2015
DOI: 10.7763/ijcea.2015.v6.474
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Effects of the Addition of LiCF3SO3 Salt on the Conductivity, Thermal and Mechanical Properties of PEO-LiCF3SO3 Solid Polymer Electrolyte

Abstract: Abstract-Solid polymer electrolyte for lithium ion batteries consisting of polyethylene oxide (PEO) and lithium trifluoromethanesulfonate (LiCF 3 SO 3 ) was prepared by a ball milling method followed by a hot pressing process. Various contents of Li salts (5, 10, 15 and 20 wt %) were studied. The samples were investigated for crystallinity and glass transition temperature by DSC and ionic conductivity was measured by the impedance. XRD patterns confirmed the degree of crystallinity of solid polymer electrolyte… Show more

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Cited by 14 publications
(10 citation statements)
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“…As the lithium salt interacts preferentially with PEO, the addition of the HNBR elastomer increases the effective content of LiTFSI in the PEO phase (Table ), which decreases the degree of crystallinity of these SPE blends thanks to the plasticizing effect of the LiTFSI salt (Figure ). This result was validated by DSC on blends with and without LiTFSI (Figures S7 and S8, Supporting Information). DSC results for blends without a salt show a constant degree of crystallinity of the PEO phase (melting enthalpy normalized to the ratio of PEO in each blend), in contrast to the DSC results obtained for blends with LiTFSI.…”
Section: Resultssupporting
confidence: 59%
“…As the lithium salt interacts preferentially with PEO, the addition of the HNBR elastomer increases the effective content of LiTFSI in the PEO phase (Table ), which decreases the degree of crystallinity of these SPE blends thanks to the plasticizing effect of the LiTFSI salt (Figure ). This result was validated by DSC on blends with and without LiTFSI (Figures S7 and S8, Supporting Information). DSC results for blends without a salt show a constant degree of crystallinity of the PEO phase (melting enthalpy normalized to the ratio of PEO in each blend), in contrast to the DSC results obtained for blends with LiTFSI.…”
Section: Resultssupporting
confidence: 59%
“…The highest conducting sample (S30 sample) is observed to have the lowest mechanical strength of 15.43 MPa compared to other samples. This may be due to the salt's inhibition of crystallization, leading to the rise in the SPE's amorphousness observed in the XRD analysis (Klongkan and Pumchusak 2015).…”
Section: Mechanical Propertiesmentioning
confidence: 99%
“…This circumstance can be attributed to the increase in the segmental motion of the PEO polymer chain. Klongkan and Pumchusak 26 reported that the addition of LiCF 3 SO 3 salts from 5 wt.% to 20 wt.% in the PEO host polymer decreased the glasstransition temperature (T g ) of the PEO-based electrolyte system from 213.29 K to 207.02 K. At the same time, the amorphous properties of the electrolyte increased as they observe a decrease in the crystallinity level of the PEO-LiCF 3 SO 3 electrolyte system due to the increase in free volume. 26 In this work, the presence of high salt concentration in the D5 electrolyte improved the flexibility of the PEO polymer segment.…”
Section: Resultsmentioning
confidence: 99%