Ultrahigh-energy-density dielectric materials from ferroelectric polymer/glucose all-organic composites with a cross-linking network of hydrogen bonds

Controllable synthesis and structural design of novel all-organic polymers toward high energy storage dielectrics

“… Wang R. et al (2022) reported a kind of all-organic ultrahigh-energy-density dielectric composites materials consisting of ferroelectric polymer P(VDF- HFP) and glucose, exhibiting record U e (37.7 J/cm 3 ) that outperforms the state-of-the-art dielectric polymer composites. The glucose molecules rich in -OH groups are found to facilitate the formation of a physically cross-linking network of hydrogen bonds within the polymer matrix, which lead to increased crystallinity, reduced crystallite size, and stabilized γ phase, and hence improved electric displacement and mitigated hysteresis loss of the polymer.…”

High energy storage density and low energy loss achieved by inserting charge traps in all organic dielectric materials

“…It has been widely accepted that space charges would be injected into insulating materials through metal electrodes under a high electric eld aside from the polarization and depolarization of dipoles. 19,20 The transportation and accumulation of injected charges along the electric eld would cause the increase of energy loss and even early insulation failure. 21 Therefore, in the present work, a certain number of pp conjugated N-vinyl carbazole (VK) units as molecular charge traps are inserted into the poly(methyl methacrylate) (PMMA) main chain.…”

Laminated ferroelectric polymer composites exhibit synchronous ultrahigh discharge efficiency and energy density via utilizing multiple-interface barriers

“…Dielectric polymers are advantageous due to their lightweight strength, easy processing, and robust breakdown as well as rapid charge-discharge capability, and these qualities are highly desired in lm capacitors. [1][2][3][4] Unfortunately, compared to electrochemical devices (i.e., >20 J cm À3 ), the energy densities (U e ) of the available lm capacitors are inferior. [5][6][7][8] For instance, the U e acquired from benchmarking biaxially oriented polypropylene (BOPP) lm is merely 4-5 J cm À3 .…”