材料科学
阳极
介孔材料
锂(药物)
电极
复合数
纳米技术
电解质
纳米孔
聚合物
化学工程
MXenes公司
复合材料
有机化学
催化作用
物理化学
化学
内分泌学
工程类
医学
作者
Tao Li,Bing Ding,Jie Wang,Zongyi Qin,Joseph F. S. Fernando,Yoshio Bandô,Nanjundan Ashok Kumar,Yusuf Valentino Kaneti,Dmitri Golberg,Yusuke Yamauchi
标识
DOI:10.1021/acsami.9b18883
摘要
Organic polymers have attracted significant interest as electrodes for energy storage devices because of their advantages, including molecular flexibility, cost-effectiveness, and environmentally friendly nature. Nevertheless, the real implementation of polymer-based electrodes is restricted by their poor stability, low capacity, and slow electron-transfer/ion diffusion kinetics. In this work, a sandwich-structured composite of ordered mesoporous polydopamine (OMPDA)/Ti3C2Tx has been fabricated by in situ polymerization of dopamine on the surface of Ti3C2Tx via employing the PS-b-PEO block polymer as a soft template. The OMPDA layers with vertically oriented, accessible nanopores (∼20 nm) provide a continuous pore channel for ion diffusion, while the Ti3C2Tx layers guarantee a fast electron-transfer path. The OMPDA/Ti3C2Tx composite anode exhibits high reversible capacity, good rate performance, and excellent cyclability for lithium-ion batteries. The in situ transmission electron microscopy analysis reveals that the OMPDA in the composite only shows a small volume expansion and almost preserves the initial morphology during lithiation. Moreover, these in situ experiments also demonstrate the generation of a stable and ultrathin solid electrolyte interphase layer surrounding the active material, which acts as an electrode protective film during cycling. This study demonstrates the method to develop polymer-based electrodes for high-performance rechargeable batteries.
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