Asymmetric supercapacitor based on VS2 nanosheets and activated carbon materials

RSC Advances ◽  
2016 ◽  
Vol 6 (45) ◽  
pp. 38990-39000 ◽  
Author(s):  
Tshifhiwa M. Masikhwa ◽  
Farshad Barzegar ◽  
Julien K. Dangbegnon ◽  
Abdulhakeem Bello ◽  
Moshawe J. Madito ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Energy Density ◽  
Carbon Materials ◽  
Maximum Energy ◽  
Asymmetric Supercapacitor ◽  
Negative Electrodes

Asymmetric supercapacitor with VS2 nanosheets as positive and activated carbon materials as negative electrodes exhibited maximum energy density (42 W h kg−1).

A high energy density asymmetric supercapacitor based on a CoNi-layered double hydroxide and activated carbon

Carbon ◽  
2016 ◽  
Vol 100 ◽  
pp. 710 ◽  
Author(s):  
Li-jing Xie ◽  
Guo-hua Sun ◽  
Long-fei Xie ◽  
Fang-yuan Su ◽  
Xiao-ming Li ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Energy Density ◽  
Layered Double Hydroxide ◽  
High Energy ◽  
High Energy Density ◽  
Asymmetric Supercapacitor ◽  
Double Hydroxide

Microporous Ni11(HPO3)8(OH)6 nanocrystals for high-performance flexible asymmetric all solid-state supercapacitors

2014 ◽  
Vol 43 (45) ◽  
pp. 17000-17005 ◽  
Author(s):  
Yanping Gao ◽  
Junhong Zhao ◽  
Zhen Run ◽  
Guangqin Zhang ◽  
Huan Pang
Keyword(s):  
Solid State ◽  
Energy Density ◽  
High Performance ◽  
High Stability ◽  
Maximum Energy ◽  
Asymmetric Supercapacitor

Microporous Ni11(HPO3)8(OH)6 nanocrystals were successfully applied to create a flexible solid-state asymmetric supercapacitor, which achieved a maximum energy density of 0.45 mW h cm−3 with high stability for 10 000 cycles.

NiS nanosheets synthesized by one-step microwave for high-performance supercapacitor

2021 ◽  
Author(s):  
Jun Song ◽  
Lijun Du ◽  
Jingyi Wang ◽  
Huaiping Zhang ◽  
Yaodong Zhang ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Energy Density ◽  
Electrochemical Performance ◽  
Power Density ◽  
Microwave Radiation ◽  
High Performance ◽  
Negative Electrode ◽  
Asymmetric Supercapacitor ◽  
Capacity Retention ◽  
One Step

The NiS nanosheets were fabricated using one-step microwave approach with the microwave radiation of 800 W for 1.5 min. Impressively, the NiS nanosheets revealed praiseworthy electrochemical performance, with a capacitance value of 1082.8 F ⋅ g[Formula: see text] at 1 A ⋅ g[Formula: see text] and 77.8% retention over 5000 cycles at 5 A ⋅ g[Formula: see text]. Moreover, an asymmetric supercapacitor was assembled with NiS as the positive electrode and activated carbon (AC) as the negative electrode. It shows 80.42% capacity retention after 8000 cycles and an energy density of 19.45 W ⋅ h ⋅ kg[Formula: see text] at a power density of 801.05 W ⋅ kg[Formula: see text].

A high energy density asymmetric supercapacitor based on a CoNi-layered double hydroxide and activated carbon

2016 ◽  
Vol 31 (1) ◽  
pp. 37-45 ◽  
Author(s):  
Li-jing Xie ◽  
Guo-hua Sun ◽  
Long-fei Xie ◽  
Fang-yuan Su ◽  
Xiao-ming Li ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Energy Density ◽  
Layered Double Hydroxide ◽  
High Energy ◽  
High Energy Density ◽  
Asymmetric Supercapacitor ◽  
Double Hydroxide

Asymmetric supercapacitor based on an α-MoO3 cathode and porous activated carbon anode materials

RSC Advances ◽  
2015 ◽  
Vol 5 (47) ◽  
pp. 37462-37468 ◽  
Author(s):  
F. Barzegar ◽  
A. Bello ◽  
D. Y. Momodu ◽  
J. K. Dangbegnon ◽  
F. Taghizadeh ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Anode Materials ◽  
Carbon Materials ◽  
Low Cost ◽  
Negative Electrode ◽  
Polymer Materials ◽  
Carbon Anode ◽  
Asymmetric Supercapacitor ◽  
Negative Electrode Material ◽  
Porous Activated Carbon

Low cost porous carbon materials were produced from cheap polymer materials and graphene foam materials which were tested as a negative electrode material in an asymmetric cell configuration with α-MoO3 as a positive electrode.

Influence of imidazolium-based ionic liquid electrolytes on the performance of nano-structured MnO2 hollow spheres as electrochemical supercapacitor

RSC Advances ◽  
2015 ◽  
Vol 5 (52) ◽  
pp. 41617-41626 ◽  
Author(s):  
Sandipan Maiti ◽  
Atin Pramanik ◽  
Sourindra Mahanty
Keyword(s):  
Ionic Liquid ◽  
Activated Carbon ◽  
Energy Density ◽  
Hollow Sphere ◽  
Hollow Spheres ◽  
Asymmetric Supercapacitor ◽  
Electrochemical Supercapacitor ◽  
Liquid Electrolytes

Activated carbon//MnO2 hollow sphere asymmetric supercapacitor shows an energy density of 163 W h kg−1 in EMIMBF4 ionic liquid as electrolyte.

A reduced graphene oxide modified metallic cobalt composite with superior electrochemical performance for supercapacitors

RSC Advances ◽  
2015 ◽  
Vol 5 (78) ◽  
pp. 63553-63560 ◽  
Author(s):  
Guijing Liu ◽  
Lei Wang ◽  
Bo Wang ◽  
Tiantian Gao ◽  
Dianlong Wang
Keyword(s):  
Graphene Oxide ◽  
Energy Density ◽  
Electrochemical Performance ◽  
Reduced Graphene Oxide ◽  
Power Density ◽  
Maximum Energy ◽  
Asymmetric Supercapacitor ◽  
Metallic Cobalt ◽  
Reduced Graphene

The prepared rGO/Co//AC asymmetric supercapacitor displayed good electrochemical performance, and it achieved a maximum energy density of 40.7 W h kg−1 at a power density of 1585.0 W kg−1.

scholarly journals 1.8 V Aqueous Symmetric Carbon-Based Supercapacitors with Agarose-Bound Activated Carbons in an Acidic Electrolyte

Nanomaterials ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1731
Author(s):  
Chih-Chung Lai ◽  
Feng-Hao Hsu ◽  
Su-Yang Hsu ◽  
Ming-Jay Deng ◽  
Kueih-Tzu Lu ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Sulfuric Acid ◽  
Energy Density ◽  
Activated Carbons ◽  
High Energy ◽  
Aqueous Electrolytes ◽  
Alternative Material ◽  
Aqueous Cells ◽  
Acidic Electrolyte ◽  
Cycling Behavior

The specific energy of an aqueous carbon supercapacitor is generally small, resulting mainly from a narrow potential window of aqueous electrolytes. Here, we introduced agarose, an ecologically compatible polymer, as a novel binder to fabricate an activated carbon supercapacitor, enabling a wider potential window attributed to a high overpotential of the hydrogen-evolution reaction (HER) of agarose-bound activated carbons in sulfuric acid. Assembled symmetric aqueous cells can be galvanostatically cycled up to 1.8 V, attaining an enhanced energy density of 13.5 W h/kg (9.5 µW h/cm2) at 450 W/kg (315 µW/cm2). Furthermore, a great cycling behavior was obtained, with a 94.2% retention of capacitance after 10,000 cycles at 2 A/g. This work might guide the design of an alternative material for high-energy aqueous supercapacitors.

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.

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