纳米棒
材料科学
碳纤维
纳米技术
电化学
离子
化学工程
电极
化学
有机化学
物理化学
复合数
工程类
复合材料
作者
Shaodong Zhang,Ziyang Song,Miao Liu,Yaokang Lv,Liangchun Li,Lihua Gan,Mingxian Liu
标识
DOI:10.1016/j.cej.2023.143497
摘要
The sluggish ion-migration kinetics and structural instability are critical limits of isolated single-level carbon structures, inhibiting capacitive activity and durability of Zn-ion capacitors. To conquer the roadblocks, making well-defined arrangement of low-dimensional building blocks into integrative carbon superstructures gives a promising solution, but remains challenging. Herein, we report a crystal splitting growth and self-assembly strategy to customize nanorod-integrated carbon superstructures for activating superior Zn-ion storage. The coordination between 3-aminobenzoic acid as an organic linker and Cu2+ as a metal node triggers the crystal splitting growth of polymeric clusters to yield nanorod modules, which further couple with 4,4′-bipyridine to self-assemble into exquisite superstructures. Featured with well-arranged one-piece topographies and beneficial diheteroatomic attributes, the robust carbon superstructures empower fast ion transport and easy accessibility of zincophilic sites with low energy barriers. The fabricated Zn-ion capacitors thus deliver ultrahigh energy density (157 Wh kg−1) and extraordinary cyclability (300,000 [email protected] A g−1). Systematic studies identify the root of excellent electrochemical metrics as high-kinetics alternately physical uptake of Zn2+/SO42− charge carriers and multielectron chemical redox reaction of pyridine/carbonyl motifs with Zn2+ to form N−Zn−O bonds. This work provides new avenues to engineer carbon superstructures for propelling advanced energy storage.
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