Taking 5,10-dihydrophenazine and 1,6-dibromopyrene as raw materials,poly(phenazine-pyrene)(p-PyPZ),a novel polymer,is synthesized through the Buchwald-Hartwig arylation reaction,and used as lithium battery cathode materials.Its electrochemistry and battery performance are studied,its structural morphology is characterized by means of FT-IR and XPS,and its performance is tested through electrochemical cyclic voltammetry(CV).The results show that the p-PyPZ polymer has multiple redox characteristics,and the redox characteristic peak corresponding to the pyrene structural unit appears at 3.590/3.447 V,indicating that the pyrene structural unit in the novel copolymer serves as a linking unit and participates in the redox process at the same time,making the prepared electrode material have multi-electron energy storage properties.As a cathode material for lithium-ion battery,p-PyPZ polymer exhibits excellent cycle stability.At a current density of 20 mA·g-1,its stable discharge specific capacity reaches 112.1 mAh·g-1,which can still remain at 113 mAh·g-1 after 50 charge-discharge cycles.Its discharge specific capacities are stable at 114.7 mAh·g-1,109.6 mAh·g-1,103 mAh·g-1,96.6 mAh·g-1 and 92.1 mAh·g-1,respectively at current densities of 20 mA·g-1,50 mA·g-1,100 mA·g-1,200 mA·g-1 and 500 mA·g-1.
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