亚胺基聚酰亚胺的制备及锌离子电池性能探究OA

Polyimide polymers(PI)have the advantages of stable structure and reversible electrochemical reactions.This article explores whether polyimide containing imide groups(C=N)will improve the redox of the material in zinc-ion batteries activity,thereby leading to better electrochemical performance.Dehydration polymerization of 2,3-diaminophenazine and 1,4,5,8-naphthalenetetracarboxylic anhydride(NTCDA)was used,and SEM,FTIR and XPS characterization proved that polyimide containing imide structure was successfully synthesized.Electrochemical testing of the prepared PI compound using a two-electrode system and a button cell found that the PI had two pairs of obvious redox peaks,while ordinary PI only had one pair of redox peaks.This may be attributed to the conjugated carbonyl group in PI compounds undergoes a redox reaction with Zn2+to store/release electrons;the imine group(C=N)in PI compounds can also undergo a redox reaction with Zn2+to store/release electrons.This article improves the redox activity of PI materials and the electrochemical performance of zinc-ion batteries by introducing imine groups.