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TitleEffect of cyano dipolar groups on the performance of lithium-ion battery electrospun polyimide gel electrolyte membranes
Author(s)Maceiras, A.
Goren, A.
Sencadas, Vítor João Gomes Silva
Costa, C. M.
Vilas, J. L.
Lanceros-Méndez, S.
Leon, L. M.
Battery separator
Gel electrolyte
Lithium-ion battery
Issue date2016
JournalJournal of Electroanalytical Chemistry
CitationMaceiras, A., Goren, A., Sencadas, V., Costa, C. M., Vilas, J. L., Lanceros-Mendez, S., & Leon, L. M. (2016). Effect of cyano dipolar groups on the performance of lithium-ion battery electrospun polyimide gel electrolyte membranes. Journal of Electroanalytical Chemistry, 778, 57-65. doi: 10.1016/j.jelechem.2016.08.014
Abstract(s)Three polyimide membranes (polymer 0CN, copolymers 0CN/2CN (50/50) and polymer 2CN), with and without –CN dipolar groups, have been prepared by electrospinning and evaluated as lithium-ion battery separators. The prepared membranes show average fiber diameters between 0.5 and 1.09 μm and a degree of porosity of ~80%. The thermal stability, uptake, tortuosity and ionic conductivity values are influenced by the presence of the –CN dipolar groups in the polyimide polymer chain. The best battery performance in LFP/Li system is obtained for the 0CN sample, which shows discharge capacity values of 149.7 mAh.g-1, 146.5 mAh.g-1 and 124.6 mAh.g-1 at C/20, C/10 and C/5, respectively. The obtained high solution uptake, ionic conductivity values and rate capability show that these materials are promising candidates for battery separators for rechargeable lithium-ion batteries, when compared to glass microfibre separators.
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Appears in Collections:CDF - FCD - Artigos/Papers (with refereeing)

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