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首页> 外文期刊>International Journal of Electrochemical Science >Electrochemical Behaviors of Functionalized Carbon Nanotubes in LiPF6/EC+DMC Electrolyte
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Electrochemical Behaviors of Functionalized Carbon Nanotubes in LiPF6/EC+DMC Electrolyte

机译：LiPF 6 / EC + DMC电解质中功能化碳纳米管的电化学行为

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The effect of oxidation on the surface functional groups of carbon nanotubes (CNT) through acidicagents (nitric acid and a mixture of sulfuric and nitric acid) was studied. The correlation between theamount of surface functional groups and the electrochemical properties of CNT in LiPF6/EC+DMCElectrolyte was then investigated. Transmission electron microscopy (TEM) and Fourier transforminfrared spectrophotometer (FTIR) suggested that oxygen-containing surface groups were successfullyintroduced and the highly tangled long ropes of CNT were cut into short, open-ended pipes during theacid treatment. The amount of functional groups was evaluated by acid-base titration. Charged anddischarged testing and cyclic voltammetry (CV) were used to characterize the electrochemicalbehaviors of the samples. It is found that the electrochemical properties of functionalized CNT areprimarily dependent on the amount of carboxyl groups. The sample treated with mixed acid at 70which has the highest amount of carboxyl groups, exhibits both high capacity and good rate capability.The additional capacity contributed by the reversible faradic reaction from the surface groups on CNTmake it possible to be assembled as a promising material in combining the distinguished properties ofbatteries and capacitors.
机译：研究了通过酸性试剂（硝酸以及硫酸和硝酸的混合物）氧化对碳纳米管（CNT）表面官能团的影响。然后研究了LiPF6 / EC + DMCE电解质中表面官能团数量与CNT的电化学性能之间的相关性。透射电子显微镜（TEM）和傅里叶变换红外分光光度计（FTIR）表明，在酸处理过程中成功引入了含氧表面基团，并且将高缠结的CNT长绳切成短的，开口的管道。通过酸碱滴定评估官能团的量。使用充电和放电测试以及循环伏安法（CV）表征样品的电化学行为。发现官能化的CNT的电化学性质主要取决于羧基的量。碳原子数最高的70％混合酸处理的样品具有高容量和良好的倍率性能.CNT表面基团可逆的法拉第反应带来的额外容量使其有可能被组装为有希望的材料。结合了电池和电容器的卓越性能。

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