Tian Yaya, Zheng Ming-Sheng, Li Yuchao, Xu Chuqi, Zhang Yiyi, Liu Wei, Dang Zhi-Min, Zha Jun-Wei
Beijing Advanced Innovation Center for Materials Genome Engineering, School of Chemistry and Biological Engineering, University of Science & Technology Beijing, Beijing 100083, P. R. China.
School of Materials Science and Engineering, Liaocheng University, Liaocheng, 252059, P. R. China.
Mater Horiz. 2023 Nov 27;10(12):5835-5846. doi: 10.1039/d3mh01267k.
Polymer dielectric materials with excellent temperature stability are urgently needed for the ever-increasing energy storage requirements under harsh high-temperature conditions. In this work, a novel diamine monomer (bis(2-cyano-4-aminophenyl)amine) was successfully synthesized to prepare a series of cyano-containing polyimides (CPI-1-3), which possessed excellent dielectric properties and high thermostability. The maximum dielectric permittivity was up to 5.5 at 10 Hz for CPI-3, being 2.5 times higher than that of commercially used BOPP. In comparison, the CPI-1 exhibited an outstanding breakdown strength of 433 MV m and a high energy density of 2.5 J cm even at 250 °C, which was the highest value reported under the same conditions. The synthesized CPIs through such an intrinsic approach are potential candidate materials for energy storage and even other applications under simultaneously harsh electrical and thermal conditions.
在苛刻的高温条件下，不断增长的储能需求迫切需要具有优异温度稳定性的聚合物介电材料。在这项工作中，成功合成了一种新型二胺单体（双（2-氰基-4-氨基苯基）胺），以制备一系列含氰基的聚酰亚胺（CPI-1-3），它们具有优异的介电性能和高耐热性。CPI-3在10 Hz时的最大介电常数高达5.5，是商业使用的BOPP的2.5倍。相比之下，CPI-1即使在250°C时也表现出433 MV/m的出色击穿强度和2.5 J/cm³的高能量密度，这是在相同条件下报道的最高值。通过这种内在方法合成的CPIs是在苛刻的电气和热条件下同时用于储能甚至其他应用的潜在候选材料。
