文献类型：期刊文献

英文题名：Scalable co-cured polyimide/poly(p-phenylene benzobisoxazole) all-organic composites enabling improved energy storage density, low leakage current and long-term cycling stability

作者：Zuo, Peiyuan[1]; Li, Jinpeng[1]; Chen, Donglin[1]; Nie, Lingzhi[1]; Gao, Liang[1]; Lin, Jingyu[1]; Zhuang, Qixin[1]

机构：[1] The Key Laboratory of Advanced Polymer Materials of Shanghai, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, China

年份：2023

卷号：11

期号：1

起止页码：271

外文期刊名：Materials Horizons

收录：EI(收录号：20234715089340)

语种：英文

外文关键词：Aromatic compounds - Curing - Dielectric materials - Energy storage - Film preparation - Leakage currents - Thin films

摘要：The all-organic high-temperature polymer dielectrics with promising scale-up potential have witnessed much progress in the energy storage area, etc. However, the electron suppression trap mechanisms behind many all-organic dielectrics are still unclear, especially for high temperature resistant poly(p-phenylene benzobisoxazole) (PBO) polymers. To resolve this tough issue, we herein innovatively prepared PBO-based all-organic thin films containing sulfone-based polyimide (P(DSDA-ODA)) functioning as an electron trap phase using a facile and scalable co-curing method. The great linear dielectric properties of the prepared P(DSDA-ODA)/PBO films hold high dielectric thermal stability over the temperature range from 25 °C to 200 °C. The 60 wt% P(DSDA-ODA) systems yield the lowest leakage current (3.8 × 10?8 A cm?2). The tight structure and reduced leakage current enable an enhanced breakdown strength of 60 wt% P(DSDA-ODA)/PBO (470 kV mm?1), which is 1.7 times that of pure PBO. Meanwhile, it can reach 4.16 J cm?3 of energy density, which is 257% higher than that for pure PBO thin films while concurrently maintaining a long stable charge-discharge cycle (at least 5000 times) and high charge-discharge efficiency at 85.10%. Moreover, P(DSDA-ODA)/PBO still exhibits excellent energy storage performance at high temperature compared to PBO. This innovative strategy is further verified by replacing P(DSDA-ODA) with P(6FDA-ODA), and therefore lays a solid foundation for more investigation on scalable all-organic dielectrics. ? 2024 The Royal Society of Chemistry.