{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,21]],"date-time":"2026-09-21T19:33:28Z","timestamp":1790019208236,"version":"4.0.1"},"reference-count":70,"publisher":"MDPI AG","issue":"18","license":[{"start":{"date-parts":[[2025,9,17]],"date-time":"2025-09-17T00:00:00Z","timestamp":1758067200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"\u201cMEDICUS\u201d, of the University of Patras"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Polymers"],"abstract":"<jats:p>Polymer-based hybrid composites have emerged as promising platforms for multifunctional energy applications, combining structural versatility with tunable dielectric behavior. In this study, synthesized [Fe(bpy)3]SO4; (tris(2,2\u2032-bipyridine)iron(II) sulfate) coordination compound was incorporated into a green epoxy resin matrix to fabricate nanocomposites aimed at enhancing dielectric permittivity (\u03b5\u2032), piezoelectric coefficient (d33, pC\/N), energy-storage efficiency (nrel, %), and mechanical strength (\u03c3, MPa). The integration of the Fe(II) complex via Scanning Electron Microscopy (SEM) confirmed a homogeneous dispersion within the matrix. Broadband Dielectric Spectroscopy (BDS) revealed the presence of three relaxation processes in the spectra of the tested systems, demonstrating enhanced dielectric permittivity with increasing Fe(II) content. Under progressively shorter relaxation times (\u03c4, s), key processes such as interfacial polarization, the polymer matrix\u2019s transition from a glassy to a rubbery state, and the dynamic reorganization of polar side groups along the polymer backbone are activated. The ability to store and retrieve electric energy was confirmed by varying filler content under direct current (dc) conditions. The nanocomposite with 10 phr (mass parts\/100 mass parts of resin) filler achieved a piezoelectric coefficient of d33 = 5.1 pC\/N, an energy-storage efficiency of nrel = 44%, and a tensile strength of \u03c3 = 55.5 MPa, all of which surpass values reported for conventional epoxy-based composites. These results confirm the ability of the system to store and retrieve electric energy under direct current (dc) fields, while maintaining mechanical robustness and thermal stability due to synergistic interactions between the epoxy matrix and the Fe(II) complex. The multifunctional behavior of the composites underscores their potential as advanced materials for integrated dielectric, piezoelectric, and energy storage and harvesting applications.<\/jats:p>","DOI":"10.3390\/polym17182509","type":"journal-article","created":{"date-parts":[[2025,9,17]],"date-time":"2025-09-17T13:03:02Z","timestamp":1758114182000},"page":"2509","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Synthesis and Integration of an Fe(II) Coordination Compound into Green Resin Matrices for Multifunctional Dielectric, Piezoelectric, Energy Harvesting, and Storage Applications"],"prefix":"10.3390","volume":"17","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4915-9779","authenticated-orcid":false,"given":"Anastasios C.","family":"Patsidis","sequence":"first","affiliation":[{"name":"Department of Materials, School of Natural Sciences, University of Patras, 26504 Patras, Greece"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ioanna Th.","family":"Papageorgiou","sequence":"additional","affiliation":[{"name":"Department of Chemistry, School of Natural Sciences, University of Patras, 26504 Patras, Greece"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0985-2579","authenticated-orcid":false,"given":"Zoi G.","family":"Lada","sequence":"additional","affiliation":[{"name":"Department of Chemistry, School of Natural Sciences, University of Patras, 26504 Patras, Greece"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2025,9,17]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"563","DOI":"10.3144\/expresspolymlett.2023.41","article-title":"Polymer nanocomposites and transport (in their) properties","volume":"17","author":"Psarras","year":"2023","journal-title":"Express Polym. Lett."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"308","DOI":"10.1016\/j.compositesb.2012.04.012","article-title":"Epoxy clay nanocomposites\u2014Processing, properties and applications: A review","volume":"45","author":"Azeez","year":"2013","journal-title":"Compos. Part B Eng."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"230","DOI":"10.1016\/j.pmatsci.2018.05.001","article-title":"Polyurethane nanocomposite based gas barrier films, membranes and coatings: A review on synthesis, characterization and potential applications","volume":"97","author":"Joshi","year":"2018","journal-title":"Prog. Mater. Sci."},{"key":"ref_4","doi-asserted-by":"crossref","unstructured":"Kumar, V., and Alam, M.N. (2025). Multifunctional Polymer Composite Materials. Polymers, 17.","DOI":"10.3390\/polym17121636"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"108","DOI":"10.1016\/j.compositesb.2015.05.027","article-title":"Multifunctional polymer nanocomposites with enhanced mechanical and anti-microbial properties","volume":"80","author":"Quaresimin","year":"2015","journal-title":"Compos. Part B Eng."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"225","DOI":"10.1007\/s42114-025-01225-0","article-title":"Recent progress of polymer-based piezoelectric nanogenerators","volume":"8","author":"Wu","year":"2025","journal-title":"Adv. Compos. Hybrid Mater."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"104837","DOI":"10.1016\/j.isci.2022.104837","article-title":"High-energy-density polymer dielectrics via compositional and structural tailoring for electrical energy storage","volume":"25","author":"Cheng","year":"2022","journal-title":"iScience"},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"2416314","DOI":"10.1002\/adma.202416314","article-title":"Ultra-Broadband Perfect Absorbers Based on Biomimetic Metamaterials with Dual Coupling Gradient Resonators","volume":"37","author":"Ren","year":"2025","journal-title":"Adv. Mater."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"111946","DOI":"10.1016\/j.compositesb.2024.111946","article-title":"Frequency insensitive electromagnetic absorption core-shell sandwich structure with excellent electromagnetic damage tolerance","volume":"289","author":"Zhao","year":"2025","journal-title":"Compos. Part B Eng."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"2412744","DOI":"10.1002\/smll.202412744","article-title":"Ultra-Bandwidth Microwave Absorption and Low Angle Sensitivity in Dual-Network Aerogels with Dual-Scale Pores","volume":"21","author":"Wang","year":"2025","journal-title":"Small"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"151","DOI":"10.1049\/hve.2016.0063","article-title":"Energy storage and harvesting in BaTiO3\/epoxy nanodielectrics","volume":"1","author":"Manika","year":"2016","journal-title":"High Volt."},{"key":"ref_12","doi-asserted-by":"crossref","unstructured":"Sanida, A., Stavropoulos, S.G., Speliotis, T., and Psarras, G.C. (2019). Investigating the Effect of Zn Ferrite Nanoparticles on the Thermomechanical, Dielectric and Magnetic Properties of Polymer Nanocomposites. Materials, 12.","DOI":"10.3390\/ma12183015"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"52367","DOI":"10.1002\/app.52367","article-title":"Preparation and application of dielectric polymers with high permittivity and low energy loss: A mini review","volume":"139","author":"Qiu","year":"2022","journal-title":"J. Appl. Polym. Sci."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"6369","DOI":"10.1039\/D0CS00765J","article-title":"Dielectric polymers for high-temperature capacitive energy storage","volume":"50","author":"Li","year":"2021","journal-title":"Chem. Soc. Rev."},{"key":"ref_15","doi-asserted-by":"crossref","unstructured":"Cao, L., Xi, R., Zhou, C., He, G., Yang, F., Xu, L., and Li, H. (2024). Polymer Capacitor Films with Nanoscale Coatings for Dielectric Energy Storage: A Review. Coatings, 14.","DOI":"10.3390\/coatings14091193"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"240701","DOI":"10.1063\/5.0123263","article-title":"Review of ferrite-based microwave-absorbing materials: Origin, synthesis, morphological effects, dielectric\/magnetic properties, composites, absorption mechanisms, and optimization","volume":"132","author":"Aherrao","year":"2022","journal-title":"J. Appl. Phys."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"29","DOI":"10.1016\/j.ensm.2021.10.010","article-title":"Advanced dielectric polymers for energy storage","volume":"44","author":"Wu","year":"2022","journal-title":"Energy Storage Mater."},{"key":"ref_18","doi-asserted-by":"crossref","unstructured":"Kostishin, V.G., Isaev, I.M., and Salogub, D.V. (2024). Radio-Absorbing Magnetic Polymer Composites Based on Spinel Ferrites: A Review. Polymers, 16.","DOI":"10.3390\/polym16071003"},{"key":"ref_19","doi-asserted-by":"crossref","unstructured":"Wang, Q., Che, J., Wu, W., Hu, Z., Liu, X., Ren, T., Chen, Y., and Zhang, J. (2023). Contributing Factors of Dielectric Properties for Polymer Matrix Composites. Polymers, 15.","DOI":"10.3390\/polym15030590"},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"134","DOI":"10.1039\/C8SC04025G","article-title":"Insights into the excited state dynamics of Fe(ii) polypyridyl complexes from variable-temperature ultrafast spectroscopy","volume":"10","author":"Carey","year":"2019","journal-title":"Chem. Sci."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"5864","DOI":"10.1002\/er.7527","article-title":"Isopropyl alcohol and copper hexacyanoferrate boost performance of the iron tris-bipyridine catholyte for near-neutral pH aqueous redox flow batteries","volume":"46","author":"Bui","year":"2022","journal-title":"Int. J. Energy Res."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"9541","DOI":"10.1021\/acs.inorgchem.2c00640","article-title":"Dimerization of Fe(III)(bpy)3 in Aqueous Solutions","volume":"61","author":"Holubowitch","year":"2022","journal-title":"Inorg. Chem."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"107920","DOI":"10.1016\/j.microc.2022.107920","article-title":"Spectroelectrochemistry of next-generation redox flow battery electrolytes: A survey of active species from four representative classes","volume":"182","author":"Holubowitch","year":"2022","journal-title":"Microchem. J."},{"key":"ref_24","doi-asserted-by":"crossref","unstructured":"Patsidis, A.C., and Souliotis, M. (2023). End-Of-Use Fly Ash as an Effective Reinforcing Filler in Green Polymer Composites. Polymers, 15.","DOI":"10.3390\/polym15163418"},{"key":"ref_25","doi-asserted-by":"crossref","unstructured":"Gioti, S., Sanida, A., Mathioudakis, G.N., Patsidis, A.C., Speliotis, T., and Psarras, G.C. (2022). Multitasking Performance of Fe3O4\/BaTiO3\/Epoxy Resin Hybrid Nanocomposites. Materials, 15.","DOI":"10.3390\/ma15051784"},{"key":"ref_26","doi-asserted-by":"crossref","unstructured":"Manika, G.C., Andrikopoulos, K.S., and Psarras, G.C. (2020). On the Ferroelectric to Paraelectric Structural Transition of BaTiO3 Micro-\/Nanoparticles and Their Epoxy Nanocomposites. Molecules, 25.","DOI":"10.3390\/molecules25112686"},{"key":"ref_27","unstructured":"(2022). Standard Test Methods for AC Loss Characteristics and Permittivity (Dielectric Constant) of Solid Electrical Insulation (Standard No. ASTM D150-18)."},{"key":"ref_28","unstructured":"(2022). Standard Test Method for Water Absorption of Plastics (Standard No. ASTM D570-22)."},{"key":"ref_29","unstructured":"(2021). Standard Test Methods for DC Resistance or Conductance of Insulating Materials (Standard No. ASTM D257-14(2021)e1)."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"749","DOI":"10.3144\/expresspolymlett.2019.63","article-title":"Barium titanate\/epoxy resin composite nanodielectrics as compact capacitive energy storing systems","volume":"13","author":"Manika","year":"2019","journal-title":"Express Polym. Lett."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"1545","DOI":"10.1016\/j.compositesa.2005.11.004","article-title":"Hopping conductivity in polymer matrix\u2013metal particles composites","volume":"37","author":"Psarras","year":"2006","journal-title":"Compos. Part A Appl. Sci. Manuf."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"R57","DOI":"10.1088\/0022-3727\/32\/14\/201","article-title":"Dielectric relaxation in solids","volume":"32","author":"Andrew","year":"1999","journal-title":"J. Phys. D Appl. Phys."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"046501","DOI":"10.1088\/0034-4885\/72\/4\/046501","article-title":"Fundamental questions relating to ion conduction in disordered solids","volume":"72","author":"Dyre","year":"2009","journal-title":"Rep. Prog. Phys."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"157","DOI":"10.1016\/j.compscitech.2006.07.025","article-title":"Polyurethane latex\/water dispersible boehmite alumina nanocomposites: Thermal, mechanical and dielectrical properties","volume":"67","author":"Gatos","year":"2007","journal-title":"Compos. Sci. Technol."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"2027","DOI":"10.1023\/A:1004398514901","article-title":"Electric modulus and interfacial polarization in composite polymeric systems","volume":"33","author":"Tsangaris","year":"1998","journal-title":"J. Mater. Sci."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"217","DOI":"10.1140\/epje\/i2001-10088-4","article-title":"Some relevant parameters affecting the glass transition of supported ultra-thin polymer films","volume":"8","author":"Grohens","year":"2002","journal-title":"Eur. Phys. J. E"},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"145","DOI":"10.1140\/epje\/i2001-10073-y","article-title":"Molecular dynamics in thin films of isotactic poly(methyl methacrylate)","volume":"8","author":"Hartmann","year":"2002","journal-title":"Eur. Phys. J. E"},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"27","DOI":"10.1007\/s10973-013-3510-8","article-title":"Dynamic electrical thermal analysis on zinc oxide\/epoxy resin nanodielectrics","volume":"116","author":"Mathioudakis","year":"2014","journal-title":"J. Therm. Anal. Calorim."},{"key":"ref_39","unstructured":"Dang, Z.-M. (2018). Fundamentals of Dielectric Theories. Dielectric Polymer Materials for High-Density Energy Storage, William Andrew Publishing."},{"key":"ref_40","doi-asserted-by":"crossref","unstructured":"Patsidis, A.C., Koufakis, E.I., Mathioudakis, G.N., Vryonis, O., and Psarras, G.C. (2024). Development, Dielectric Response, and Functionality of ZnTiO3\/BaTiO3\/Epoxy Resin Hybrid Nanocomposites. J. Compos. Sci., 8.","DOI":"10.3390\/jcs8060225"},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"660","DOI":"10.1016\/j.pmatsci.2011.08.001","article-title":"Fundamentals, processes and applications of high-permittivity polymer\u2013matrix composites","volume":"57","author":"Dang","year":"2012","journal-title":"Prog. Mater. Sci."},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"101207","DOI":"10.1016\/j.pmatsci.2023.101207","article-title":"Recent progress in polymer dielectric energy storage: From film fabrication and modification to capacitor performance and application","volume":"140","author":"Zhang","year":"2023","journal-title":"Prog. Mater. Sci."},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"739","DOI":"10.1016\/j.joule.2017.08.018","article-title":"Redox-Active Polymers for Energy Storage Nanoarchitectonics","volume":"1","author":"Kim","year":"2017","journal-title":"Joule"},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"100865","DOI":"10.1016\/j.mser.2024.100865","article-title":"Redox-active molecules for aqueous electrolytes of energy storage devices: A review on fundamental aspects, current progress, and prospects","volume":"161","author":"Chen","year":"2024","journal-title":"Mater. Sci. Eng. R Rep."},{"key":"ref_45","doi-asserted-by":"crossref","unstructured":"Sundar, U., Lao, Z., and Cook-Chennault, K. (2019). Investigation of Piezoelectricity and Resistivity of Surface Modified Barium Titanate Nanocomposites. Polymers, 11.","DOI":"10.3390\/polym11122123"},{"key":"ref_46","doi-asserted-by":"crossref","first-page":"015703","DOI":"10.1088\/2053-1591\/ab5bb3","article-title":"The effect of the intrinsic electrical matrix conductivity on the piezoelectric charge constant of piezoelectric composites","volume":"7","author":"Stuber","year":"2020","journal-title":"Mater. Res. Express"},{"key":"ref_47","doi-asserted-by":"crossref","unstructured":"Mystiridou, E., Patsidis, A.C., and Bouropoulos, N. (2021). Development and Characterization of 3D Printed Multifunctional Bioscaffolds Based on PLA\/PCL\/HAp\/BaTiO3 Composites. Appl. Sci., 11.","DOI":"10.3390\/app11094253"},{"key":"ref_48","doi-asserted-by":"crossref","first-page":"3079","DOI":"10.1016\/j.carbon.2009.07.020","article-title":"Development and characterization of PEEK\/carbon nanotube composites","volume":"47","author":"Naffakh","year":"2009","journal-title":"Carbon"},{"key":"ref_49","doi-asserted-by":"crossref","unstructured":"You, L., Liu, B., Hua, H., Jiang, H., Yin, C., and Wen, F. (2023). Energy Storage Performance of Polymer-Based Dielectric Composites with Two-Dimensional Fillers. Nanomaterials, 13.","DOI":"10.3390\/nano13212842"},{"key":"ref_50","doi-asserted-by":"crossref","first-page":"1907227","DOI":"10.1002\/adma.201907227","article-title":"Negatively Charged Nanosheets Significantly Enhance the Energy-Storage Capability of Polymer-Based Nanocomposites","volume":"32","author":"Bao","year":"2020","journal-title":"Adv. Mater."},{"key":"ref_51","doi-asserted-by":"crossref","first-page":"7145","DOI":"10.1016\/j.ceramint.2021.11.274","article-title":"Two-dimensional SrTiO3 platelets induced the improvement of energy storage performance in polymer composite films at low electric fields","volume":"48","author":"Zhang","year":"2022","journal-title":"Ceram. Int."},{"key":"ref_52","doi-asserted-by":"crossref","first-page":"609","DOI":"10.1016\/j.scib.2021.10.011","article-title":"Chemical adsorption on 2D dielectric nanosheets for matrix free nanocomposites with ultrahigh electrical energy storage","volume":"67","author":"Chen","year":"2022","journal-title":"Sci. Bull."},{"key":"ref_53","doi-asserted-by":"crossref","first-page":"587","DOI":"10.1016\/j.nanoen.2017.09.004","article-title":"NaNbO3 two-dimensional platelets induced highly energy storage density in trilayered architecture composites","volume":"40","author":"Pan","year":"2017","journal-title":"Nano Energy"},{"key":"ref_54","doi-asserted-by":"crossref","first-page":"21428","DOI":"10.1016\/j.ceramint.2018.08.202","article-title":"Improved breakdown strength and energy density of Al2O3\/nano-ZrO2 composite films via enhanced interfacial repairing behavior","volume":"44","author":"Li","year":"2018","journal-title":"Ceram. Int."},{"key":"ref_55","doi-asserted-by":"crossref","first-page":"107912","DOI":"10.1016\/j.compscitech.2019.107912","article-title":"Significantly improved breakdown strength and energy density of tri-layered polymer nanocomposites with optimized graphene oxide","volume":"186","author":"Chen","year":"2020","journal-title":"Compos. Sci. Technol."},{"key":"ref_56","doi-asserted-by":"crossref","first-page":"11144","DOI":"10.1039\/C8TC04510K","article-title":"Enhanced dielectric property and energy density in poly(vinylidene fluoride-chlorotrifluoroethylene) nanocomposite incorporated with graphene functionalized with hyperbranched polyethylene-graft-poly(trifluoroethyl methacrylate) copolymer","volume":"6","author":"Ye","year":"2018","journal-title":"J. Mater. Chem. C"},{"key":"ref_57","doi-asserted-by":"crossref","first-page":"13345","DOI":"10.1021\/acs.langmuir.3c02055","article-title":"Amplified Dielectric Properties of PVDF\u2013HFP\/SrTiO3 Nanocomposites for a Flexible Film Capacitor","volume":"39","author":"Panda","year":"2023","journal-title":"Langmuir"},{"key":"ref_58","doi-asserted-by":"crossref","first-page":"112","DOI":"10.1016\/j.compscitech.2018.02.015","article-title":"Enhanced dielectric tunability and energy storage properties of plate-like Ba0.6Sr0.4TiO3\/poly(vinylidene fluoride) composites through texture arrangement","volume":"158","author":"Wang","year":"2018","journal-title":"Compos. Sci. Technol."},{"key":"ref_59","doi-asserted-by":"crossref","first-page":"15270","DOI":"10.1016\/j.ceramint.2020.03.066","article-title":"Energy storage performance in polymer dielectrics by introducing 2D SrBi4Ti4O15 nanosheets","volume":"46","author":"Lin","year":"2020","journal-title":"Ceram. Int."},{"key":"ref_60","doi-asserted-by":"crossref","first-page":"10546","DOI":"10.1039\/C9NR00874H","article-title":"Simultaneously enhanced discharge energy density and efficiency in nanocomposite film capacitors utilizing two-dimensional NaNbO3@Al2O3 platelets","volume":"11","author":"Pan","year":"2019","journal-title":"Nanoscale"},{"key":"ref_61","doi-asserted-by":"crossref","first-page":"1701088","DOI":"10.1002\/admi.201701088","article-title":"Nanocomposite Capacitors with Significantly Enhanced Energy Density and Breakdown Strength Utilizing a Small Loading of Monolayer Titania","volume":"5","author":"Wen","year":"2018","journal-title":"Adv. Mater. Interfaces"},{"key":"ref_62","doi-asserted-by":"crossref","first-page":"605","DOI":"10.1016\/j.ensm.2022.11.009","article-title":"Constructing bidirectional-matched interface between polymer and 2D nanosheets for enhancing energy storage performance of the composites","volume":"54","author":"Li","year":"2023","journal-title":"Energy Storage Mater."},{"key":"ref_63","doi-asserted-by":"crossref","first-page":"7952","DOI":"10.1021\/acsaem.0c01317","article-title":"Improving Energy Storage Density and Efficiency of Polymer Dielectrics by Adding Trace Biomimetic Lysozyme-Modified Boron Nitride","volume":"3","author":"Xie","year":"2020","journal-title":"ACS Appl. Energy Mater."},{"key":"ref_64","doi-asserted-by":"crossref","first-page":"132676","DOI":"10.1016\/j.cej.2021.132676","article-title":"Enhanced energy storage performance of polymer nanocomposites using hybrid 2D ZnO@MoS2 semiconductive nano-fillers","volume":"430","author":"Wen","year":"2022","journal-title":"Chem. Eng. J."},{"key":"ref_65","doi-asserted-by":"crossref","first-page":"182","DOI":"10.1007\/s10965-022-03047-w","article-title":"Influence of organic Na+-MMT on the dielectric and energy storage properties of maleic anhydride-functionalized polypropylene nanocomposites","volume":"29","author":"Hu","year":"2022","journal-title":"J. Polym. Res."},{"key":"ref_66","doi-asserted-by":"crossref","first-page":"2102221","DOI":"10.1002\/advs.202102221","article-title":"Recent Advances in Multilayer-Structure Dielectrics for Energy Storage Application","volume":"8","author":"Feng","year":"2021","journal-title":"Adv. Sci."},{"key":"ref_67","doi-asserted-by":"crossref","first-page":"2100079","DOI":"10.1002\/mame.202100079","article-title":"2D MoS2 Nanosheet-Based Polyimide Nanocomposite with High Energy Density for High Temperature Capacitor Applications","volume":"306","author":"Li","year":"2021","journal-title":"Macromol. Mater. Eng."},{"key":"ref_68","doi-asserted-by":"crossref","first-page":"215703","DOI":"10.1088\/1361-6528\/ac5543","article-title":"One-pot synthesis of hexafluorobutyl acrylate hyperbranched copolymer for graphene\/poly(vinylidenefluoride-trifluoroethylene- chlorofluoroethylene) dielectric composite","volume":"33","author":"Jiang","year":"2022","journal-title":"Nanotechnology"},{"key":"ref_69","doi-asserted-by":"crossref","first-page":"231415","DOI":"10.1016\/j.jpowsour.2022.231415","article-title":"Enhanced breakdown strength and energy density over a broad temperature range in polyimide dielectrics using oxidized MXenes filler","volume":"535","author":"Yu","year":"2022","journal-title":"J. Power Sources"},{"key":"ref_70","doi-asserted-by":"crossref","first-page":"139","DOI":"10.1016\/j.compscitech.2017.02.006","article-title":"Poly(methyl methacrylate)\/boron nitride nanocomposites with enhanced energy density as high temperature dielectrics","volume":"142","author":"Liu","year":"2017","journal-title":"Compos. Sci. Technol."}],"container-title":["Polymers"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2073-4360\/17\/18\/2509\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,9]],"date-time":"2025-10-09T18:47:05Z","timestamp":1760035625000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2073-4360\/17\/18\/2509"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,9,17]]},"references-count":70,"journal-issue":{"issue":"18","published-online":{"date-parts":[[2025,9]]}},"alternative-id":["polym17182509"],"URL":"https:\/\/doi.org\/10.3390\/polym17182509","relation":{},"ISSN":["2073-4360"],"issn-type":[{"value":"2073-4360","type":"electronic"}],"subject":[],"published":{"date-parts":[[2025,9,17]]}}}