A donor-acceptor conjugated bipolar polymer with multielectron redox sites for long-cycle-life and high-rate aqueous zinc dual-ion batteries  

作　　者：Lian-Wei Luo Siteng Zhu Wen Yan Ma Dan Li Chong Zhang Jia-Xing Jiang 

机构地区：[1]Key Laboratory of Optoelectronic Chemical Materials and Devices(Ministry of Education),School of Optoelectronic Materials&Technology,Jianghan University,Wuhan 430056,Hubei,China [2]Key Laboratory for Macromolecular Science of Shaanxi Province,Shanxi Engineering Laboratory for Advanced Energy Technology,School of Materials Science and Engineering,Shaanxi Normal University,Xi'an 710062,Shaanxi,China

出　　处：《Journal of Energy Chemistry》2025年第3期144-150,共7页能源化学(英文版)

基　　金：financial supported by the National Natural Science Foundation of China(22175110&22375076,52103264);the Hubei Provincial Natural Science Foundation of China(2024AFA031);the Key Research and Development Program of Wuhan(2024010802030157)。

摘　　要：Aqueous zinc-ion batteries(AZIBs)have hugely latent advantages in large-scale energy storage due to its innate safety,reasonable price,and sustainability.However,most AZIB cathode materials suffer from short cycling life and poor rate performance.Herein,a bipolar donor-acceptor(D-A)conjugated microporous polymer(PTZ-BDTB),consisting of electron-withdrawing benzo[1,2-b:4,5-b']dithiophene-4,8-dio ne(BDTB)units and electron-donating phenothiazine(PTZ)units,is developed as the cathode material of aqueous zinc dual-ion batteries(AZDIBs).The D-A type structure design could reduce the band gap,thus promoting electron transfer in the polymer framework.Therefore,the PTZ-BDTB cathode in a30 mol/kg(m)ZnCl_(2)water-in-salt electrolyte exhibits a high reversible capacity of 202 mA h g^(-1)at0.05 A g^(-1)with excellent rate performance(109 mA h g^(-1)at 15 A g^(-1)),which is far superior to its counterpart polymers PPTZ and PB-BDTB.Impressively,PTZ-BDTB shows ultra-stable cycle performance with capacity retention ratios of 76.2%after 460 cycles at 0.05 A g^(-1)and 96%after 27000 cycles at 5 A g^(-1).PTZBDTB also exhibits a low self-discharge ability with capacity retention about 76.4%after resting the battery for 28 days.These results demonstrate that D-A type structural design is a promising strategy for constructing high performance cathode materials for AZDIBs.

关 键 词：Conjugated microporous polymer Donor-acceptor structure Bipolar organic cathode material Aqueous zinc dual-ion batteries 

分 类 号：TM912[电气工程—电力电子与电力传动]