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Electrochemical characterization of poly(ethylene oxide)- zinc chloride system and its application in rechargeable batteries

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dc.contributor.authorPlancha, Maria João
dc.contributor.authorRangel, C. M.
dc.contributor.authorSequeira, C.A.C.
dc.date.accessioned2010-06-30T10:05:18Z
dc.date.available2010-06-30T10:05:18Z
dc.date.issued2008
dc.description.abstractThe system PEOnZnCl2 with n=4-16 was studied in view of its potential application in a solid state rechargeable zinc battery. A.c. conductivity and cationic transference number measurements, in the temperature range 20-150ºC, were performed and the electrochemical stability window was established for the polymer electrolyte with n=4 composition. The ionic conductivity, σ, of this film, follows a VTF behaviour, with an activation energy of 3.3 ± 0.2 kJ mol-1 and σ values were found between 2.50x10-7 S cm-1 at 24ºC and 4.81x10-4 S cm-1 at 145ºC. Acceptable zinc ion transference numbers of 0.36 (medium value) and decomposition voltage values between 3.19V (20ºC) and 1.44V (150ºC) were estimated. Cyclic voltammetric studies using Zn/PEO4ZnCl2/Zn cell indicated reversibility of the Zn/Zn2+ couple at the electrode/electrolyte interface. Several cells Zn(-)/PEO4ZnCl2/Nb2O5(+) were assembled and studied at 55ºC, with several discharge current densities. Results of cell’s discharge profiles, capacity values, charge-discharge cycles behaviour and stability are reported.pt
dc.identifier.citationPlancha M. J.; Rangel, C. M.; Sequeira, C. A. C. Electrochemical characterization of poly(ethylene oxide)- zinc chloride system and its application in rechargeable batteries. In: Book of Abstracts, 11th International Symposium on Polymer Electrolytes, Ofir, Portugal, 2008, p.154pt
dc.identifier.urihttp://hdl.handle.net/10400.9/761
dc.language.isoengpt
dc.titleElectrochemical characterization of poly(ethylene oxide)- zinc chloride system and its application in rechargeable batteriespt
dc.typeconference object
dspace.entity.typePublication
oaire.citation.conferencePlaceOfirpt
oaire.citation.title11th International Symposium on Polymer Electrolytespt
person.familyNameRangel
person.givenNameCarmen M.
person.identifier.ciencia-idAA13-FF7C-9E29
person.identifier.orcid0000-0001-7996-8142
person.identifier.ridD-5477-2011
person.identifier.scopus-author-id7006108156
rcaap.rightsopenAccesspt
rcaap.typeconferenceObjectpt
relation.isAuthorOfPublication804e595a-d539-46a2-ae78-6cadc8ca9457
relation.isAuthorOfPublication.latestForDiscovery804e595a-d539-46a2-ae78-6cadc8ca9457

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