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[資源]
合成用于超級(jí)電容器的三維有序的大孔二氧化錳-碳納米復(fù)合材料
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Synthesis of three-dimensionally ordered macroporous manganese dioxideecarbon nanocomposites for supercapacitors,Journal of Power Sources 267(2014)812-820. 影響因子:5.211 摘要:In this article, we report a composite of MnO2 nanoparticles supported by three-dimensionally ordered macroporous carbon (MnO2/3DOM carbon nanocomposites) fabricated by means of a simple multicomponent infiltration of three-dimensional templates. MnO2 nanoparticles of 2 nm-6 nm are observed to be highly dispersed on the 3DOM carbon scaffolds. Cyclic voltammetry, galvanostatic charge/discharge and electrochemical impedance spectroscopy techniques are employed to assess the properties of these nanocomposites for use in supercapacitors. The results demonstrate that MnO2 can beeffectively utilized with assistance of the 3DOM carbon in the electrode. The specific capacitance of the nanocomposite electrode can reach as high as 347 F g-1 at a current density of 0.5 A g-1. Moreover, the electrode exhibit excellent charge/discharge rate and good cycling stability, retaining over 92% of its initial charge after 5500 cycles at a current density of 2.5 A g-1. Such MnO2/3DOM carbon nanocomposite represents a promising exploring direction for enhancing the device performance of metal oxide-based electrochemical supercapacitors. 中文翻譯摘要:本文章中,我們報(bào)道了一種支撐在三維有序的大孔碳上的MnO2納米顆粒復(fù)合材料(MnO2/3DOM 碳納米復(fù)合材料),該材料通過一種簡(jiǎn)單的功能組分滲透三維模板的方法制備。觀察到2nm-6nm的MnO2納米顆粒高度分散在3DOM碳支架上。循環(huán)伏安法、恒電流充/放電和電化學(xué)交流阻抗譜用于評(píng)估這些納米復(fù)合材料用于超級(jí)電容器的性能。結(jié)果表明MnO2可以有效利用電極中3DOM碳的協(xié)助。納米復(fù)合材料電極的比電容在電流密度為0.5Ag-1時(shí)可以高達(dá)347Fg-1。此外,電極呈現(xiàn)很好的充/放電速率和好的循環(huán)穩(wěn)定性,在電流密度2.5Ag-1循環(huán)5500次后保持首次充電量的92%以上。這種MnO2/3DOM碳納米復(fù)合材料用于增強(qiáng)金屬氧化物基電化學(xué)超級(jí)電容器設(shè)備性能具有很大的前景。 想獲得更多資源可點(diǎn)擊鏈接http://www.tjdrfk.com/news 圖片4.jpg 圖片1.jpg 圖片2.jpg 圖片3.jpg |
無機(jī)非金屬功能材料 |
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