Synthesis of MnO2/graphene/carbon nanotube nanostructured ternary composite for supercapacitor electrodes with high rate capability

Synthesis of MnO2/graphene/carbon nanotube nanostructured ternary composite for supercapacitor electrodes with high rate capability
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高倍率超级电容器电极用MnO2/石墨烯/碳纳米管纳米结构三元复合材料的合成

DOI:
10.1016/j.matchemphys.2014.04.020
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发表时间:
2014-09
影响因子:
4.6
通讯作者:
Li, Shulei
Li, Shulei
中科院分区:
材料科学3区
文献类型:
--
作者:
Liu, Yongchuan;He, Dawei;Duan, Jiahua;Wang, Yongsheng;Li, Shulei

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通过简单的化学方法合成了一种由二氧化锰(MnO 2)纳米颗粒修饰并由碳纳米管(CNT)互连的石墨烯纳米片(GNS)复合材料。SEM结果表明,MnO 2纳米颗粒(尺寸为50-80 nm)均匀分布在石墨烯纳米片上,并通过CNT实现了良好的互连性。MnO 2/GNS/CNTs电极表现出优异的倍率性能和显著改善的循环稳定性(1000次循环后仍保持95%的容量),并且对于纳米级MnO 2获得了240 F g− 1的高电容。此外,MnO 2/GNS/CNTs复合材料的合成方法简单,并且可以容易地放大到真实的工业制造。
A composite of graphene nanosheets (GNS) decorated with manganese dioxide (MnO2) nanoparticles and interconnected by carbon nanotubes (CNTs) has been synthesized through a facile chemical method. SEM results suggest a homogeneous distribution of MnO2nanoparticles (50–80 nm in size) on graphene nanosheets and excellent interconnectivity by CNTs. The MnO2/GNS/CNTs electrode exhibits excellent rate capability and significantly improved cycling stability (95% capability retained after 1000 cycles), and a high capacitance of 240 F g−1is obtained for nanoscale MnO2. In addition, the method for the synthesis of MnO2/GNS/CNTs composites is simple and can be easily scaled up to real industrial manufacturing.
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