Preparation of polytriphenylamine derivative containing imine electroactive structure and its electrochemical performance as the organic cathode of lithium ion batteries

s P-type polymer as an organic-based electrode material has shown a wide application prospect in the energy storage field due to its high redox potential and good structural designability. Therein, a novel arylamine-based polymer (P (DT-TPA)), containing rich imine structure, has been synthesized via a Buchwald-Hartwig coupling reaction using 4,4′-dibromo triphenylamine and p-phenylenediamine as reactive monomers. It exhibited a polyaniline-like molecular backbone and contained abundant N redox-active centers, which provided P(DT-TPA) with the improved specific capacity and the remarkably rate performances, as the organic cathode of lithium ion batteries. Under the current density of 100 mA·g -1 , it exhibited a discharge specific capacity of 145 mAh·g -1 in the first cycle and 133.3 mAh·g -1 after 100 cycles, with a 91.93 % of capacity retention, demonstrating excellent cycling stability. Also, its discharge specific capacities were 155.8, 149, 144, 139.3 and 133.4 mAh·g -1 at current densities of 50, 100, 200, 500 and 1000 mA·g -1 , respectively. Furthermore, the research on energy storage process proved that electrode material was mainly controlled by a mixture of diffusion and capacitive kinetics process.