State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, WUT-Harvard Joint Nano Key Laboratory, Wuhan University of Technology, Wuhan 430070, China.
Nano Lett. 2011 Nov 9;11(11):4992-6. doi: 10.1021/nl202943b. Epub 2011 Oct 11.
We designed and successfully synthesized the silver vanadium oxides/polyaniline (SVO/PANI) triaxial nanowires by combining in situ chemical oxidative polymerization and interfacial redox reaction based on β-AgVO(3) nanowires. The β-AgVO(3) core and two distinct layers can be clearly observed in single triaxial nanowire. Fourier transformed infrared spectroscopic and energy dispersive X-ray spectroscopic investigations indicate that the outermost layer is PANI and the middle layer is Ag(x)VO((2.5+0.5x)) (x < 1), which may result from the redox reaction of Ag(+) and aniline monomers at the interface. The presence of the Ag particle in a transmission electron microscopy image confirms the occurrence of the redox reaction. The triaxial nanowires exhibit enhanced electrochemical performance. This method is shown to be an effective and facile technique for improving the electrochemical performance and stability of nanowire electrodes for applications in Li ion batteries.
我们通过结合原位化学氧化聚合和基于β-AgVO(3)纳米线的界面氧化还原反应，成功设计并合成了银钒氧化物/聚苯胺（SVO/PANI）三轴纳米线。在单根三轴纳米线中可以清楚地观察到β-AgVO(3)核和两个不同的层。傅里叶变换红外光谱和能量色散 X 射线能谱研究表明，最外层是 PANI，中间层是 Ag(x)VO((2.5+0.5x))（x < 1），这可能是由于 Ag(+)和苯胺单体在界面处的氧化还原反应所致。透射电子显微镜图像中 Ag 颗粒的存在证实了氧化还原反应的发生。三轴纳米线表现出增强的电化学性能。该方法被证明是一种有效且简便的技术，可提高锂离子电池中纳米线电极的电化学性能和稳定性。
