Reduced polysulfide shuttle in lithium-sulfur batteries using Nafion-based separators
Bauer I, Thieme S, Brueckner J, Althues H, Kaskel S (2014)
Publication Type: Journal article
Publication year: 2014
Journal
Book Volume: 251
Pages Range: 417-422
DOI: 10.1016/j.jpowsour.2013.11.090
Abstract
Nafion-coated polypropylene separator (Celgard 2500) is used as cation-selective membrane for lithium sulfur batteries to suppress polysulfide diffusion enhancing the charge efficiency of the cells especially at low charge/discharge rates. The charge efficiency of the 10th cycle rises from about 70% to nearly 90% at a rate of C/20. The reduction of polysulfide penetration through the Nafion-coated Celgard 2500 is also proven by visual characterization. FTIR and SEM investigations verify a smooth and dense Nafion-coating on the porous polypropylene backbone of the separator. The influence of Nafion-loading on rate capability and discharge voltage is investigated by galvanostatic charge-discharge measurements. With the lowest Nafion-loading of 0.25 mg cm-2 we are able to achieve a rate capability comparable to uncoated Celgard 2500 up to current densities of 3 mA cm-2, whereas the functionality as polysulfide shuttle inhibitor is largely preserved. © 2013 Elsevier B.V. All rights reserved.
Involved external institutions
Germany (DE)How to cite
APA:
Bauer, I., Thieme, S., Brueckner, J., Althues, H., & Kaskel, S. (2014). Reduced polysulfide shuttle in lithium-sulfur batteries using Nafion-based separators. Journal of Power Sources, 251, 417-422. https://doi.org/10.1016/j.jpowsour.2013.11.090
MLA:
Bauer, I., et al. "Reduced polysulfide shuttle in lithium-sulfur batteries using Nafion-based separators." Journal of Power Sources 251 (2014): 417-422.
BibTeX: Download