The fascinating supercapacitive performance of activated carbon electrodes with enhanced energy density in multifarious electrolytes

2020 ◽  
Vol 4 (6) ◽  
pp. 3029-3041 ◽  
Author(s):  
M. Karnan ◽  
A. G. Karthick Raj ◽  
K. Subramani ◽  
S. Santhoshkumar ◽  
M. Sathish
Keyword(s):  
Activated Carbon ◽  
Energy Density ◽  
Power Density ◽  
Porous Carbon ◽  
High Energy ◽  
Carbon Electrodes ◽  
Supercapacitive Performance ◽  
Symmetric Supercapacitor

The effect of electrolytes on activated porous carbon was extensively studied using different electrolytes. A symmetric supercapacitor cell in redox additive electrolyte delivered a high energy (58.5 W h kg−1) and power density (9 kW kg−1).

scholarly journals Na0.76V6O15/Activated Carbon Hybrid Cathode for High-Performance Lithium-Ion Capacitors

Materials ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 122
Author(s):  
Renwei Lu ◽  
Xiaolong Ren ◽  
Chong Wang ◽  
Changzhen Zhan ◽  
Ding Nan ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Energy Density ◽  
Power Density ◽  
Cathode Materials ◽  
Low Cost ◽  
Lithium Ion ◽  
High Energy ◽  
Cycling Stability ◽  
High Energy Density ◽  
Artificial Graphite

Lithium-ion hybrid capacitors (LICs) are regarded as one of the most promising next generation energy storage devices. Commercial activated carbon materials with low cost and excellent cycling stability are widely used as cathode materials for LICs, however, their low energy density remains a significant challenge for the practical applications of LICs. Herein, Na0.76V6O15 nanobelts (NaVO) were prepared and combined with commercial activated carbon YP50D to form hybrid cathode materials. Credit to the synergism of its capacitive effect and diffusion-controlled faradaic effect, NaVO/C hybrid cathode displays both superior cyclability and enhanced capacity. LICs were assembled with the as-prepared NaVO/C hybrid cathode and artificial graphite anode which was pre-lithiated. Furthermore, 10-NaVO/C//AG LIC delivers a high energy density of 118.9 Wh kg−1 at a power density of 220.6 W kg−1 and retains 43.7 Wh kg−1 even at a high power density of 21,793.0 W kg−1. The LIC can also maintain long-term cycling stability with capacitance retention of approximately 70% after 5000 cycles at 1 A g−1. Accordingly, hybrid cathodes composed of commercial activated carbon and a small amount of high energy battery-type materials are expected to be a candidate for low-cost advanced LICs with both high energy density and power density.

High energy density of quasi-solid-state supercapacitor based on redox-mediated gel polymer electrolyte

RSC Advances ◽  
2016 ◽  
Vol 6 (60) ◽  
pp. 55225-55232 ◽  
Author(s):  
Kanjun Sun ◽  
Feitian Ran ◽  
Guohu Zhao ◽  
Yanrong Zhu ◽  
Yanping Zheng ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Solid State ◽  
Energy Density ◽  
Polymer Electrolyte ◽  
Gel Polymer Electrolyte ◽  
High Energy ◽  
High Energy Density ◽  
Symmetric Supercapacitor

A novel redox-mediated gel polymer (PVA–H2SO4–ARS) is prepared, and a symmetric supercapacitor using the gel polymer as electrolyte and activated carbon as electrode is also assembled.

MoO2 Nanoparticles Confined in N, P-codoped Graphene Aerogels with Excellent Pseudocapacitance Performance

2020 ◽  
Author(s):  
Jianfa Chen ◽  
Tianxiang Jin ◽  
Hangchun Deng ◽  
Jie Huang ◽  
Guangyuan Ren ◽  
...  
Keyword(s):  
Energy Density ◽  
Synergistic Effect ◽  
Power Density ◽  
High Specific Capacitance ◽  
High Energy ◽  
High Energy Density ◽  
Mass Loading ◽  
Cycle Stability ◽  
Graphene Aerogels ◽  
Symmetric Supercapacitor

In this work, MoO2@NPGA nanocomposites were successfully prepared via a simple hydrothermal and calcination route.The as-prepared MoO2@NPGA composites exhibit a synergistic effect between MoO2 and N, P codoped graphene aerogels, which can significantly improve the electrochemical performance of the MoO2@NPGA electrodes. Moreover, the results also proved that the mass loading of MoO2 has a huge effect on the electrochemical properties of MoO2@NPGA composites. With an appropriate amount of MoO2, the MoO2@NPGA composite shows a high specific capacitance (335 F g-1 at 1 A g-1) and excellent cycle stability (capacitance remains at 88% after 6000 cycles). Futhermore, the assembled symmetric supercapacitor displays a high energy density of 23.75 W h kg-1 at a power density of 300 W kg-1 and can maintain an energy density of 17.1 W h kg−1 when the power density reaches up to 6005 W kg−1.

Oxygen-enriched activated carbons from pomelo peel in high energy density supercapacitors

RSC Advances ◽  
2014 ◽  
Vol 4 (97) ◽  
pp. 54662-54667 ◽  
Author(s):  
Chao Peng ◽  
Junwei Lang ◽  
Shan Xu ◽  
Xiaolai Wang
Keyword(s):  
Activated Carbon ◽  
Energy Density ◽  
Activated Carbons ◽  
High Energy ◽  
High Energy Density ◽  
Pomelo Peel ◽  
Symmetric Supercapacitor ◽  
Porous Activated Carbon

Pomelo peel as biomass-derived porous activated carbon is used for the preparation of a high energy density symmetric supercapacitor.

Asymmetric electrochemical capacitors with high energy and power density based on graphene/CoAl-LDH and activated carbon electrodes

RSC Advances ◽  
2013 ◽  
Vol 3 (7) ◽  
pp. 2483 ◽  
Author(s):  
Weifeng Zhang ◽  
Chao Ma ◽  
Jihong Fang ◽  
Jipeng Cheng ◽  
Xiaobin Zhang ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Power Density ◽  
Electrochemical Capacitors ◽  
High Energy ◽  
Carbon Electrodes ◽  
Energy And Power Density

Is the conductive agent useful in electrodes of graphitized activated carbon?

RSC Advances ◽  
2016 ◽  
Vol 6 (103) ◽  
pp. 100708-100712 ◽  
Author(s):  
Yu-Tong Pi ◽  
Yin-Tao Li ◽  
Shan-Shan Xu ◽  
Xiang-Ying Xing ◽  
Hai-Kun Ma ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Energy Density ◽  
Power Density ◽  
High Energy ◽  
High Energy Density ◽  
Porous Structures ◽  
Conductive Agent ◽  
Power Densities

Partly graphitized AC materials are porous structures with high energy density and power density compared to commercial AC in the absence of conductive agent. Energy and power densities of 48.6 W h kg−1 and 3600 W kg−1 can be maintained at the potential window of 1.5 V.

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