Impedance spectroscopy on polymer electrolytes containing Lithium and Magnesium ions

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Fältnamn	Indikatorer	Metadata
000		02862naa a2200325 4500
001		oai:DiVA.org:uu-319630
003		SwePub
008		170406s2006 \| \|\|\|\|\|\|\|\|\|\|\|000 \|\|eng\|
024	7	a https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-3196302 URI
040		a (SwePub)uu
041		a engb eng
042		9 SwePub
072	7	a vet2 swepub-contenttype
072	7	a kon2 swepub-publicationtype
100	1	a Furlani, Mauriziou Uppsala universitet,Fasta tillståndets fysik,Chalmers University of Technology4 aut
245	1 0	a Impedance spectroscopy on polymer electrolytes containing Lithium and Magnesium ions
264	1	c 2006
338		a electronic2 rdacarrier
520		a A detailed impedance spectroscopy study, together with thermal analysis, was carried out on polymer electrolytes composed of low molecular weight poly(ethylene oxide) 400 with added lithium or magnesium triflate salts. Glass transition temperatures were always far below room temperature. The ion conductivity exhibits a maximum at intermediate salt concentrations and is significantly higher in the case of Li triflate addition. When the ion conductivity contribution was subtracted, a prominent dielectric loss peak in the MHz region was observed. Its relaxation strength scales with ion concentration, as appropriate for an ion pair relaxation in systems above the glass transition. We present evidence that this relaxation is due to the same species that give rise to the ion conductivity. The complex impedance due to the composite ion conductivity – ion pair relaxation process was found to exhibit good agreement with the Davidson-Cole [D.V. Davidson and R.H. Cole, J. Chem. Phys., 19 (1951) 1484-1490] relaxation function. The relaxation process is characterized by a power-law exponent below 0.5, which signifies an anomalous diffusion process at high frequencies crossing over to a constant conductivity at low frequencies.
650	7	a NATURVETENSKAPx Fysikx Den kondenserade materiens fysik0 (SwePub)103042 hsv//swe
650	7	a NATURAL SCIENCESx Physical Sciencesx Condensed Matter Physics0 (SwePub)103042 hsv//eng
653		a Engineering Science with specialization in Solid State Physics
653		a Teknisk fysik med inriktning mot fasta tillståndets fysik
700	1	a Carlson, Johannau Chalmers University of Technology4 aut
700	1	a Fredriksson, Marieu Chalmers University of Technology4 aut
700	1	a Mellander, Bengt-Eriku Chalmers University of Technology4 aut
700	1	a Niklasson, Gunnar A.,d 1953-u Uppsala universitet,Fasta tillståndets fysik4 aut0 (Swepub:uu)gni26208
710	2	a Uppsala universitetb Fasta tillståndets fysik4 org
856	4	u https://uu.diva-portal.org/smash/get/diva2:1087306/FULLTEXT01.pdfx primaryx Raw objecty fulltext:preprint
856	4 8	u https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-319630

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Av författaren/redakt...: Furlani, Maurizi ...; Carlson, Johanna; Fredriksson, Mar ...; Mellander, Bengt ...; Niklasson, Gunna ...

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