Electrochemically active, crystalline, mesoporous covalent organic frameworks on carbon nanotubes for synergistic lithium-ion battery energy storage

作者：Fei Xu, Shangbin Jin, Hui Zhong, Dingcai Wu, Xiaoqing Yang, Xiong Chen, Hao Wei, Ruowen Fu, Donglin Jiang · 发表于：Scientific Reports · 年份：2015 · DOI：10.1038/srep08225 · 被引用次数：387 · 研究领域：Covalent Organic Framework Applications、Advanced Battery Materials and Technologies、Advanced battery technologies research

Organic batteries free of toxic metal species could lead to a new generation of consumer energy storage devices that are safe and environmentally benign. However, the conventional organic electrodes remain problematic because of their structural instability, slow ion-diffusion dynamics, and poor electrical conductivity. Here, we report on the development of a redox-active, crystalline, mesoporous covalent organic framework (COF) on carbon nanotubes for use as electrodes; the electrode stability is enhanced by the covalent network, the ion transport is facilitated by the open meso-channels, and the electron conductivity is boosted by the carbon nanotube wires. These effects work synergistically for the storage of energy and provide lithium-ion batteries with high efficiency, robust cycle stability, and high rate capability. Our results suggest that redox-active COFs on conducting carbons could serve as a unique platform for energy storage and may facilitate the design of new organic electrodes for high-performance and environmentally benign battery devices.