biostudies-literatureUnknown16(4)Nath NKDeveloping multifunctional materials that combine high energy storage capability with efficient electromagnetic interference (EMI) shielding remains a major challenge, as these properties often require conflicting structural features. In this work, we developed novel polymer-based nanocomposites (PNCs) using poly(vinylidene fluoride-<i>co</i>-hexafluoropropylene) (PVDF-HFP) and polymethyl methacrylate (PMMA) as the polymer matrix, reinforced with multi-walled carbon nanotubes (MWCNTs) and 2D Ti₃C₂T _<i>x</i> MXene. This distinctive combination of MXene-MWCNT forms an interconnected 3D conductive network that not only enhances dielectric constant and electrical conductivity but also maximizes absorption dominated EMI shielding through multiple internal reflecRSC advances3543-3553https://www.ebi.ac.uk/biostudies/studies/S-EPMC12809386biostudies-literatureFlexible MXene nanosheet/multiwall carbon nanotube-reinforced poly (vinylidene fluoride-hexafluoropropylene)-polymethyl methacrylate composites for energy storage and EMI shielding.PMC12809386Parida BNDas DNath NKParashar SKSParida RNayak NCfalseFlexible MXene nanosheet/multiwall carbon nanotube-reinforced poly (vinylidene fluoride-hexafluoropropylene)-polymethyl methacrylate composites for energy storage and EMI shielding.Developing multifunctional materials that combine high energy storage capability with efficient electromagnetic interference (EMI) shielding remains a major challenge, as these properties often require conflicting structural features. In this work, we developed novel polymer-based nanocomposites (PNCs) using poly(vinylidene fluoride-<i>co</i>-hexafluoropropylene) (PVDF-HFP) and polymethyl methacrylate (PMMA) as the polymer matrix, reinforced with multi-walled carbon nanotubes (MWCNTs) and 2D Ti₃C₂T _<i>x</i> MXene. This distinctive combination of MXene-MWCNT forms an interconnected 3D conductive network that not only enhances dielectric constant and electrical conductivity but also maximizes absorption dominated EMI shielding through multiple internal reflec2026-01-01T00:00:00Z2026 Jan2026-06-06T15:57:10.425Z2026-06-02T03:10:36.671ZS-EPMC128093864155081310.1039/d5ra09486k