A room temperature Na/S battery using a beta" alumina solid electrolyte separator, tetraethylene glycol dimethyl ether electrolyte, and a S/C composite cathode

Title
A room temperature Na/S battery using a beta" alumina solid electrolyte separator, tetraethylene glycol dimethyl ether electrolyte, and a S/C composite cathode
Authors
안재평김액표박진영김창현박진우안주현김기원안효준
Keywords
Na-S battery; solid electrolyte; sulfur cathode; composite
Issue Date
2016-01
Publisher
Journal of power sources
Citation
VOL 301-337
Abstract
To realize a high-performance room temperature Na/S battery with an elemental sulfur cathode, it is important that sodium polysulfides stay within the cathode and that they have room enough to react freely. In this work, sodium polysulfides are confined to the cathode using a beta '' alumina solid electrolyte separator and an optimal amount of tetraethylene glycol dimethyl ether (TEGDME) electrolyte. In addition, an activated carbon material, in the form of a sulfur/carbon (S/C) composite, with high surface area, porosity, and pore volume is employed in the cathode. The resulting Na/S battery shows a high first discharge capacity of 855 mAh g(-1) and coulombic efficiency close to 100%, as well as stable cyclability, with a discharge capacity of 521 mAh g(-1) at the 104th discharge.
URI
http://pubs.kist.re.kr/handle/201004/66948
ISSN
0378-7753
Appears in Collections:
KIST Publication > Article
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