Pei Shaotong, Lan Bo, Bai Xueting, Liu Yunpeng, Li Xinyang, Wang Chao
Hebei Provincial Key Laboratory of Power Transmission Equipment Security Defense, North China Electric Power University, Baoding 071003, China.
Department of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China.
Polymers (Basel). 2024 Nov 24;16(23):3266. doi: 10.3390/polym16233266.
Designing novel π-conjugated conductive polymers with abundant redox-active groups is a viable route to achieve high charge storage performance for aqueous energy storage devices. Electropolymerization is a powerful tool to construct conductive polymers. Here, s-triazine is, for the first time, electropolymerized in an aqueous acidic solution on carbon cloth. The polytriazine-coated carbon cloth electrode (PT/CC) exhibits a granular structure, with abundant pores. The charge storage performance is investigated, and a specific capacity of 101.4 mAh g-1 at 1 A g-1 in 1 M H2SO4 is achieved. Additionally, in 1 M ZnSO, a specific capacity of 50.3 mAh g-1 at 1 A g-1 can be achieved by the PT/CC. The PT/CC behaves as a battery-type charge storage electrode, and the amino/imino and carbonyl/hydroxyl groups contribute to the charge storage, with cation insertion and extraction. A symmetric aqueous charge storage device assembled with two PT/CC electrodes exhibits an energy density of 12.92 Wh kg-1 and a power density of 250 W kg-1 at 1 A g-1. After 2500 cycles at 10 A g-1, the device retains a specific capacity of 83.3%. This study indicates that the PT is a potential candidate material for an aqueous energy storage device.
设计具有丰富氧化还原活性基团的新型π共轭导电聚合物是实现水系储能装置高电荷存储性能的可行途径。电聚合是构建导电聚合物的有力工具。在此，首次在碳布上的酸性水溶液中对均三嗪进行电聚合。聚三嗪包覆的碳布电极（PT/CC）呈现出颗粒状结构，具有丰富的孔隙。研究了其电荷存储性能，在1 M H2SO4中，1 A g-1时的比容量达到101.4 mAh g-1。此外，在1 M ZnSO4中，PT/CC在1 A g-1时的比容量可达50.3 mAh g-1。PT/CC表现为电池型电荷存储电极，氨基/亚氨基和羰基/羟基通过阳离子的插入和脱出对电荷存储有贡献。由两个PT/CC电极组装而成的对称水系电荷存储装置在1 A g-1时的能量密度为12.92 Wh kg-1，功率密度为250 W kg-1。在10 A g-1下循环2500次后，该装置的比容量保持率为83.3%。这项研究表明，PT是水系储能装置的潜在候选材料。
