High capacity cathode materials for Li-S batteries

Title
High capacity cathode materials for Li-S batteries
Authors
Ho Suk RyuJin Woo ParkJinsoo Park안재평Ki-Won KimJou-Hyeon AhnTae-Hyeon NamGuoxiu WangHyo-Jun Ahn
Keywords
New cathode; TEM; Sulfur cathode
Issue Date
2013-01
Publisher
Journal of materials chemistry. A, Materials for energy and sustainability
Citation
VOL 1, 1573-1578
Abstract
To enhance the stability of sulfur cathode for a high energy lithium–sulfur battery, sulfur–activated carbon (S–AC) composite was prepared by encapsulating sulfur into micropores of activated carbon using a solution-based processing technique. In the analysis using the prepared specimen of S–AC composite by the focused ion beam (FIB) technique, the elemental sulfur exists in a highly dispersed state inside the micropores of activated carbon, which has a large surface area and a narrow pore distribution. The S–AC composite was characterized through X-ray powder diffraction (XRD), transmission electron microscopy (TEM), Brunauer–Emmett–Teller (BET) method, selected area electron diffraction (SAED), energy dispersive X-ray spectrometry (EDX), Fourier transform infrared spectroscopy (FT-IR), thermogravimetry analysis (TGA), and field emission scanning electron microscopy (FESEM). A lithium– sulfur cell using the S–AC composite has a high first discharge capacity over 800 mA h g-1 S even at a high current density such as 2C (3200 mA g-1 S) and has good cycleability around 500 mA h g-1 S discharge capacity at the 50th cycle at the same current density.
URI
http://pubs.kist.re.kr/handle/201004/44639
ISSN
20507488
Appears in Collections:
KIST Publication > Article
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE