scholarly journals High Energy Density Polyaniline/Exfoliated Graphite Based Supercapacitor with Improved Stability in Wide Voltage Window

2021 ◽  
Vol 37 (2) ◽  
pp. 450-458
Author(s):  
Sayed Mohammed Adnan ◽  
Sadaf Zaidi ◽  
Inamuddin I
Keyword(s):  
Energy Density ◽  
High Voltage ◽  
Aqueous Electrolyte ◽  
Low Cost ◽  
High Energy ◽  
High Energy Density ◽  
Exfoliated Graphite ◽  
Improved Stability ◽  
The Stability ◽  
Conducting Polymer Composites

In this work, polyaniline/exfoliated graphite-based conducting polymer composites have been prepared and brought under speculation to improve the stability at a high voltage window, ultimately improving the material's supercapacitance behavior. The specific capacitance of 356 F/g at a scan rate of 10 mV/s in the potential window -1V to +1V and cycling retention 82 % after 1000 cycles using aqueous electrolyte (0.1 M Na2SO4) at ambient condition is reported. The energy density and power density are found to be 318 Wh/kg and 12.5 kW/kg, respectively, at a specific current density of 12.5 A/g. The developedcomposite is stable, even at high voltage. This composite obtained is low cost and is stable in aqueous solutions in a wide voltage window.

Low-cost and high energy density asymmetric supercapacitors based on polyaniline nanotubes and MoO3 nanobelts

2014 ◽  
Vol 2 (27) ◽  
pp. 10384-10388 ◽  
Author(s):  
Hui Peng ◽  
Guofu Ma ◽  
Jingjing Mu ◽  
Kanjun Sun ◽  
Ziqiang Lei
Keyword(s):  
Energy Density ◽  
Aqueous Electrolyte ◽  
Low Cost ◽  
High Energy ◽  
High Energy Density ◽  
Asymmetric Supercapacitors ◽  
Positive Electrodes ◽  
Negative Electrodes ◽  
Polyaniline Nanotubes

Asymmetric supercapacitors (ASCs) with high energy density are assembled based on the pseudocapacitance of both electrodes, which use polyaniline (PANI) nanotubes as positive electrodes and MoO3 nanobelts as negative electrodes in a 1 M H2SO4 aqueous electrolyte.

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.

A High-Performance Free-Standing Zn Anode for Flexible Zinc-Ion Batteries

Nanoscale ◽  
2021 ◽  
Author(s):  
Chenxi Gao ◽  
Jiawei Wang ◽  
Yuan Huang ◽  
Zixuan Li ◽  
Jiyan Zhang ◽  
...  
Keyword(s):  
Energy Density ◽  
High Performance ◽  
Low Cost ◽  
High Energy ◽  
Zinc Ion ◽  
High Energy Density ◽  
Free Standing ◽  
Energy Device ◽  
Zn Anode ◽  
Significant Attention

Zinc-ion batteries (ZIBs) have attracted significant attention owing to their high safety, high energy density, and low cost. ZIBs have been studied as a potential energy device for portable and...

Novel low-cost, high-energy-density (>700 Wh kg−1) Li-rich organic cathodes for Li-ion batteries

2021 ◽  
Vol 415 ◽  
pp. 128509
Author(s):  
Qihang Yu ◽  
Wu Tang ◽  
Yang Hu ◽  
Jian Gao ◽  
Ming Wang ◽  
...  
Keyword(s):  
Energy Density ◽  
Low Cost ◽  
High Energy ◽  
High Energy Density ◽  
Li Ion Batteries ◽  
Li Ion

A high-voltage aqueous lithium ion capacitor with high energy density from an alkaline–neutral electrolyte

2019 ◽  
Vol 7 (8) ◽  
pp. 4110-4118 ◽  
Author(s):  
Chunyang Li ◽  
Wenzhuo Wu ◽  
Shuaishuai Zhang ◽  
Liang He ◽  
Yusong Zhu ◽  
...  
Keyword(s):  
Energy Density ◽  
High Voltage ◽  
Lithium Ion ◽  
High Energy ◽  
High Energy Density ◽  
Carbon Anode ◽  
Biomass Carbon ◽  
Proof Of Concept ◽  
Lithium Ion Capacitor ◽  
Neutral Electrolyte

A proof-of-concept lithium ion capacitor comprising LiMn2O4 nanorods as the cathode, a nitrogen-rich biomass carbon anode and a stable alkaline–neutral electrolyte was designed and fabricated.

scholarly journals High-Energy Density Asymmetric Supercapacitor Based on Electrospun Vanadium Pentoxide and Polyaniline Nanofibers in Aqueous Electrolyte

2012 ◽  
Vol 159 (9) ◽  
pp. A1481-A1488 ◽  
Author(s):  
Wai Fatt Mak ◽  
Grace Wee ◽  
Vanchiappan Aravindan ◽  
Nutan Gupta ◽  
Subodh G. Mhaisalkar ◽  
...  
Keyword(s):  
Energy Density ◽  
Vanadium Pentoxide ◽  
Aqueous Electrolyte ◽  
High Energy ◽  
High Energy Density ◽  
Asymmetric Supercapacitor ◽  
Polyaniline Nanofibers
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