Novel corn cob-like Fe3O4@Ni3S2 as high-performance electrode for supercapacitors

2017 ◽  
Vol 10 (05) ◽  
pp. 1750062 ◽  
Author(s):  
An Ye ◽  
Yanwei Sui ◽  
Yongpeng Han ◽  
Zhi Sun ◽  
Jiqiu Qi ◽  
...  
Keyword(s):  
High Performance ◽  
Nickel Sulfide ◽  
Hydrothermal Process ◽  
Corn Cob ◽  
Excellent Performance ◽  
Discharge Current Density ◽  
Oxide Composites ◽  
Supercapacitor Applications ◽  
Maximum Specific Capacitance ◽  
Charge Discharge

Corn cob-like Fe3O4@Ni3S2 nanocomposites was synthesized through a facile two-step hydrothermal process. The precursor was obtained by a facile calcination of a Fe-MOF template, then, nickel sulfide coated on iron oxide composites were synthesized using a hydrothermal method. In addition, the fabricated Fe3O4@Ni3S2 electrode revealed a great electrical performances with a maximum specific capacitance of 1200[Formula: see text]F[Formula: see text]g[Formula: see text] at 1[Formula: see text]A[Formula: see text]g[Formula: see text], a capacitance retention of 83% could be observed after 1000 cycles at a great charge–discharge current density of 5[Formula: see text]A[Formula: see text]g[Formula: see text]. We believed that the excellent performance might be ascribed to the synergistic effect between the Fe3O4and Ni3S2. Thus, the results demonstrate the corn cob-like Fe3O4@Ni3S2 composite is prominent candidate in the field of supercapacitor applications.

Unusual morphologies of reduced graphene oxide and polyaniline nanofibers-reduced graphene oxide composites for high performance supercapacitor applications

RSC Advances ◽  
2014 ◽  
Vol 4 (43) ◽  
pp. 22551-22560 ◽  
Author(s):  
Rahul S. Diggikar ◽  
Dattatray J. Late ◽  
Bharat B. Kale
Keyword(s):  
Graphene Oxide ◽  
Electrochemical Performance ◽  
Reduced Graphene Oxide ◽  
High Performance ◽  
Polyaniline Nanofibers ◽  
Pani Nanofibers ◽  
Reduced Graphene ◽  
Oxide Composites ◽  
Enhanced Electrochemical Performance ◽  
Supercapacitor Applications

The unique morphologies of reduced graphene oxide (RGO) and RGO–PANI nanofibers (NF) composites have been demonstrated. The enhanced electrochemical performance was observed for honeycomb like RGO–PANI NFs composites.

The Preparation of Hierarchical Flowerlike NiO/Reduced Graphene Oxide Composites for High Performance Supercapacitor Applications

2013 ◽  
Vol 27 (10) ◽  
pp. 6304-6310 ◽  
Author(s):  
Wei Li ◽  
Yongfeng Bu ◽  
Huile Jin ◽  
Jian Wang ◽  
Weiming Zhang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
High Performance ◽  
Reduced Graphene ◽  
Oxide Composites ◽  
Supercapacitor Applications

Hierarchically Porous Carbon/MnO2 Nanocomposites as High-Performance Electrode for Asymmetric Supercapacitors

2014 ◽  
Vol 1070-1072 ◽  
pp. 530-533
Author(s):  
Yu Rong Liu ◽  
Jia Liu
Keyword(s):  
Porous Carbon ◽  
High Performance ◽  
Asymmetric Supercapacitor ◽  
X Ray Diffraction ◽  
Excellent Performance ◽  
Asymmetric Supercapacitors ◽  
Hierarchically Porous ◽  
X Ray ◽  
Supercapacitor Applications ◽  
Scanning Electron

Hierarchically porous carbon (HPC)/MnO2 nanocomposites were fabricated for asymmetric supercapacitor applications. The microstructures of HPC/MnO2 nanocomposites were characterized by X-ray diffraction and scanning electron microscopy. The asymmetric supercapacitor consisting of a HPC/MnO2 cathode and a HPC anode shows an excellent performance with energy density and power density of 23.8 Wh kg-1 and 12.5 kW kg-1, respectively. In addition, the asymmetric supercapacitor exhibits an excellent cycle life with 91% retention of capacitance after 1000 cycles.

Effects of Deposition Temperatures on the Nanoflakes Co(OH)2 Porous Films for Supercapacitors

2011 ◽  
Vol 694 ◽  
pp. 214-218
Author(s):  
Zhan Jun Yu ◽  
Bin Bin Wang ◽  
Rong Bao Liao ◽  
Yu Min Cui
Keyword(s):  
Specific Capacitance ◽  
Electrochemical Impedance ◽  
Electrochemical Techniques ◽  
High Specific Capacitance ◽  
Electrochemical Technique ◽  
Porous Films ◽  
Discharge Current Density ◽  
A Charge ◽  
Maximum Specific Capacitance ◽  
Charge Discharge

Nanoflakes Co(OH)2 porous films were successfully synthesized by a facile electrochemical technique. The morphology was characterized by field emission scanning electron microscopy (FESEM). Electrochemical techniques such as cyclic voltammetry (CV), galvanostaitc charge/discharge and electrochemical impedance spectroscopy were used to study the effects of deposition temperatures on the capacitance of the films. The results exhibited that the Co(OH)2 films single electrode had high specific capacitance in KOH electrolyte. A maximum specific capacitance of 2780 F/g could be achieved for the Co(OH)2 film deposited at 50°C in 2 M aqueous KOH with 0 to 0.4V potential at a charge-discharge current density of 4 mA/cm2. Therefore, the obtained nanoflakes Co(OH)2 porous films can be a potential application electrode material for supercapacitors.

High performance Cr, N-codoped mesoporous TiO2 microspheres for lithium-ion batteries

2014 ◽  
Vol 2 (6) ◽  
pp. 1818-1824 ◽  
Author(s):  
Zhonghe Bi ◽  
M. Parans Paranthaman ◽  
Bingkun Guo ◽  
Raymond R. Unocic ◽  
Harry M. Meyer III ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Titanium Oxide ◽  
High Performance ◽  
Hydrothermal Process ◽  
Lithium Ion ◽  
Mesoporous Tio2 ◽  
Tio2 Microspheres ◽  
Simple Hydrothermal Process ◽  
Charge Discharge ◽  
Excellent Stability

We develop a simple hydrothermal process followed by post-nitridation treatment for the synthesis of chromium, nitrogen-codoped titanium oxide, which exhibits a remarkable charge–discharge capacity at a rate of 5 C and shows an excellent stability for over 300 cycles as an anode material for lithium ion batteries.

Synthesis of MnO2 nanostructures with MnS-deposits for high performance supercapacitor electrodes

2019 ◽  
Vol 43 (33) ◽  
pp. 12987-13000 ◽  
Author(s):  
Rajesh Rajagopal ◽  
Kwang-Sun Ryu
Keyword(s):  
High Performance ◽  
Hydrothermal Process ◽  
One Step ◽  
Supercapacitor Applications

We report the synthesis of MnO2 nanostructures with MnS deposits via a facile one-step hydrothermal process for high-performance supercapacitor applications.

Synthesis and Characterization of Nanoflakes β-Ni(OH)2 Microspheres for Supercapacitors

2011 ◽  
Vol 230-232 ◽  
pp. 306-309 ◽  
Author(s):  
Zhan Jun Yu ◽  
Ying Dai ◽  
Wen Chen
Keyword(s):  
Specific Capacitance ◽  
Electrochemical Impedance ◽  
High Specific Capacitance ◽  
X Ray Diffraction ◽  
Discharge Current Density ◽  
X Ray ◽  
A Charge ◽  
Maximum Specific Capacitance ◽  
Charge Discharge

Nanoflakes β-Ni(OH)2microspheres were successfully synthesized by a facile hydrothermal. The microstructures and morphology were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Electrochemical properties studies were carried out using cyclic voltammetry (CV), galvanostaitc charge/discharge and electrochemical impedance spectroscopy methods, respectively. The results exhibited that the β-Ni(OH)2single electrode had high specific capacitance in KOH electrolyte. A maximum specific capacitance of 1929 F/g could be achieved in 6 M aqueous KOH with 0 to 0.4 V potential at a charge-discharge current density of 6 mA/cm2. Therefore, the obtained nanoflakes β-Ni(OH)2microspheres can be a potential application electrode material for supercapacitors.

scholarly journals Interconnected hierarchical NiCo2O4 microspheres as high-performance electrode materials for supercapacitors

2017 ◽  
Vol 46 (28) ◽  
pp. 9201-9209 ◽  
Author(s):  
Ming Cheng ◽  
Hongsheng Fan ◽  
Yuanjun Song ◽  
Yimin Cui ◽  
Rongming Wang
Keyword(s):  
High Performance ◽  
Electrode Materials ◽  
Excellent Performance ◽  
Supercapacitor Applications

Hierarchical NiCo2O4 microspheres with large tunnels and abundant mesopores have been prepared, and they exhibit excellent performance in supercapacitor applications.

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