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]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Adv Polymer Mat Shanghai, Shanghai 200237, Peoples R China

年份：2024

卷号：11

期号：1

起止页码：271

外文期刊名：MATERIALS HORIZONS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001101421400001)】；

基金：All authors are grateful for financial support from the National Natural Science Foundation of China (52073091, 52303083, 52373073, 2171086), Shanghai Pujiang Program (22PJ1402500), Shanghai Rising-Star Program (21QA1403900) and the Key Laboratory of Advanced Polymer Materials of Shanghai.

语种：英文

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 degrees C to 200 degrees C. The 60 wt% P(DSDA-ODA) systems yield the lowest leakage current (3.8 x 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(6FDAODA), and therefore lays a solid foundation for more investigation on scalable all-organic dielectrics.