MnO2/graphene/nickel foam composite as high performance supercapacitor electrode via a facile electrochemical deposition strategy

MnO2/graphene/nickel foam composite as high performance supercapacitor electrode via a facile electrochemical deposition strategy
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通过简单的电化学沉积策略,MnO2/石墨烯/泡沫镍复合材料作为高性能超级电容器电极

DOI:
10.1016/j.matlet.2012.02.097
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发表时间:
2012-06
期刊:
影响因子:
3
通讯作者:
Li, Hu-Lin
Li, Hu-Lin
中科院分区:
材料科学3区
文献类型:
--
作者:
Zhao, Yong-Qing;Zhao, Dan-Dan;Tang, Peng-Yi;Wang, Yin-Mel;Xu, Cai-Ling;Li, Hu-Lin

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首次采用电化学沉积法制备了一种新型的MnO 2/石墨烯(G)/泡沫镍(NF)复合材料作为超级电容器电极。该方法包括在NF上电泳沉积G(EPD-G/NF)和在EPD-G/NF上电沉积MnO 2(MnO 2/EPD-G/NF)。与其他制备MnO 2/G复合材料的方法相比,我们的绿色策略避免了使用苛刻的化学品(例如肼)或高温处理来还原氧化石墨烯。由于其独特的结构,在0.5M的Na 2SO 4溶液中,当电流密度为1Ag-1时,MnO 2/EPD-G/NF电极的比电容(Cs)高达476 Fg-1,是目前MnO 2/G复合材料的最高值,且比MnO 2/NF电极的Cs更高。此外,它还具有高倍率容量,例如Csat 10Ag−1的216 Fg − 1。另一方面,我们的策略提供了一种通用的方法,用于制造其他G基复合材料与金属氧化物/氢氧化物或导电聚合物作为超级电容器电极。
A novel MnO2/graphene (G)/nickel foam (NF) composite as supercapacitor electrode was fabricated by a facile electrochemical deposition approach for the first time. The approach includes electrophoretic deposition of G on NF (EPD-G/NF) and electrodeposition of MnO2on EPD-G/NF (MnO2/EPD-G/NF). Compared with other methods for preparing MnO2/G composite, our green strategy avoids using harsh chemicals (e.g. hydrazine) or high temperature treatment for reducing graphene oxide. Owing to unique structure, specific capacitance (Cs) of the MnO2/EPD-G/NF electrode is as high as 476Fg−1at high current density of 1Ag−1in 0.5M Na2SO4solution, which is the highest Csfor MnO2/G composites to date, and the Csis higher than that of MnO2/NF electrode. Furthermore, it also exhibits high rate capacity, such as 216Fg−1of Csat 10Ag−1. On the other hand, our strategy provides a versatile method for fabrication of other G-based composites with metal oxide/hydroxide or conducting polymer as supercapacitor electrode.
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