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      Cross-Linked Poly(vinylidene fluoride- co-hexafluoropropene) (PVDF- co-HFP) Gel Polymer Electrolyte for Flexible Li-Ion Battery Integrated with Organic Light Emitting Diode (OLED)

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          Abstract

          Here, we fabricate poly(vinylidene fluoride- co-hexafluoropropene) (PVDF- co-HFP) by electrospinning for a gel polymer electrolyte (GPE) for use in flexible Li-ion batteries (LIBs). As a solvent, we use N-methyl-2-pyrrolidone (NMP), which helps produce the cross-linked morphology of PVDF- co-HFP separator, owing to its low volatility. The cross-linked PVDF- co-HFP separator shows an uptake rate higher than that of a commercialized polypropylene (PP) separator. Moreover, the PVDF- co-HFP separator shows an ionic conductivity of 2.3 × 10 −3 S/cm at room temperature, comparable with previously reported values. An LIB full-cell assembled with the PVDF- co-HFP-based GPE shows capacities higher than its counterpart with the commercialized PP separator, confirming that the cross-linked PVDF- co-HFP separator provides highly efficient ionic conducting pathways. In addition, we integrate a flexible LIB cell using the PVDF- co-HFP GPE with a flexible organic light emitting diode (OLED), demonstrating a fully flexible unit of LIB and OLED.

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          Progress in flexible lithium batteries and future prospects

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            Bendable inorganic thin-film battery for fully flexible electronic systems.

            High-performance flexible power sources have gained attention, as they enable the realization of next-generation bendable, implantable, and wearable electronic systems. Although the rechargeable lithium-ion battery (LIB) has been regarded as a strong candidate for a high-performance flexible energy source, compliant electrodes for bendable LIBs are restricted to only a few materials, and their performance has not been sufficient for them to be applied to flexible consumer electronics including rollable displays. In this paper, we present a flexible thin-film LIB developed using the universal transfer approach, which enables the realization of diverse flexible LIBs regardless of electrode chemistry. Moreover, it can form high-temperature (HT) annealed electrodes on polymer substrates for high-performance LIBs. The bendable LIB is then integrated with a flexible light-emitting diode (LED), which makes an all-in-one flexible electronic system. The outstanding battery performance is explored and well supported by finite element analysis (FEA) simulation.
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              Electrospinning: designed architectures for energy conversion and storage devices

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                Author and article information

                Journal
                Materials (Basel)
                Materials (Basel)
                materials
                Materials
                MDPI
                1996-1944
                02 April 2018
                April 2018
                : 11
                : 4
                : 543
                Affiliations
                [1 ]School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Korea; hwan20@ 123456skku.edu (I.K.); hlee@ 123456skku.edu (H.-J.L.)
                [2 ]Department of Applied Nano Mechanics, Korea Institute of Machinery and Materials (KIMM), Daejeon 305-343, Korea; kwek14@ 123456kimm.re.kr
                [3 ]SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University (SKKU), Suwon 16419, Korea; kbsgod2012@ 123456gmail.com (B.S.K.); hokchung@ 123456skku.edu (H.K.C.)
                [4 ]School of Chemical Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Korea; sungmcho@ 123456skku.edu
                [5 ]Center for Integrated Nanostructure Physics (CINAP), Institute for Basic Science (IBS), Suwon 16419, Korea; hoaithuongluu@ 123456gmail.com
                [6 ]Department of Energy Science, Sungkyunkwan University (SKKU), Suwon 16419, Korea
                Author notes
                [* ]Correspondence: hyun@ 123456kimm.re.kr (S.H.); chiwonkang@ 123456skku.edu (C.K.); Tel.: +82-42-868-7981 (S.H.); +82-31-299-4735 (C.K.)
                [†]

                These co-first authors contributed equally to this work.

                Article
                materials-11-00543
                10.3390/ma11040543
                5951427
                29614800
                9c939316-3d3e-4f43-8d53-787848131313
                © 2018 by the authors.

                Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ( http://creativecommons.org/licenses/by/4.0/).

                History
                : 06 March 2018
                : 28 March 2018
                Categories
                Article

                cross-linked poly(vinylidene fluoride-co-hexafluoropropene) (pvdf-co-hfp),gel polymer electrolyte (gpe),electrospinning,n-methyl-2-pyrrolidone (nmp),ionic conductivity,flexible li-ion batteries,organic light emitting diode (oled)

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