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

Abstract

With the wide application of energy storage equipment in modern electronic and electrical systems, developing polymer-based dielectric capacitors with high-power density and rapid charge and discharge capabilities has become important. However, there are significant challenges in synergistic optimization of conventional polymer-based composites, specifically in terms of their breakdown and dielectric properties. As the basis of dielectrics, all-organic polymers have become a research hotspot in recent years, showing broad development prospects in the fields of dielectric and energy storage. This paper reviews the research progress of all-organic polymer dielectrics from the perspective of material preparation methods, with emphasis on strategies that enhance both dielectric and energy storage performance. By dividing all-organic polymer dielectrics into linear polymer dielectrics and nonlinear polymer dielectrics, the paper describes the effects of three structures (blending, filling, and multilayer) on the dielectric and energy storage properties of all-organic polymer dielectrics. Based on the above research progress, the energy storage applications of all-organic dielectrics are summarized and their prospects discussed.

Rheological, mechanical, and electrical properties of Sr0.7Bi0.2TiO3 modified BaTiO3 ceramic and its composites

“…Figure 9C shows the local electric field distribution, the local electric field concentration part is mainly at the junction of ceramic and epoxy resin, up to 10 4 kV/cm. This may be due to the strong interfacial polarization between inorganic ceramics and epoxy organics, which increases the dielectric constant of the complex but at the same time affects the BDS of the composite 67 …”

“…Correspondingly, the dielectric loss reaches its maximum at a frequency of ∼10 4 , exhibiting a significant hysteresis loss. This behavior can be attributed to the interaction of many large ferroelectric domains and highly coupled dipoles in ferroelectric polymers 67,71 …”

“…This may be due to the strong interfacial polarization between inorganic ceramics and epoxy organics, which increases the dielectric constant of the complex but at the same time affects the BDS of the composite. 67 For polymer composite dielectric materials, the dielectric constant is the main parameter that determines their dielectric properties. 68,69 Figure 10A shows the dielectric constant of ceramic-epoxy composite as a function of frequency, and the inset shows the dielectric loss versus frequency.…”

Scalable Ultrathin All‐Organic Polymer Dielectric Films for High‐Temperature Capacitive Energy Storage

“…Ever‐increasing miniaturization of the capacitors to reduce their volume, weight, and cost urgently requires high‐quality scalable ultrathin flexible high‐temperature dielectric films [ 13–15 ] with concurrent high discharge energy density. [ 9,10,12,15–21 ] However, preparing high‐quality scalable ultrathin dielectric films remains challenging for high‐temperature dielectric energy storage films. For example, the thickness of high‐temperature dielectric films is often limited to 10 µm, [ 3,22–31 ] while the thickness of the state‐of‐the‐art benchmark biaxially oriented polypropylene (BOPP) dielectric films for commercial capacitors can be less than 2.5 µm [ 6,7,13,32 ] although its operating temperature is lower than 105 °C.…”

Improving the Energy Storage Performance of All‐Polymer Composites By Blending PVDF and P(VDF−CTFE)

“…[20] To improve the dielectric constant of polymers, a lot of work has been carried out around polymer-based inorganic filler composites. [21] The main approaches are to fill polymers with high-dielectric ceramic nanoparticles, such as BaTiO 3 [22] and Na 0.5 Bi 0.5 TiO 3 , [23] or conductive materials, [24,25] such as carbon nanotubes and graphene. With the content of inorganic fillers increasing, the composites can all show an increase in dielectric constant.…”