Monolayer graphene/NiO nanosheets with two-dimension structure for supercapacitors

被引：307

作者：

Zhao, Bing ^{[1
]}

Song, Jinsong ^{[1
]}

Liu, Peng ^{[1
]}

Xu, Weiwen ^{[1
]}

Fang, Tao ^{[1
]}

Jiao, Zheng ^{[1
]}

Zhang, Haijiao ^{[1
]}

Jiang, Yong ^{[1
]}

机构：

[1] Shanghai Univ, Sch Environm & Chem Engn, Shanghai 200444, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2011年 / 21卷 / 46期

基金：

上海市自然科学基金;

关键词：

CARBON NANOTUBES; REVERSIBLE CAPACITY; ANODE MATERIAL; COMPOSITE; OXIDE; DESIGN; NANOPARTICLES; ELECTRODES; REDUCTION; RUO2;

D O I：

10.1039/c1jm13016a

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this paper, graphene oxide (GO) synthesized from the modified Hummer method is used directly to fabricate unique two-dimension graphene/NiO composite material. Nickel ions are adsorbed on both sides of GO based on self-assembly by the electrostatic interactions of two species, forming the monolayer graphene/NiO sheet. The as-prepared composite is characterized using X-ray diffraction (XRD), Raman, SEM, TEM, Energy Dispersive Spectrometer (EDS) analysis and nitrogen adsorption/desorption. The results demonstrate that the NiO nanoparticles (5-7 nm) is uniformly dispersed on the surface of graphene, which greatly increases the surface area of the composite (134.5 m(2) g(-1)). This two-dimensional structure enhances supercapacitive performance with a high specific capacitance of 525 F g(-1) at a current density of 200 mA g(-1). A capacity retention of 95.4% can be maintained after 1000 cycles, suggesting its promising potential in supercapacitors.

引用

页码：18792 / 18798

页数：7

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