Robust ring insoluble naphthoquinone derivative cathode with high loading and long cycle life for aqueous zinc organic batteries  

作　　者：Jiali Wang Xinyu Gao Yongwen Wang Ruonan Pan Zhen Liu Xin Liu Haijiao Xie Feng Yu Gang Wang Tiantian Gu 

机构地区：[1]School of Chemistry and Chemical Engineering/State Key Laboratory Incubation Base for Green Processing of Chemical Engineering,Shihezi University,Shihezi 832003,China [2]Hangzhou Yanqu Information Technology Co.,Ltd.Y2,2nd Floor,Building 2,Xixi Legu Creative Pioneering Park,No.712 Wen’er West Road,Xihu District,Hangzhou 310003,China

出　　处：《Nano Research Energy》2024年第4期23-33,共11页纳米能源研究(英文)

基　　金：National Natural Science Foundation of China(Nos.22109106 and 21865025);Foundation for High-Level Talents in Shihezi University(RCZK202002);Young Innovative Talent Program in Shihezi University(CXBJ202305);。

摘　　要：Organic materials for aqueous zinc ion batteries have been attracted the attention of researchers because of their high safety,environmental friendliness,and structural designability.However,the limited specific capacity,unsatisfactory cycling durability,and unclear charge storage mechanism limit their development and applications.Herein,NTCDA-2,3-DNQ,an organic compound with a benzimidazole ring structure,was designed through the number and distribution of active sites as well as the adjustment of molecular weight,and applied as the cathode for aqueous zinc-ion batteries.NTNQ exhibits high specific capacity of 290.5 mAh·g^(-1) at 0.05 A·g^(-1),excellent rate performance of 133.3 mAh·g^(-1) at 15 A·g^(-1),and relatively stable cycle life with 81.7%capacity retention over 10,000 superlong cycles at 10 A·g^(-1).Furthermore,the synergistic effect of neighboring active sites and multi-electron Zn^(2+)storage reactions are further explored by density functional theory(DFT)calculations,and the results show that NTNQ could stores 4Zn^(2+)while transferring 8e–in the N-Zn-O pathway during the storage of Zn^(2+).Interestingly,NTNQ still exhibits high specific capacity and favorable cycling stability at multiple ultra-high loadings.This work provides important chances including the design concepts of the organic molecules and the investigation of the Zn^(2+)storage mechanism for high performance aqueous zinc ion batteries.

关 键 词：aqueous zinc ion batteries organic molecules high loading electrochemical mechanism synergistic effect 

分 类 号：TM9[电气工程—电力电子与电力传动]