Xu Fei, Jin Shangbin, Zhong Hui, Wu Dingcai, Yang Xiaoqing, Chen Xiong, Wei Hao, Fu Ruowen, Jiang Donglin
1] Department of Materials Molecular Science, Institute for Molecular Science, National Institutes of Natural Sciences, 5-1 Higashiyama, Myodaiji, Okazaki 444-8787, Japan [2] Materials Science Institute, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, P. R. China.
Department of Materials Molecular Science, Institute for Molecular Science, National Institutes of Natural Sciences, 5-1 Higashiyama, Myodaiji, Okazaki 444-8787, Japan.
Sci Rep. 2015 Feb 4;5:8225. doi: 10.1038/srep08225.
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.
不含有毒金属物种的有机电池可能会催生新一代安全且环境友好的消费级储能设备。然而，传统的有机电极由于其结构不稳定、离子扩散动力学缓慢以及导电性差等问题，仍然存在缺陷。在此，我们报道了一种用于电极的、负载于碳纳米管上的氧化还原活性晶体介孔共价有机框架（COF）的研发；共价网络增强了电极稳定性，开放的介孔通道促进了离子传输，而碳纳米管导线提高了电子导电性。这些效应协同作用于能量存储，为锂离子电池提供了高效率、强大的循环稳定性和高倍率性能。我们的结果表明，导电碳上的氧化还原活性COF可作为储能的独特平台，并可能有助于设计用于高性能和环境友好型电池设备的新型有机电极。
