Yeşilot Serkan, Kılıç Nazmiye, Sariyer Selin, Solmaz Yasemin, Güner Merve, Demir-Cakan Rezan
Department of Chemistry, Gebze Technical University, Kocaeli, 41400, Gebze, Turkey.
Department of Chemical Engineering, Gebze Technical University, Kocaeli, 41400, Gebze, Turkey.
Chemphyschem. 2025 Sep 10;26(17):e202500422. doi: 10.1002/cphc.202500422. Epub 2025 Jul 23.
Quinone cathodes have wide application prospects in aqueous zinc-ion batteries (AZIBs) due to their high performance, structural diversity, sustainability, high specific capacity, and fast reaction kinetics. Herein, pillar[6]quinone (P6Q), a member of the quinone group, is used as a cathode in AZIBs for the first time. The P6Q structure consisting of six benzoquinone units with a higher cavity than the quinone structures with small molecule structures is found to greatly improve the cycling stability of the cathode. The P6Q electrode exhibits remarkable electrochemical stability and a long-term cycle life (discharge capacity of 118 mAh g and capacity retention of 83% after 10 000 cycles at current density of 50C). In addition, density functional theory calculations and ex situ characterization methods such as ultraviolet-visible spectroscopy, X-ray photoelectron spectroscopy, and Fourier-transform infrared spectroscopy are used to clarify the possible coordination mechanism between P6Q and Zn/H ions.
醌类阴极由于其高性能、结构多样性、可持续性、高比容量和快速反应动力学，在水系锌离子电池（AZIBs）中具有广阔的应用前景。在此，醌类家族成员柱[6]醌（P6Q）首次被用作AZIBs的阴极。研究发现，由六个苯醌单元组成的P6Q结构，其空腔比具有小分子结构的醌类结构更高，这大大提高了阴极的循环稳定性。P6Q电极表现出卓越的电化学稳定性和长期循环寿命（在50C电流密度下10000次循环后，放电容量为118 mAh g，容量保持率为83%）。此外，采用密度泛函理论计算以及紫外可见光谱、X射线光电子能谱和傅里叶变换红外光谱等非原位表征方法，以阐明P6Q与Zn/H离子之间可能的配位机制。
