Xun Lijiao, Li Chen, Meng Qinghai, Wang Zilong, Guo Ying, Zheng Kun, Zhou Heng, Zhao Tong
Key Laboratory of Science and Technology on High-tech Polymer Materials, Institute of Chemistry Chinese Academy of Sciences, Beijing, 100190, China.
University of Chinese Academy of Sciences, Beijing, 100049, China.
Adv Sci (Weinh). 2024 Dec;11(47):e2407156. doi: 10.1002/advs.202407156. Epub 2024 Oct 30.
Structural battery integrated composites (SBICs) combining outstanding strength and heat resistance are highly desirable candidates for next generation high speed aircraft. Here, a novel high-temperature-resistant bi-continuous electrolyte based on phthalonitrile resin is presented, allowing the construction of SBICs capable of stable operation across a wide temperature range. Excellent mechanical strength and high ionic conductivity can coexist in a bi-continuous structure electrolyte (PL) where the phthalonitrile resin serves as the matrix phase and the ionic liquid electrolyte serves as the conductive phase. Benefiting from the thermal stability of the phthalonitrile resin, SBICs assembled with a PL bi-continuous electrolyte deliver excellent mechanical performance even at temperatures exceeding 200 °C, with a flexural strength of 299 MPa and a flexural modulus of 31.8 GPa. Additionally, with an increase in operating temperature, PL@SBICs demonstrated enhanced rate performance while maintaining good cycling stability. The demonstration of resisting mechanical abuse at high temperatures and flame retardance further suggests the promise of SBICs with PL bi-continuous electrolytes operating under extreme conditions.
结合出色强度和耐热性的结构电池集成复合材料（SBICs）是下一代高速飞机的理想候选材料。在此，提出了一种基于邻苯二甲腈树脂的新型耐高温双连续电解质，使得能够构建在宽温度范围内稳定运行的SBICs。优异的机械强度和高离子电导率可以在双连续结构电解质（PL）中共存，其中邻苯二甲腈树脂作为基体相，离子液体电解质作为导电相。受益于邻苯二甲腈树脂的热稳定性，用PL双连续电解质组装的SBICs即使在超过200°C的温度下也能提供出色的机械性能，弯曲强度为299MPa，弯曲模量为31.8GPa。此外，随着工作温度的升高，PL@SBICs在保持良好循环稳定性的同时表现出增强的倍率性能。在高温下抗机械滥用和阻燃性的证明进一步表明了具有PL双连续电解质的SBICs在极端条件下运行的前景。
