Carboxymethyl cellulose binders enable high-rate capability of sulfurized polyacrylonitrile cathodes for Li-S batteries

Li, Yang, Zeng, Qingcong (Ray), Gentle, Ian R. and Wang, Da-Wei (2017) Carboxymethyl cellulose binders enable high-rate capability of sulfurized polyacrylonitrile cathodes for Li-S batteries. Journal of Materials Chemistry A, 5 11: 5460-5465. doi:10.1039/c7ta00040e


Author Li, Yang
Zeng, Qingcong (Ray)
Gentle, Ian R.
Wang, Da-Wei
Title Carboxymethyl cellulose binders enable high-rate capability of sulfurized polyacrylonitrile cathodes for Li-S batteries
Journal name Journal of Materials Chemistry A   Check publisher's open access policy
ISSN 2050-7496
2050-7488
Publication date 2017-04-01
Year available 2017
Sub-type Article (original research)
DOI 10.1039/c7ta00040e
Open Access Status Not yet assessed
Volume 5
Issue 11
Start page 5460
End page 5465
Total pages 6
Place of publication Cambridge, United Kingdom
Publisher Royal Society of Chemistry
Language eng
Abstract Li-S batteries have attracted ever-increasing interest in recent years due to their high theoretical specific energy. However, the cycling and rate performance of the sulfur cathode are seriously hindered by the notorious polysulfide dissolution and its low conductivity. Sulfurized carbon materials containing covalently bonded sulfur chains have shown relatively better stability for Li-S batteries. In this study, we report the improvement of the high-rate performance of sulfurized carbon cathodes derived through vulcanization of polyacrylonitrile. We compared sodium carboxymethyl cellulose (NaCMC) with poly(vinylpyrrolidone) (PVDF) as cathode binders for the sulfurized polyacrylonitrile (SPAN) electrode. The SPAN cathode using the NaCMC binder showed a capacity of 938 mA h g (-1) after 450 cycles at 0.9C rate (1C = 1675 mA h g (1)) and a capacity of 677 mA h g (1) at 5C rate; both performances are much superior to that of the SPAN cathode using the PVDF binder. This result illustrates the feasibility of using water-soluble oxygen-containing binders to improve the C-rate performance of sulfurized carbons.
Formatted abstract
Li-S batteries have attracted ever-increasing interest in recent years due to their high theoretical specific energy. However, the cycling and rate performance of the sulfur cathode are seriously hindered by the notorious polysulfide dissolution and its low conductivity. Sulfurized carbon materials containing covalently bonded sulfur chains have shown relatively better stability for Li-S batteries. In this study, we report the improvement of the high-rate performance of sulfurized carbon cathodes derived through vulcanization of polyacrylonitrile. We compared sodium carboxymethyl cellulose (NaCMC) with poly(vinylpyrrolidone) (PVDF) as cathode binders for the sulfurized polyacrylonitrile (SPAN) electrode. The SPAN cathode using the NaCMC binder showed a capacity of 938 mA h g−1 after 450 cycles at 0.9C rate (1C = 1675 mA h g−1) and a capacity of 677 mA h g−1 at 5C rate; both performances are much superior to that of the SPAN cathode using the PVDF binder. This result illustrates the feasibility of using water-soluble oxygen-containing binders to improve the C-rate performance of sulfurized carbons.
Keyword Chemistry, Physical
Energy & Fuels
Materials Science, Multidisciplinary
Chemistry
Energy & Fuels
Materials Science
Q-Index Code C1
Q-Index Status Provisional Code
Grant ID DP160103244
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: HERDC Pre-Audit
School of Chemistry and Molecular Biosciences
 
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