聚酰亚胺基复合材料在电池电极中的研究进展

Research Progress of Polyimide-based Composite Materials in Battery Electrodes

聚酰亚胺(Polyimide,PI)是一种以二酐和二胺为原料,热亚胺化后合成的聚合物。PI作为电池电极材料,具有理论容量高、机械强度大和易于回收的优点,但是它的绝缘性限制了内部活性位点的利用率,导致电池的倍率性能较差。本文综述了通过构建共轭结构来提高结构稳定性和引入羰基结构增加PI氧化还原中心(C=O)位点,以获得更高电池容量的研究策略,介绍了碳化PI和与石墨烯、碳纳米管的杂化以及使用静电纺丝工艺对PI作为电池电极的电化学性能的改进,对基于PI的其他复合材料的研究进行了总结,并对目前PI的研究方向进行了展望。

Polyimide(PI) is a polymer synthesized by thermal imination of dianhydride and diamine as raw materials. As a battery electrodes material, it boasts high theoretical capacity, high mechanical strength and easy recovery. However, its insulation limits the utilization rate of internal active sites, resulting in poor rate performance of the battery. A research review is conducted concerning the improvement of the structural stability through enlarging conjugate structure and the introduction of more carbonyl structure(C=O) to increase PI redox center site.In order to obtain higher battery capacity, PI, carbide and graphene combination, the hybridization of carbon nanotubes and the electrostatic spinning process are applied to improve electrochemical performance of battery electrode. The research of other materials based on PI is summarized as well. And the current research direction of PI is prospected.