Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/38788
Título: | Effect of the degree of porosity on the performance of poly(vinylidene fluoride-trifluoroethylene)/poly(ethylene oxide) blend membranes for lithium-ion battery separators |
Autor(es): | Gören, Attila Costa, Carlos Miguel Silva Tamaño Machiavello, M. N. Cíntora-Juárez, D. Pereira, Eduardo Jorge Nunes Tirado, J. L. Silva, Maria Manuela Gomez Ribelles, J. L. Lanceros-Méndez, S. |
Palavras-chave: | PVDF-TrFE PEO Battery separator Lithium-ion battery application |
Data: | 2015 |
Editora: | Elsevier 1 |
Revista: | Solid State Ionics |
Citação: | Gören, A., Costa, C. M., Tamaño Machiavello, M. N., Cíntora-Juárez, D., Nunes-Pereira, J., Tirado, J. L., . . . Lanceros-Méndez, S. (2015). Effect of the degree of porosity on the performance of poly(vinylidene fluoride-trifluoroethylene)/poly(ethylene oxide) blend membranes for lithium-ion battery separators. Solid State Ionics, 280, 1-9. doi: 10.1016/j.ssi.2015.08.003 |
Resumo(s): | Porous polymer membranes based on poly(vinylidene fluoride-trifluoroethylene)/poly(ethylene oxide) copolymers, P(VDF-TrFE)/PEO, are prepared through the, from partial to total, elimination of PEO, leading to interconnected micropores in the polymer blends. Electrolyte uptake, thermal and mechanical properties depend on the amount of PEO present in the polymer blend. Further, the degree of crystallinity of PEO and the elastic modulus (E´) of the polymer blend decrease with increasing PEO removal. Electrical properties of the polymer blend membranes are influenced by the porosity and are dominated by diffusion. The temperature dependence of ionic conductivity follows the Arrhenius behavior. It is the highest for the membranes with a volume fraction of pores of 44% (i.e, 90% PEO removal), reaching a value of 0.54 mS.cm-1 at room temperature. Battery performance was determined by assembling Li/C-LiFePO4 swagelok cells. The polymer blends with 90% PEO removal exhibit rate (124 mAhg-1 at C/5 and 47 mAhg-1 at 2C) and cycling capabilities suitable for lithium ion battery applications. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/38788 |
DOI: | 10.1016/j.ssi.2015.08.003 |
ISSN: | 0167-2738 |
Arbitragem científica: | yes |
Acesso: | Acesso restrito UMinho |
Aparece nas coleções: | CDF - FCD - Artigos/Papers (with refereeing) CDQuim - Artigos (Papers) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Goren_II_2015.pdf Acesso restrito! | 761,64 kB | Adobe PDF | Ver/Abrir |