Research Progress of All Organic Polymer Dielectrics for Energy Storage from the Classification of Organic Structures

Abstract

Dielectric films are the foundation of power electronic equipment for energy storage in capacitors. However, typical dielectric films exhibit undesirable energy storage density and thermal stability, limiting its further application in the advanced field. For both pure polymers and composites‐based dielectrics, the macromolecular matrix greatly determines the performances. This paper summarizes the research progress of all‐organic polymer materials for the dielectric application from the perspective of molecular structure design. Systematic comparisons on properties, including dielectric constant and dielectric loss, glass transition temperature, and energy density are given, expecting to inspire researchers to devote further efforts in this area. An outlook for the future of all‐polymer dielectrics is also presented.

Energy Storage Application of All-Organic Polymer Dielectrics: A Review

“…Poly(methyl methacrylate) PMMA, polyetherimide (PEI), polythiourea (PTU), and polysulfone (PSF) are polar polymers; polypropylene (PP) and polystyrene (PS) are nonpolar polymers. Various polymers, including polycarbonate (PC), poly(phenylene sulfide) (PPS), poly(ethylene 2,6-naphthalate) (PEN), and poly(ethylene terephthalate) (PET), have been successfully developed and applied in commercial capacitor dielectrics [ 41 , 42 , 43 , 44 , 45 , 46 ].…”

Polymer-based dielectrics with high permittivity and low dielectric loss for flexible electronics

“…Low dielectric loss means less heat generated compared with high dielectric loss when the device is working. 14…”

“…Low dielectric loss means less heat generated compared with high dielectric loss when the device is working. 14 During past decades, many studies have aimed to enhance the dielectric property of polymer-based materials. In general, an increased dielectric constant can be created by (1) introducing polar groups into the polymer chain, such as a cyano group (-CN) 19 or a sulfonyl group (-SO 2 -), 20 to enhance dipolar polarization in the presence of an electric field; (2) putting nano-fillers into the polymer matrix to form polymer nanocomposites.…”

Influence of imidazole derivatives on the dielectric and energy storage performance of epoxy

“…Epoxy-based dielectric films have significant energy storage advantages over BOPP films, especially under the operational E-field (200 MV/m) in electrical automobile [17,18]. Therefore, EP cured by imidazole has high possibility to be used as matrix for energy storage through organic-inorganic hybridisation [19,20] and multi-layer construction [21,22] to enhance their upper boundary of energy storage performances [23], or independently developed as a dielectric film with good processability [24][25][26]. It should be emphasised that the requirements for dielectric film applied in different situations are diverse [27].…”

“…The different trend in E b on various contents of imidazole is probably due to their distinct chemical structures.2E4MZ is able to incorporate into the main-chain of the network through both addition reaction and anionic polymerisation while 1EZ mostly attaches at the chain-end of the network. When excessive imidazole amount is introduced, 2E4MZ still has the capability to bond with EP through addition reaction while 1EZ would form as a molecule or small segments, which deteriorates the polymer network, thus further leading to E b reduction[9,23]. Volume resistivity was also characterised to facilitate illustration.…”