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Transport parameter...
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Bandara, T M W J,1968University of Peradeniya
(författare)
Transport parameters of charge carriers in PEO-LiTf-based, plasticized, composite, and plasticized-composite electrolytes intended for Li-ion batteries
- Artikel/kapitelEngelska2022
Förlag, utgivningsår, omfång ...
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2022-04-05
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Springer Science and Business Media LLC,2022
Nummerbeteckningar
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LIBRIS-ID:oai:research.chalmers.se:b2d73447-9f53-4700-8ff6-ce3795ce640e
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https://doi.org/10.1007/s11581-022-04540-4DOI
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https://research.chalmers.se/publication/529471URI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:art swepub-publicationtype
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Ämneskategori:ref swepub-contenttype
Anmärkningar
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Solid polymer electrolytes are a key component in many electrochemical devices such as dye-sensitized solar cells, batteries, and supercapacitors. In this study, three electrolytes based on polyethylene oxide (PEO) host polymer, ethylene carbonate (EC) plasticizer, and Al2O3 filler were investigated. The polymer electrolytes (PEO)9(EC)9(LiCF3SO3)2, (PEO)9(LiCF3SO3)2(Al2O3)0.75, and (PEO)9(EC)9(LiCF3SO3)2(Al2O3)0.75 were characterized by analyzing DC conductivity, the frequency dependence of AC conductivity, and complex dielectric function. The conductivities of the plasticized, composite, and plasticized-composite electrolytes at 26 °C increase from 6.25, 0.009, and 2.96 mS cm-1 to 21.5, 0.12, and 11.4 mS cm-1, respectively, when the temperature increased to 70 °C. For the in-depth analysis of electrolytes, dielectric analysis was used to determine the charge carrier density (n), mobility (μ), and diffusion coefficient (D) using a newly developed method. Further, the investigation extended to study the temperature dependence of n, D, and μ. The study reveals that EC can increase the ionic conductivity by increasing n, and conversely, filler contributes by increasing μ, respectively. At 26 °C, (PEO)9(EC)9(LiCF3SO3)2(Al2O3)0.75 shows D, μ, and n of 3.8×10-11 m2 s-1, 1.5×10-9 m2 V-1 s-1, and 1.3×1027 m-3, respectively. The values obtained for D, μ, and n parameters of the plasticized electrolytes agree with those available for similar electrolytes, while the composite electrolyte showed considerably lower values for n. The complex impedance analysis can be used to determine transport parameters of all the types (plasticized, composite, and plasticized composite) of polymer electrolytes.
Ämnesord och genrebeteckningar
Biuppslag (personer, institutioner, konferenser, titlar ...)
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Gunasekara, L. B.E.University of Peradeniya
(författare)
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Gunathilake, S. M.S.University of Peradeniya
(författare)
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Mellander, Bengt-Erik,1949Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)f5xrk
(författare)
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University of PeradeniyaChalmers tekniska högskola
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Ionics: Springer Science and Business Media LLC28:6, s. 2701-27140947-70471862-0760
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