Hybrid Acid/alkali All Covalent Organic Frameworks Battery

Author:

Xu Yunpeng1,Cai Pingwei2,Chen Kai2,Chen Qingsong2,Wen Zhenhai2ORCID,Chen Long1

Affiliation:

1. Department of Chemistry Tianjin Key Laboratory of Molecular Optoelectronic Science Tianjin University Tianjin 300072 P. R. China

2. CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Provincial Key Laboratory of Materials and Techniques toward Hydrogen Energy Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian 350002 China

Abstract

AbstractCovalent 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−1with a wide voltage window of 2.0 V, and exhibit high energy density of 74.2 Wh kg−1along 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.

Funder

National Natural Science Foundation of China

Dalian National Laboratory for Clean Energy

Publisher

Wiley

Subject

General Medicine

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