Please use this identifier to cite or link to this item: https://doi.org/10.1063/1.4858397
Title: Poly(vinylidene fluoride-co-hexafluoropropylene)-graft-poly(dopamine methacrylamide) copolymers: A nonlinear dielectric material for high energy density storage
Authors: Rahimabady, M.
Xu, L.Q.
Arabnejad, S.
Yao, K.
Lu, L. 
Shim, V.P.W. 
Gee Neoh, K. 
Kang, E.-T. 
Issue Date: 23-Dec-2013
Source: Rahimabady, M., Xu, L.Q., Arabnejad, S., Yao, K., Lu, L., Shim, V.P.W., Gee Neoh, K., Kang, E.-T. (2013-12-23). Poly(vinylidene fluoride-co-hexafluoropropylene)-graft-poly(dopamine methacrylamide) copolymers: A nonlinear dielectric material for high energy density storage. Applied Physics Letters 103 (26) : -. ScholarBank@NUS Repository. https://doi.org/10.1063/1.4858397
Abstract: A nonlinear dielectric poly(vinylidene fluoride-co-hexafluoropropylene)- graft-poly(dopamine methacrylamide) [P(VDF-HFP)-g-PDMA] graft copolymer with ultra-high energy density of 33 J/cm3 was obtained by thermally initiated radical graft polymerization. It was observed that the dielectric constant of the graft copolymer films was 63% higher than that of P(VDF-HFP), with a large dielectric breakdown strength (>850 MV/m). Theoretical analyses and experimental measurements showed that the significant improvement in the electric polarization was attributed to the introduction of the highly polarizable hydroxyl groups in the PDMA side chains, and the large breakdown strength arose from the strong adhesion bonding of the catechol-containing graft copolymer to the metal electrode. © 2013 AIP Publishing LLC.
Source Title: Applied Physics Letters
URI: http://scholarbank.nus.edu.sg/handle/10635/85557
ISSN: 00036951
DOI: 10.1063/1.4858397
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