Sn‐Polyester/Polyimide Hybrid Flexible Free‐Standing Film as a Tunable Dielectric Material

Abstract

Flexible films having high dielectric constants with low dielectric loss have promising application in the emerging area of high‐energy‐density materials. Here, for the first time, an organometallic, Sn‐polyester‐containing hybrid free‐standing film in polyimide matrix is reported. Polyimide, pBTDA‐HDA, is used with poly(dimethyltin glutarate) and poly(dimethyltin‐3,3‐dimethyglutarate) (pDMTDMG) for having a processable film with tunable dielectric properties. Hybrid film with 60% pDMTDMG and 40% PI (HB2) is found to have improved dielectric features over previously synthesized organic polyimide and organometallic Sn‐polyester homopolymers. These novel organometallic–organic hybrid systems expanded a new area of dielectrics for next‐generation electronics with superior overall electrical performance.

Enhanced High‐Temperature Dielectric Properties of Poly(aryl ether sulfone)/BaTiO3 Nanocomposites via Constructing Chemical Crosslinked Networks

“…By side-by-side comparing the dielectric properties of DPAES, BT/DPAES, and BT/c-DPAES, Dielectric materials that store electrical energy with static charge are ubiquitous in advanced electronic and electrical systems. [1][2][3] Compared with inorganic ceramic dielectrics, polymer dielectrics have higher breakdown strength and higher reliability, simultaneously possess the characteristics of scalable, lightweight, and easy-processing, which are the ideal of many power electronics, [4,5] power conditioning, [6] and artificial muscles for soft robotics. [7] However, polymer dielectrics are limited to relatively low operating temperatures and therefore cannot be used in extreme conditions, such as hybrid and electric vehicles, avionics and underground oil, and gas exploration.…”

High dielectric constant and high breakdown strength polyimide via tin complexation of the polyamide acid precursor

“…5,15,21,22 Aer thorough structural and electrical experimentation and design, it has been found that the newly developed organometallic tin polyester systems exhibit high dielectric constants (6.1-6.8) and have excellent agreement with their computational predictions. 15,21,22 However, similar to BOPP, the thermal stability of Sn-polyesters still needs to be further improved as the ultra-fast charging-discharging process can produce a large amount of heat and increase the temperature of the energy storage device. 21,23 PI's are historically well-known for their high temperature resistance, chemical stability, and excellent mechanical and electrical performances.…”

“…15,21,22 However, similar to BOPP, the thermal stability of Sn-polyesters still needs to be further improved as the ultra-fast charging-discharging process can produce a large amount of heat and increase the temperature of the energy storage device. 21,23…”

“…Metals were also incorporated into polymers in different ways to improve the dielectric constant for stronger polarizability, in the form of Sn, Cd, or Zn containing polyesters. 15,21,22 An effective way to uniformly disperse metals and eliminate the incompatibility of metalpolymer interfaces was to chemically bond the metal into the network of polymer chains. Polymers containing metal atoms in the backbone have been newly developed as dielectric materials.…”

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

“…BOPP displays high band gap (≈7 eV), high E b (>700 MV m −1 ), and extremely low tan δ (<0.02%). [ 46–48 ] The low tan δ ensures its excellent long‐term reliability, vital for power‐grid applications. [ 49 ]…”