The dielectric properties and energy storage density of poly(vinylidene fluoride-co-hexafluoropropylene) were enhanced by the surface-functionalized relaxor ferroelectric ceramic Pb(Mg1/3Nb2/3)O3–PbTiO3.
Defect engineering by acceptor doping affects the dipolar state in relaxor ferroelectrics, resulting in a tailored electrocaloric response.