emission scanning electron microscopy (FESEM), x-ray spectroscopy (EDS), and x-ray diffraction (XRD). The electrochemical performance of the battery with two different organic liquid ether- and carbonate-based electrolytes was investigated and the results demonstrated that the battery with the ether-based electrolyte had much higher stability. By using the ether-electrolyte, an initial high discharge capacity of 1088.21 mAh g-1 was achieved for the rechargeable battery at the current density of 100 mA g-1. For the first time, this cathode showed a coulombic efficiency as high as 95.63% after 100 cycles without LiNO3 additive in the electrolyte. However, the specific capacity decreased during the battery performance. © 2019 IOP Publishing Ltd
  6. Keywords:
  7. Li-S battery ; Organic liquid electrolyte ; Sulfur vapor deposition ; Electrolytes ; Ethers ; Field emission cathodes ; Field emission displays ; Field emission microscopes ; Lithium batteries ; Lithium compounds ; Nitrogen compounds ; Scanning electron microscopy ; Vapor deposition ; X ray spectroscopy ; Carbonate-based electrolytes ; Deposition of sulfurs ; Discharge capacities ; Electrochemical performance ; Field emission scanning electron microscopy ; Organic liquid electrolytes ; Stainless steel substrates ; Sulfur vapors ; Lithium sulfur batteries
  8. Source: Materials Research Express ; Volume 6, Issue 10 , 2019 ; 20531591 (ISSN)
  9. URL: https://iopscience.iop.org/article/10.1088/2053-1591/ab3963