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Laser-driven coating of vertically aligned carbon nanotubes with manganese oxide from metal organic precursors for energy storage

机译：具有来自金属有机前体的垂直对准碳纳米管的激光驱动涂层，用于储能

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摘要

Carbon nanotubes-transition metal oxide systems are intensively studied due to their excellent properties for electrochemical applications. In this work, an innovative procedure is developed for the synthesis of vertically aligned multi-walled carbon nanotubes (VACNTs) coated with transition metal oxide nanostructures. VACNTs are grown by plasma enhanced chemical vapor deposition and coated with a manganese-based metal organic precursor (MOP) film based on manganese acetate solution. Subsequent UV pulsed laser irradiation induces the effective heating-decomposition of the MOP leading to the crystallization of manganese oxide nanostructures on the VACNT surface. The study of the morphology, structure and composition of the synthesized materials shows the formation of randomly oriented MnO2 crystals, with few nanometers in size, and to their alignment in hundreds of nm long filament-like structures, parallel to the CNT's long axis. Electrochemical measurements reveal a significant increase of the specific capacitance of the MnO2-VACNT system (100 F g(-1)) as compared to the initial VACNT one (21 F g(-1)).
机译：由于其优异的电化学应用，碳纳米管过渡金属氧化物系统被强烈研究。在这项工作中，开发了一种创新的程序，用于合成涂有过渡金属氧化物纳米结构的垂直对齐的多壁碳纳米管（疫苗）。 VACNS通过等离子体增强的化学气相沉积和基于锰醋酸锰溶液的锰基金属前体（MOP）膜涂覆。随后的紫外线脉冲激光照射诱导拖把的有效加热分解，导致锰氧化物纳米结构在VACT表面上结晶。合成材料的形态，结构和组合物的研究表明，随机取向的MnO 2晶体，尺寸较少，并且它们在数百个NM长丝结构中对准，平行于CNT的长轴。电化学测量揭示了与初始VACNT（21V（-1））相比的MNO2-VACNT系统的特定电容（100f g（-1））的显着增加。

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