Liu Zixuan, Li Yan, Mei Binhua, Liu Jiaxue, Niu Haijun, Hou Yanjun
Key Laboratory of Chemistry, Chemical Engineering and Materials, High-Quality Technology Conversion, Heilongjiang Province & School of Chemistry and Chemical Engineering, Heilongjiang University, Harbin 150086, China.
Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education & Department of Macromolecular Science and Engineering, School of Chemistry and Chemical Engineering, Heilongjiang University, Harbin 150086, China.
Int J Mol Sci. 2025 Apr 18;26(8):3838. doi: 10.3390/ijms26083838.
Aqueous zinc-ion batteries (AZIBs) have attracted interest for their low cost and environmental friendliness. Two bipolar organic materials with different degrees of conjugation, pPMQT and pNTQT, were rationally designed and synthesized as cathode candidates for AZIBs based on 4,4'-diaminotriphenylamine (TPA), 2,7-diaminoanthraquinone (AQ), and two anhydrides. This molecular design features an increased conjugation and electron cloud density, thereby improving charge transport kinetics, specific capacity, and cycling stability. In comparison with pPMQ and pNTQ (n-type), pPMQT and pNTQT demonstrate better electrochemical characteristics. In this work, pNTQT shows outstanding performance. It exhibits an initial capacity of 349.79 mAh g at 0.1 A g and retains a specific capacity of 190.25 mAh g (87.6%) after 5000 cycles at 5 A g. In comparison, pNTQ demonstrates a specific capacity of only 207.55 mAh g at 0.1 A g, and after 5000 cycles at 5 A g, its capacity retention rate is only 81.2%. At the same time, both pPMQT and pNTQT polymer films demonstrate attractive electrochromic (EC) properties, displaying reversible color transitions from yellow to dark blue in the UV-visible spectrum. This work lays the foundation for the further development of triphenylamine-based polyimide materials for application in AZIBs and electrochromism.
水系锌离子电池（AZIBs）因其低成本和环境友好性而备受关注。基于4,4'-二氨基三苯胺（TPA）、2,7-二氨基蒽醌（AQ）和两种酸酐，合理设计并合成了两种具有不同共轭程度的双极有机材料pPMQT和pNTQT，作为AZIBs的阴极候选材料。这种分子设计的特点是共轭和电子云密度增加，从而改善了电荷传输动力学、比容量和循环稳定性。与pPMQ和pNTQ（n型）相比，pPMQT和pNTQT表现出更好的电化学特性。在这项工作中，pNTQT表现出优异的性能。在0.1 A g时，其初始容量为349.79 mAh g，在5 A g下循环5000次后，比容量保持在190.25 mAh g（87.6%）。相比之下，pNTQ在0.1 A g时的比容量仅为207.55 mAh g，在5 A g下循环5000次后，其容量保持率仅为81.2%。同时，pPMQT和pNTQT聚合物薄膜都表现出引人注目的电致变色（EC）特性，在紫外可见光谱中显示出从黄色到深蓝色的可逆颜色转变。这项工作为基于三苯胺的聚酰亚胺材料在AZIBs和电致变色领域的进一步发展奠定了基础。
