摘要
This study presents a rational synthesis of hierarchical MnO 2/conducting polypyrrole (PPy)@carbon nanofiber (CNF) triaxial nano-cables via in situ interfacial redox reaction. Uniform MnO 2/PPy multifunctional nanocoatings (∼20 nm) are formed on individual electrospun CNFs, constructing a one-dimensional triaxial configuration. The unique architecture enables a maximum value of the MnO 2/PPy pseudocapacitance and a strong synergetic effect of each component. The specific capacitance of the ternary nanocomposite as a freestanding electrode reaches as high as 705 F g -1 at 2 mV s -1. The three-dimensional porous electrode facilitates a large mass loading of active materials up to 2.0 mg cm -2, which leads to a high areal capacitance of 1.4 F cm -2. The improved electrical conductivity and strong structural integrity of the nanocomposite also endow the electrodes with good rate capability and long-term cycling stability. The superior electrochemical performance indicates that this method is an effective strategy for developing multifunctional nanocomposite electrodes for energy storage devices.
源语言 | 英语 |
---|---|
页(从-至) | 16943-16949 |
页数 | 7 |
期刊 | Journal of Materials Chemistry |
卷 | 22 |
期 | 33 |
DOI | |
出版状态 | 已出版 - 7 9月 2012 |
已对外发布 | 是 |