10,000× resistivity at 250°C
By threading cyclic polyethers onto polyimide backbones to form mechanical bonds, phonon-assisted charge transport is suppressed, enabling superior high-temperature capacitive energy storage beyond the 200°C limit of conventional polymers.
Wang, Rui · Zhu, Yujie · Huang, Shangshi · Fu, Jing · Zhou, Yifan · Li, Manxi · Li, Meng · Liang, Jiajie · Yang, Mingcong · Li, Junluo · Hu, Jun · He, Jinliang · Li, Qi
Nature Materials 2025
d.c. resistivity four orders of magnitude higher than commercial polyimides at 250°C
discharged energy density of 4.1 J cm⁻³ with 90% charge–discharge efficiency at 250°C