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Effect of sodium salt in poly(ethylene oxide) electrolyte on initial discharge capacity of Na/poly(ethylene oxide)/S battery

Authors
Kim, IcpyoKweon, Jeong-HuiPark, JinyoungKim, Ki-WonAhn, In-ShupCho, Kwon-KooAhn, Jou-HyeonWang, GuoxiuRyu, Ho-SukAhn, Hyo-Jun
Issue Date
Aug-2016
Publisher
KOREAN ASSOC CRYSTAL GROWTH, INC
Keywords
organic compounds; microstructure; electrochemical properties; ionic conductivity; energy storage
Citation
JOURNAL OF CERAMIC PROCESSING RESEARCH, v.17, no.8, pp 799 - 802
Pages
4
Indexed
SCI
SCIE
SCOPUS
KCI
Journal Title
JOURNAL OF CERAMIC PROCESSING RESEARCH
Volume
17
Number
8
Start Page
799
End Page
802
URI
https://scholarworks.gnu.ac.kr/handle/sw.gnu/15350
ISSN
1229-9162
2672-152X
Abstract
To investigate the effects of sodium salt in a poly(ethylene oxide) (PEO) electrolyte on the initial discharge properties of a Na/S cell, various concentrations of NaCF3SO3 from 0.1 to 2.0 m were added to the electrolyte. Scanning electron microscopy and differential scanning calorimetry results showed a continuous decrease in the crystallinity of the PEO electrolyte with increasing amounts of sodium salt. The ionic conductivity of the PEO electrolyte at 70 degrees C increased with increasing sodium salt concentration up to 0.33 m, at which point the highest ionic conductivity of 1.732 x 10(-4) S cm(-1) was obtained. However, the ionic conductivity decreased at 2.0 m sodium salt. The same trend was seen in the initial discharge capacity, in that the highest value of 435 mAh g(-1) was achieved at a sodium salt concentration of 0.33 m. These results demonstrate that 0.33 m of sodium salt is the optimum composition for Na/S batteries.
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대학원 (나노신소재융합공학과)
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