Effect of nano-porous Al2O3 on thermal, dielectric and transport properties of the (PEO)9LiTFSI polymer electrolyte system

Jayathilaka, P.A.R.D.; Dissanayake, M.A.K.L.; Albinsson, Ingvar; Mellander, Bengt-Erik

doi:10.1016/s0013-4686(02)00243-8

Cited by 283 publications

(199 citation statements)

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“…The other contribution to the conductivity enhancement comes from the reduction of crystallinity due to the added filler. It is evident from the increase of the conductivity in the amorphous phase in PEO-based electrolytes [30,31]. Figure 5 shows the variation of conductivity with alumina content at 0, 6, 12 and 18°C.…”

Section: Resultsmentioning

confidence: 94%

“…This drop can be due to the Bblocking effect^imposed by more prevalent alumina grains. The decrease in conductivity can also be attributed to immobilization of the host polymer by geometric constrictions of non-conducting ceramic fillers [30,37]. The small bump shown in Fig.…”

Section: Resultsmentioning

confidence: 97%

“…Major contribution is resulted in the creation of favourable conducting paths through Lewis acidbase type surface interactions of ionic species with O/OH groups in the filler surface [31,32]. It has been revealed that the highest conductivity enhancement for a PEO-based Liconducting electrolyte is given for the filler particles with acidic groups followed by basic, neutral and weakly acidic [30]. The other contribution to the conductivity enhancement comes from the reduction of crystallinity due to the added filler.…”

Section: Resultsmentioning

confidence: 99%

“…The difference between static and high-frequency dielectric constants is a measure of the polarization constituents in the material. Dielectric analysis of all the samples was performed using the real (ε′) and imaginary (ε″) parts of the dielectric function extracted from high-frequency impedance data [30,31]. Real and imaginary parts of the dielectric function are calculated using the following Eqs.…”

Section: Resultsmentioning

confidence: 99%

“…The inorganic fillers can also be dispersed in host polymer in order to fabricate composite solid polymer electrolytes. However, the role of the filler in enhancing the ionic conductivity is still not clearly resolved [21,[30][31][32]. The inorganic fillers such as nano-sized, Al 2 O 3 , TiO 2 , SiO 2 and BaTiO 3 contribute to the ionic conductivity by enhancing the stability of highly conductive amorphous phase, which in turn improved the electrode-electrolyte interfacial contacts by providing conducting pathways for ionic spices [30,33,34].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Electrical and complex dielectric behaviour of composite polymer electrolyte based on PEO, alumina and tetrapropylammonium iodide

Bandara

Karunathilaka

Ratnasekera

et al. 2017

Ionics

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In this study, the electrical, dielectric and morphological analysis of composite solid polymer electrolytes containing polyethylene oxide, alumina nano-fillers and tetrapropylammonium iodide are conducted. The temperature dependence of conductivity shows activation energy of 0.23, 0.20 and 0.29 eV for electrolytes containing 0, 5 and 15 wt.% alumina, respectively, when data fitted to the Arrhenius equation. These activation energy values are in good agreement with those determined from dielectric measurements. The result confirms the fact that conductivity is activated by both the mobility and the charge carrier density. The conductivity isotherms demonstrated the existence of two peaks, at 5 and 15 wt.% Al 2 O 3 composition. The highest conductivity values of 2.4 × 10 −4 , 3.3 × 10 −4 and 4.2 × 10 −4 S cm −1 are obtained for the sample with 5 wt.% Al 2 O 3 at 0, 12 and 24°C, respectively, suggesting an enhancement of conductivity compared with that of alumina free samples.

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Section: Resultsmentioning

confidence: 94%

Section: Resultsmentioning

confidence: 97%