Porosity Blocking in Highly Porous Carbon Black by PVdF Binder and Its Implications for the Li-S System

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Fältnamn	Indikatorer	Metadata
000		02768naa a2200325 4500
001		oai:DiVA.org:uu-239773
003		SwePub
008		141230s2014 \| \|\|\|\|\|\|\|\|\|\|\|000 \|\|eng\|
024	7	a https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-2397732 URI
024	7	a https://doi.org/10.1021/jp508137m2 DOI
040		a (SwePub)uu
041		a engb eng
042		9 SwePub
072	7	a ref2 swepub-contenttype
072	7	a art2 swepub-publicationtype
100	1	a Lacey, Matthew J.u Uppsala universitet,Strukturkemi4 aut0 (Swepub:uu)matla332
245	1 0	a Porosity Blocking in Highly Porous Carbon Black by PVdF Binder and Its Implications for the Li-S System
264		c 2014-10-30
264	1	b American Chemical Society (ACS),c 2014
338		a print2 rdacarrier
520		a In this work, the influence of cathode binders on the porosity of composite electrodes for lithiumsulfur (LiS) batteries employing high surface area carbon blacks has been closely scrutinized. This has been accomplished by comparison of PVdF with the related copolymer, PVdF-HFP. Analysis of carbon black porosity after addition of binder in NMP solution reveals that PVdF(-HFP) fills pores of almost any size in carbon black, which can effect a severe reduction in pore volume and surface area accessible to the electrolyte in a LiS cell. Noting the different swelling behavior of both binders, the implications of pore filling by the binder on the electrochemistry of LiS cells can be determined. Because of the low swellability of PVdF in dimethoxyethane:dioxolane (DME:DOL)-based electrolytes, access of the electrolyte to the carbon surface area and pore volume is restricted, with potentially severe detrimental effects on the available capacity of the cell. Furthermore, this effect is still clearly significant for common binder loadings and with preinfiltration of sulfur; this study is therefore a clear demonstration that PVdF is an unsuitable choice of binder for the lithiumsulfur system and that alternatives must be considered.
650	7	a NATURVETENSKAPx Kemi0 (SwePub)1042 hsv//swe
650	7	a NATURAL SCIENCESx Chemical Sciences0 (SwePub)1042 hsv//eng
700	1	a Jeschull, Fabianu Uppsala universitet,Strukturkemi4 aut0 (Swepub:uu)fabje686
700	1	a Edström, Kristina,d 1958-u Uppsala universitet,Strukturkemi4 aut0 (Swepub:uu)ked02526
700	1	a Brandell, Danielu Uppsala universitet,Strukturkemi4 aut0 (Swepub:uu)dbr10334
710	2	a Uppsala universitetb Strukturkemi4 org
773	0	t The Journal of Physical Chemistry Cd : American Chemical Society (ACS)g 118:45, s. 25890-25898q 118:45<25890-25898x 1932-7447x 1932-7455
856	4 8	u https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-239773
856	4 8	u https://doi.org/10.1021/jp508137m

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Av författaren/redakt...: Lacey, Matthew J ...; Jeschull, Fabian; Edström, Kristin ...; Brandell, Daniel

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