Dipole Orientation Engineering in Crosslinking Polymer Blends for High‐Temperature Energy Storage Applications

• DOI: 10.1002/advs.202405730
• Publication Date: 2024-08-29T12:14:53Z
• Authors: Zizhao Pan; Li Li; Fei Jin; Jiufeng Dong; Yujuan Niu; Liang Sun; Li Tan; Yuqi Liu; Qing Wang; Hong Wang
• Keywords: crosslinking networks; 0301 basic medicine; high energy density; Science; Q; dipole orientation engineering; 0210 nano-technology; high‐temperature polymer dielectrics; high polarization; Research Article

Abstract Polymer dielectrics that perform efficiently under harsh electrification conditions are critical elements of advanced electronic and power systems. However, developing polymer capable reliably withstanding temperatures electric fields remains a fundamental challenge, requiring delicate balance in dielectric constant ( K ), breakdown strength E b thermal parameters. Here, amide crosslinking networks into cyano polymers is introduced, forming asymmetric dipole pairs with differing moments. This strategy weakens the original electrostatic interactions between dipoles, thereby reducing orientation barriers groups, achieving activation while suppressing polarization losses. The resulting styrene‐acrylonitrile/crosslinking styrene‐maleic anhydride (SAN/CSMA) blends exhibit 4.35 an 670 MV m −1 simultaneously at 120 °C, ultrahigh discharged energy densities U e ) 90% efficiency 8.6 7.4 J cm −3 150 °C achieved, respectively, more than ten times same conditions. SAN/CSMA show excellent cyclic stability Combining results ABS (acrylonitrile‐butadiene‐styrene copolymer)/CSMA blends, it demonstrated this novel can meet demands high‐performing elevated temperatures.