碱金属
阳极
共价键
储能
阴极
共价有机骨架
化学
电池(电)
材料科学
纳米技术
多孔性
有机自由基电池
阴极保护
化学工程
有机化学
电化学
电极
物理
功率(物理)
物理化学
工程类
量子力学
作者
Yunpeng Xu,Pingwei Cai,Kai Chen,Qingsong Chen,Zhenhai Wen,Long Chen
标识
DOI:10.1002/ange.202215584
摘要
Abstract Covalent organic frameworks (COFs), thanks to their adjustable porous structure and abundant build‐in functional motifs, have been recently regarded as promising electrode materials for a variety of batteries. There still remain grand opportunities to further utilizing their merits for developing advanced COFs‐based batteries. In this paper, we propose a hybrid acid/alkali all‐COFs battery by coupling pyrene‐4,5,9,10‐tetraone based COF cathode with anthraquinone based COF anode. In such a hybrid acid/alkali all‐COFs battery, the cathodic COF favorably works in acid with a relatively positive potential, while the anodic COF preferably runs in alkali with a relatively negative potential. It thus can deliver a decently high discharge capacity of 92.97 mAh g −1 with a wide voltage window of 2.0 V, and exhibit high energy density of 74.2 Wh kg −1 along with a considerable cyclic stability over 300 cycles. The development of the proof‐of‐concept all‐COFs battery may drive forward the improvement of newly cost‐effective and performance‐reliable energy storage devices.
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