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An electrodeposited graphite oxide/cobalt hydroxide/chitosan ternary composite on nickel foam as a cathode material for hybrid supercapacitors

机译:镍泡沫上电沉积的氧化石墨/氢氧化钴/壳聚糖三元复合材料作为混合超级电容器的阴极材料

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摘要

In this paper, we report the development of a graphite oxide (GO)/cobalt hydroxide (Co(OH)(2))/chitosan composite to be used as a cathode material for hybrid supercapacitors. The novel GO/Co(OH)(2) binary composite was simply synthesized on nickel foam through a new chitosan-involved electrodeposition process. Physical characterization results indicate that the Co(OH)(2) nanoflakes were uniformly dispersed on the GO sheets with porous structures. The good morphological cooperation between the GO sheets and Co(OH)(2) nanoflakes not only facilitates the charge transport between the active materials and substrate but also benefits the fast diffusion of electrolyte ions into the nanostructured materials. Electrochemical characterization results show that the as-prepared GO/Co(OH)(2)/chitosan composite has great energy storage performance with a high specific capacitance of 402 F g(-1) at 10 mV s(-1) at the mass loading of 2.6 mg cm(-2). These results demonstrate the significant potential of the as-prepared GO/Co(OH)(2)/chitosan composite for low cost, mass production supercapacitors.
机译:在本文中,我们报告了用作混合超级电容器阴极材料的氧化石墨(GO)/氢氧化钴(Co(OH)(2))/壳聚糖复合材料的开发。通过涉及壳聚糖的新电沉积工艺,可以在泡沫镍上简单地合成新颖的GO / Co(OH)(2)二元复合材料。物理表征结果表明,Co(OH)(2)纳米片均匀地分散在具有多孔结构的GO片上。 GO薄板与Co(OH)(2)纳米薄片之间的良好形态合作,不仅促进了活性材料与基材之间的电荷传输,而且还有利于电解质离子快速扩散到纳米结构材料中。电化学表征结果表明,所制备的GO / Co(OH)(2)/壳聚糖复合材料具有良好的储能性能,在质量为10 mV s(-1)时具有402 F g(-1)的高比电容。负载为2.6 mg cm(-2)。这些结果证明了所制备的GO / Co(OH)(2)/壳聚糖复合材料对于低成本,大规模生产的超级电容器具有巨大的潜力。

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