Functional, water-soluble binders for improved capacity and stability of lithium-sulfur batteries
2014 (English)In: Journal of Power Sources, ISSN 0378-7753, Vol. 264, 8-14 p.Article in journal (Refereed) Published
Binders based on mixtures of poly(ethylene oxide) (PEO) and poly(vinylpyrrolidone) (PVP) are here shown to significantly improve the reversible capacity and capacity retention of lithium- sulfur batteries compared to conventional binders. This mixed binder formulation combines the local improvement to the solvent system offered by PEO and the lithium (poly)sulfide-stabilising effect of PVP. Cells with cathodes made of simple mixtures of sulfur powder and carbon black with a binder of 4:1 PEO:PVP exhibited a reversible capacity of over 1000 mAh g(-1) at C/5 after 50 cycles and 800 mAh g(-1) at 1C after 200 cycles. Furthermore, these materials are water soluble, environmentally friendly and widely available, making them particularly interesting for large-scale production and applications in, for example, electric vehicles.
Place, publisher, year, edition, pages
2014. Vol. 264, 8-14 p.
Lithium-sulfur, Binder, Poly(vinylpyrrolidone), Poly(ethylene oxide)
Other Chemistry Topics
IdentifiersURN: urn:nbn:se:uu:diva-228938DOI: 10.1016/j.jpowsour.2014.04.090ISI: 000337861800002OAI: oai:DiVA.org:uu-228938DiVA: diva2:736940