Facile synthesis of pyrite (FeS2/C) nanoparticles as an electrode material for non-aqueous hybrid electrochemical capacitors

Nanoscale ◽  
2018 ◽  
Vol 10 (13) ◽  
pp. 5938-5949 ◽  
Author(s):  
Duong Tung Pham ◽  
Joseph Paul Baboo ◽  
Jinju Song ◽  
Sungjin Kim ◽  
Jeonggeun Jo ◽  
...  
Keyword(s):  
Electrode Material ◽  
Electrochemical Capacitors ◽  
Electrochemical Capacitor ◽  
Facile Synthesis ◽  
Power Densities

FeS2/C electrode of a non-aqueous hybrid electrochemical capacitor (NHEC FeS2/C||AC) demonstrated competitive energy/power densities and stable long-term cycling.

Material Characteristics and the Performance of Electrochemical Capacitors for Electric/Hybrid Vehicle Applications

1995 ◽  
Vol 393 ◽  
Author(s):  
A.F. Burke ◽  
T.C. Murphy
Keyword(s):  
Specific Capacitance ◽  
High Power ◽  
Electrode Material ◽  
Voltage Drop ◽  
Chemical Change ◽  
Electrochemical Capacitors ◽  
Electrochemical Capacitor ◽  
Polymer Materials ◽  
Constant Current ◽  
Organic Electrolytes

ABSTRACTElectrochemical capacitors (ultracapacitors) are one approach to meeting the high power requirements for the energy storage system in an electric vehicle. Energy is stored in an electrochemical capacitor by charge separation in the double layer formed in the micropores of a very high surface area electrode material, which does not undergo chemical change as in a battery. Consequently, the material requirements for capacitors are very different from those of batteries. In the last several years, a number of promising material technologies have been identified for use in electrochemical capacitors. These include activated carbon fibers, foams, and composites, doped conducting polymers, and mixed metal oxides. The most important material property is its specific capacitance (F/gm or F/cm3). Carbon materials with specific capacitances of 100 to 300 F/gm have been developed. Doped polymer materials having specific capacitances of 300 to 400 F/gm are also being studied. In addition to high specific capacitance, the electrode material must also have a low electronic resistivity ( < 0.1 Ω-cm) in order that charge can be distributed with minimum voltage drop in the electrode. Electrochemical capacitor cells have been fabricated using the various material technologies with both aqueous and organic electrolytes. Tests of the cells have shown near ideal charge/discharge characteristics — that is, the voltage versus time curves are nearly linear for constant current tests. The energy densities of 1 V cells, using aqueous electrolytes, are 1 to 1.5 W-h/kg and those of 3 V cells, using organic electrolytes are 7 to 10 W-h/kg. Most of the cells have high power densities of 1 to 3 kW/kg. Numerous new materials for electrochemical capacitors have been identified, processed, and tested in electrodes and cells in recent years and progress is rapid in this relatively new field of research.

A facile synthetic protocol of α-Fe2O3@FeS2 nanocrystals for advanced electrochemical capacitors

CrystEngComm ◽  
2021 ◽  
Vol 23 (12) ◽  
pp. 2432-2438 ◽  
Author(s):  
Qing Xia ◽  
Tong Xia ◽  
Meizhen Dai ◽  
Xiang Wu ◽  
Yufeng Zhao
Keyword(s):  
Charge Transfer ◽  
Electrode Material ◽  
Electrochemical Capacitors ◽  
Cyclic Stability ◽  
Hydrothermal Route ◽  
One Pot

In this work, we report granular α-Fe2O3@FeS2 nanocrystals by a one-pot hydrothermal route. The as-obtained product as an electrode material shows excellent charge transfer ability and cyclic stability.

The influences of operating conditions and design configurations on the performance of symmetric electrochemical capacitors

2016 ◽  
Vol 18 (41) ◽  
pp. 28626-28647 ◽  
Author(s):  
Innocent S. Ike ◽  
Iakovos Sigalas ◽  
Sunny E. Iyuke
Keyword(s):  
Energy Density ◽  
Power Density ◽  
Electrochemical Capacitors ◽  
Electrochemical Capacitor ◽  
Operating Conditions ◽  
Modelling And Simulation ◽  
Charging Current ◽  
Current Densities

The influence of different charging current densities, charging times and several structural designs on symmetric electrochemical capacitor (EC) performance, including capacitance, energy density and power density, has been investigated via modelling and simulation.

Highly Porous Carbon Derived from Sunflower Seed Shell for Electrochemical Capacitor

2011 ◽  
Vol 287-290 ◽  
pp. 1420-1423 ◽  
Author(s):  
Wei Xing ◽  
Xiao Li ◽  
Xiu Li Gao ◽  
Shu Ping Zhuo
Keyword(s):  
Pore Structure ◽  
Electrode Material ◽  
Sunflower Seed ◽  
High Performance ◽  
Chemical Activation ◽  
Electrochemical Capacitor ◽  
Drain Current ◽  
Porous Carbons ◽  
Activation Temperature ◽  
Highly Porous

Highly porous carbons were prepared from sunflower seed shell (SSS) by chemical activation and used as electrode material for electrochemical double layer capacitor (EDLC). The surface area and pore structure of the porous carbons are characterized intensively using N2 adsorption technique. The results show that the pore-structure of the carbons is closely related to activation temperature. Electrochemical measurements show that the carbons have excellent capacitive behavior and high capacitance retention ratio at high drain current, which is due to that there are both abundant macroscopic pores and micropore surface in the texture of the carbons. More importantly, the capacitive performances of these carbons are much better than ordered mesoporous carbons, thus highlighting the success of preparing high performance electrode material for EDLC from SSS.

Nanostructured V2O5 and its nanohybrid with MXene as an efficient electrode material for electrochemical capacitor applications

2021 ◽  
Author(s):  
Majid Mahmood ◽  
Sonia Zulfiqar ◽  
Muhammad Farooq Warsi ◽  
Muhammad Aadil ◽  
Imran Shakir ◽  
...  
Keyword(s):  
Electrode Material ◽  
Electrochemical Capacitor

Facile synthesis of CuCo2S4 as a novel electrode material for ultrahigh supercapacitor performance

2016 ◽  
Vol 52 (7) ◽  
pp. 1509-1512 ◽  
Author(s):  
Jianhua Tang ◽  
Yuancai Ge ◽  
Jianfeng Shen ◽  
Mingxin Ye
Keyword(s):  
Electrode Material ◽  
Electrochemical Performances ◽  
Facile Synthesis ◽  
Supercapacitor Performance

CuCo2S4 nanoparticles demonstrating outstanding electrochemical performances were firstly synthesized through a simple solvothermal approach without using any templates.

Fe2O3 sheets grown on nickel foam as electrode material for electrochemical capacitors

2014 ◽  
Vol 713 ◽  
pp. 98-102 ◽  
Author(s):  
Jichun Huang ◽  
Sainan Yang ◽  
Yang Xu ◽  
Xiaobin Zhou ◽  
Xue Jiang ◽  
...  
Keyword(s):  
Electrode Material ◽  
Nickel Foam ◽  
Electrochemical Capacitors
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