In situ assembly of MnO2 nanowires/graphene oxide nanosheets composite with high specific capacitance

2014 ◽  
Vol 116 ◽  
pp. 111-117 ◽  
Author(s):  
Kai Dai ◽  
Luhua Lu ◽  
Changhao Liang ◽  
Jianming Dai ◽  
Qinzhuang Liu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Specific Capacitance ◽  
High Specific Capacitance ◽  
Graphene Oxide Nanosheets ◽  
Mno2 Nanowires

scholarly journals Dissected carbon nanotubes functionalized by 1-hydroxyanthraquinone for high-performance asymmetric supercapacitors

RSC Advances ◽  
2017 ◽  
Vol 7 (76) ◽  
pp. 48341-48353 ◽  
Author(s):  
Xia Yang ◽  
Yuying Yang ◽  
Quancai Zhang ◽  
Xiaotong Wang ◽  
Yufeng An ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Graphene Oxide ◽  
Specific Capacitance ◽  
Reduced Graphene Oxide ◽  
High Performance ◽  
Rate Capability ◽  
High Specific Capacitance ◽  
Covalent Modification ◽  
Asymmetric Supercapacitors ◽  
Reduced Graphene

1-Hydroxyanthraquinone (HAQ) is selected to functionalize the dissected carbon nanotubes (rDCNTs) with reduced graphene oxide layers through non-covalent modification. The composite achieves high specific capacitance and ultrahigh rate capability.

Graphene Oxide/Fe3O4 Composites Prepared via In Situ Precipitation

2014 ◽  
Vol 904 ◽  
pp. 150-154
Author(s):  
Zhe Wei Yang ◽  
Xin Fan ◽  
Li Ang Guo ◽  
Wei Ting Wei
Keyword(s):  
Graphene Oxide ◽  
Specific Capacitance ◽  
Precipitation Method ◽  
Electrochemical Performances ◽  
Composite Electrodes ◽  
X Ray Diffraction ◽  
Bonding Force ◽  
X Ray

The graphene oxide/Fe3O4 composites were prepared by in situ precipitation method in this article. The microstructure and surface morphology of composites were characterized by Fourier transform infrared spectrum, X-ray diffraction and scanning electron microscopy, respectively. Cyclic voltammetry was employed for the determination of specific capacitance and other electrochemical performances. It was shown that there was the chemical bonding force between GO and Fe3O4 particles. And the surfaces of GO were wrapped by the Fe3O4 particles precipitated on the surfaces of GO sheets and no impurities were detected. Furthermore, the specific capacitance of GO/Fe3O4 composite electrodes decreased as Fe3O4 particles reduced and the redox peaks became weaker owing to the addition of nonconductive Fe3O4 particles.

High Specific Capacitance and Energy density of Synthesized Graphene Oxide based Hierarchical Al2S3 Nanorambutan for Supercapacitor Applications

2017 ◽  
Vol 246 ◽  
pp. 1097-1103 ◽  
Author(s):  
Muhammad Faisal Iqbal ◽  
Mahmood-Ul-Hassan ◽  
Muhammad Naeem Ashiq ◽  
Shahid Iqbal ◽  
Nasreen Bibi ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Energy Density ◽  
Specific Capacitance ◽  
High Specific Capacitance ◽  
Supercapacitor Applications

scholarly journals Tremella-like NiO microspheres embedded with fish-scale-like polypyrrole for high-performance asymmetric supercapacitor

RSC Advances ◽  
2019 ◽  
Vol 9 (38) ◽  
pp. 21608-21615 ◽  
Author(s):  
Kehui Han ◽  
Yan Liu ◽  
Hui Huang ◽  
Qinghua Gong ◽  
Zhiliang Zhang ◽  
...  
Keyword(s):  
Specific Capacitance ◽  
High Performance ◽  
High Specific Capacitance ◽  
Fish Scale ◽  
Asymmetric Supercapacitor ◽  
Solvothermal Process

Tremella-like NiO/fish-scale-like PPy was fabricated via a solvothermal process coupled with in situ polymerization. The NiO/PPy-6//AC asymmetric supercapacitor can achieve a high specific capacitance and maintain a specific capacitance at 88.2% after 10 000 cycles.

Nanocomposite Sheets Composed of Polyaniline Nanoparticles and Graphene Oxide as Electrode Materials for High-performance Supercapacitor

2018 ◽  
Vol 21 (2) ◽  
pp. 097-102
Author(s):  
Shuhua Pang ◽  
Weiliang Chen ◽  
Zhewei Yang ◽  
Zheng Liu ◽  
Xin Fan ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Specific Capacitance ◽  
High Performance ◽  
Electrode Materials ◽  
Monomer Concentration ◽  
High Specific Capacitance ◽  
Chemical Oxidation ◽  
Aniline Monomer ◽  
Chemical Oxidation Polymerization ◽  
Fast Ion

Composite materials based on the combination of graphene oxide and PANI are expected not only to improve the PANI conductivity, but also relieve graphene oxide aggregation via a synergistic effect. We report an easy synthesis of a polyaniline/graphene oxide (PGO) composite with a relatively high specific capacitance by chemical oxidation polymerization. As the employ of phytic acid and increasing aniline monomer concentration, more and more PANI nanoparticles deposited into the interval between GO layers. PGO3 composite exhibits the largest specific capacitance (349 F·g-1) and PGO4 composite follows (314 F·g-1), whereas PGO has a minimal specific capacitance (206 F·g-1). The enhanced capacitance originates from the high capacitance of more PANI nanoparticles and better configuration as well as higher surface area of PGO3 and PGO4 composites for fast ion transport. The as-prepared PGO3 sheets composite with improved electrochemical performance is a promising electrode material for supercapacitor.

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