scholarly journals Cauliflower-Like Co3O4/Three-Dimensional Graphene Composite for High Performance Supercapacitor Applications

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Huili Liu ◽  
Xinglong Gou ◽  
Yi Wang ◽  
Xuan Du ◽  
Can Quan ◽  
...  
Keyword(s):  
High Performance ◽  
Electrode Materials ◽  
Three Dimensional ◽  
Constant Current ◽  
Supercapacitor Electrode ◽  
3D Graphene ◽  
Graphene Composite ◽  
Transmission Electron ◽  
Constant Current Charge ◽  
Supercapacitor Electrode Materials

Cauliflower-like Co3O4/three-dimensional (3D) graphene nanocomposite material was synthesized by a facile two-step synthesis route (heat reduction of graphite oxide (GO) and hydrothermal synthesis of Co3O4). The phase composition, morphology, and structure of the as-obtained products were characterized by scanning electron microscopy (SEM), transmission electron microscope (TEM), and X-ray diffraction (XRD). Electrochemical properties as supercapacitor electrode materials were systematically investigated by cyclic voltammetry (CV) and constant current charge-discharge tests. It was found that the Co3O4/3D graphene composite showed a maximum specific capacitance of 863 F g−1, which was obtained by means of CVs at a scan rate of 1 mV s−1in 6 M KOH aqueous solution. Moreover, the composite exhibited improved cycling stability after 1,000 cycles. The good supercapacitor performance is ascribed to the combination of 3D graphene and cauliflower-like Co3O4, which leads to a strong synergistic effect to remarkably boost the utilization ratio of Co3O4and graphene for high capacitance.

A Facile Synthesis of NiFe2O4 with High Specific Capacitance as Supercapacitor Electrode Material

2018 ◽  
Vol 281 ◽  
pp. 854-858
Author(s):  
Xi Cheng Gao ◽  
Jian Qiang Bi ◽  
Wei Li Wang ◽  
Guo Xun Sun ◽  
Xu Xia Hao ◽  
...  
Keyword(s):  
Particle Size ◽  
Specific Capacitance ◽  
Electrochemical Property ◽  
Electrode Materials ◽  
High Specific Capacitance ◽  
Constant Current ◽  
X Ray Diffraction ◽  
Supercapacitor Electrode ◽  
Constant Current Charge ◽  
Supercapacitor Electrode Materials

NiFe2O4 powders were synthesized by a facile hydrothermal method at 180°C followed by a thermal treatment at 300°C. The phase composition and morphology were analyzed by X-ray diffraction (XRD) and scanning electron microscope (SEM). The results showed that the NiFe2O4 powders were well-crystallized, and they possessed a particle size in the range of 50-100 nm. The electrochemical property was characterized via cyclic voltammetry (CV) and constant current charge-discharge method. Encouragingly, the NiFe2O4 powders had an excellent electrochemical property, whose specific capacitance reached 266.84 F/g at the electric current density of 1 A/g due to the small particle size. Compared with other Fe-based metal compound oxides, NiFe2O4 has a better electrochemical performance, which can be widely used in the supercapacitor electrode materials.

A one-step, cost-effective green method to in situ fabricate Ni(OH)2 hexagonal platelets on Ni foam as binder-free supercapacitor electrode materials

2015 ◽  
Vol 3 (5) ◽  
pp. 1953-1960 ◽  
Author(s):  
Lingjie Li ◽  
Jing Xu ◽  
Jinglei Lei ◽  
Jie Zhang ◽  
Frank McLarnon ◽  
...  
Keyword(s):  
High Performance ◽  
Electrode Materials ◽  
Three Dimensional ◽  
Cost Effective ◽  
Ni Foam ◽  
Supercapacitor Electrode ◽  
One Step ◽  
Binder Free ◽  
Supercapacitor Electrode Materials

The Ni(OH)2 hexagonal platelets were in situ fabricated on Ni foam as a binder-free supercapacitor electrode material with high performance and excellent cycling stability by a one-step, cost-effective, green hydrothermal treatment of three-dimensional (3D) Ni foam in a 15 wt% H2O2 aqueous solution.

A yolk–shell V2O5 structure assembled from ultrathin nanosheets and coralline-shaped carbon as advanced electrodes for a high-performance asymmetric supercapacitor

2018 ◽  
Vol 47 (7) ◽  
pp. 2256-2265 ◽  
Author(s):  
Ling-Li Xing ◽  
Gang-Gang Zhao ◽  
Ke-Jing Huang ◽  
Xu Wu
Keyword(s):  
Hydrothermal Method ◽  
High Performance ◽  
Electrode Materials ◽  
Three Dimensional ◽  
Asymmetric Supercapacitor ◽  
Supercapacitor Electrode ◽  
Ultrathin Nanosheets ◽  
Template Free ◽  
Supercapacitor Electrode Materials

Various V2O5 three-dimensional nanostructures are synthesized using a facile template-free hydrothermal method and evaluated for use as supercapacitor electrode materials.

Three-dimensional graphitic carbon nitride functionalized graphene-based high-performance supercapacitors

2015 ◽  
Vol 3 (13) ◽  
pp. 6761-6766 ◽  
Author(s):  
Qing Chen ◽  
Yang Zhao ◽  
Xianke Huang ◽  
Nan Chen ◽  
Liangti Qu
Keyword(s):  
High Performance ◽  
Carbon Nitride ◽  
Electrode Materials ◽  
Three Dimensional ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Functionalized Graphene ◽  
Supercapacitor Electrode ◽  
One Step ◽  
Supercapacitor Electrode Materials

A one-step strategy for the development of graphitic-C3N4 functionalized graphene composites as advanced three-dimensional supercapacitor electrode materials.

NiMoO4 nanorods supported on nickel foam for high-performance supercapacitor electrode materials

2018 ◽  
Vol 10 (5) ◽  
pp. 054101 ◽  
Author(s):  
Yong Zhang ◽  
Hai-li Gao ◽  
Xiao-dong Jia ◽  
Shi-wen Wang ◽  
Ji Yan ◽  
...  
Keyword(s):  
High Performance ◽  
Electrode Materials ◽  
Nickel Foam ◽  
Supercapacitor Electrode ◽  
Supercapacitor Electrode Materials
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