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首页> 外文期刊>International Journal of Electrochemical Science >Constructing Ultrafine Tin Dioxide/Few-Walled Carbon Nanotube Composites for High-performance Supercapacitors
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Constructing Ultrafine Tin Dioxide/Few-Walled Carbon Nanotube Composites for High-performance Supercapacitors

机译：构建用于高性能超级电容器的超细二氧化锡/无壁碳纳米管复合材料

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摘要

A hydrothermal/calcination method was successfully applied to prepare ultrafine tin dioxide(SnO 2 )/few-walled carbon nanotube (FWNT) composites (SnO 2 @FWNT). The correspondingmorphological and structural information were further obtained by the characterization technique oftransmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. In theSnO 2 @FWNT composites, ultrafine SnO 2 nanoparticles with an average size of 2–3 nm wereuniformly distributed on the FWNT with a thickness of 2–5 layers. With the synergistic effect ofhighly conductive FWNT and highly dispersed SnO 2 , the SnO 2 @FWNT hybrids presented excellentspecific capacitance of 220.5 F g -1 at a scan rate of 2 mV s -1 under neutral environment. A powerdensity of 30.63 kW kg -1 and an energy density of 512.79 W kg -1 were obtained, respectively. Inaddition, a specific capacity retention rate of 89.57% was acquired after 1000 cycles, indicating asuperior stability of SnO 2 @FWNT hybrids. The results indicate that the SnO 2 @FWNT composites canbe used as an alternative electrode material for high-performance supercapacitors.
机译：成功地采用水热煅烧法制备了超细二氧化锡（SnO 2）/少壁碳纳米管（FWNT）复合材料（SnO 2 @FWNT）。通过透射电子显微镜，X射线衍射和X射线光电子能谱表征技术进一步获得相应的形貌和结构信息。在SnO 2 @FWNT复合材料中，平均粒径为2-3 nm的超细SnO 2纳米颗粒均匀分布在FWNT上，厚度为2-5层。由于具有高导电性的FWNT和高度分散的SnO 2的协同作用，SnO 2 @FWNT杂化物在中性环境下以2 mV s -1的扫描速率显示出220.5 F g -1的优异比电容。获得的功率密度分别为30.63 kW kg -1和512.79 W kg -1。另外，在1000次循环后获得的比容量保持率为89.57％，表明SnO 2 @FWNT杂种的优异稳定性。结果表明，SnO 2 @FWNT复合材料可以用作高性能超级电容器的替代电极材料。

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