scholarly journals Asymmetric supercapacitors with excellent rate performance by integrating Co(OH)F nanorods and layered Ti3C2Tx paper

RSC Advances ◽  
2019 ◽  
Vol 9 (53) ◽  
pp. 30957-30963 ◽  
Author(s):  
Si Chen ◽  
Xuejiao Zhou ◽  
Xinzhi Ma ◽  
Lu Li ◽  
Panpan Sun ◽  
...  
Keyword(s):  
Negative Electrode ◽  
Positive Electrode ◽  
Asymmetric Supercapacitor ◽  
Rate Performance ◽  
Ni Foam ◽  
Asymmetric Supercapacitors

Here we describe an aqueous asymmetric supercapacitor assembled using Co(OH)F nanorods on Ni foam (Co(OH)F@NF) as the positive electrode and layered Ti3C2Tx paper on Ni foam (Ti3C2Tx@NF) as the negative electrode.

Electrochemical performance of an asymmetric supercapacitor based on graphene and cobalt molybdate electrodes

RSC Advances ◽  
2015 ◽  
Vol 5 (21) ◽  
pp. 16319-16327 ◽  
Author(s):  
Ganesh Kumar Veerasubramani ◽  
Karthikeyan Krishnamoorthy ◽  
Sang Jae Kim
Keyword(s):  
Graphene Oxide ◽  
Electrochemical Performance ◽  
Reduced Graphene Oxide ◽  
Negative Electrode ◽  
Positive Electrode ◽  
Asymmetric Supercapacitor ◽  
Asymmetric Supercapacitors ◽  
Reduced Graphene ◽  
Cobalt Molybdate

In this article, we report the fabrication and electrochemical performance of asymmetric supercapacitors (ASCs) based on a reduced graphene oxide (rGO) negative electrode and a cobalt molybdate (CoMoO4) positive electrode.

scholarly journals Ultrathin MnO2 nanoflakes grown on N-doped carbon nanoboxes for high-energy asymmetric supercapacitors

2015 ◽  
Vol 3 (42) ◽  
pp. 21337-21342 ◽  
Author(s):  
Yihui Dai ◽  
Ling Chen ◽  
Vladimir Babayan ◽  
Qilin Cheng ◽  
Petr Saha ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Negative Electrode ◽  
High Energy ◽  
Positive Electrode ◽  
Asymmetric Supercapacitor ◽  
Asymmetric Supercapacitors

A green asymmetric supercapacitor has been assembled using MnO2/C hollow nanoboxes as a positive electrode and the corresponding N-doped carbon nanoboxes as a negative electrode, which exhibits an impressive electrochemical performance.

Three-dimensional Co3O4@C@Ni3S2 sandwich-structured nanoneedle arrays: towards high-performance flexible all-solid-state asymmetric supercapacitors

2015 ◽  
Vol 3 (31) ◽  
pp. 16150-16161 ◽  
Author(s):  
Dezhi Kong ◽  
Chuanwei Cheng ◽  
Ye Wang ◽  
Jen It Wong ◽  
Yaping Yang ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Solid State ◽  
High Performance ◽  
Three Dimensional ◽  
Negative Electrode ◽  
High Energy ◽  
High Energy Density ◽  
Asymmetric Supercapacitor ◽  
Cycle Stability ◽  
Asymmetric Supercapacitors

A novel asymmetric supercapacitor composed of Co3O4@C@Ni3S2 NNAs as the positive electrode and activated carbon (AC) as the negative electrode can deliver a high energy density and excellent long cycle stability.

scholarly journals High Performance Asymmetric Supercapacitor Based on Hierarchical Carbon Cloth In Situ Deposited with h-WO3 Nanobelts as Negative Electrode and Carbon Nanotubes as Positive Electrode

Micromachines ◽  
2021 ◽  
Vol 12 (10) ◽  
pp. 1195
Author(s):  
Jianhao Lin ◽  
Xusheng Du
Keyword(s):  
Carbon Nanotubes ◽  
High Performance ◽  
Hydrothermal Reaction ◽  
Synthesis Method ◽  
Negative Electrode ◽  
Current Collector ◽  
Cell System ◽  
Positive Electrode ◽  
Carbon Cloth ◽  
Asymmetric Supercapacitor

Urchin-like tungsten oxide (WO3) microspheres self-assembled with nanobelts are deposited on the surface of the hydrophilic carbon cloth (CC) current collector via hydrothermal reaction. The WO3 nanobelts in the urchin-like microspheres are in the hexagonal crystalline phase, and their widths are around 30–50 nm. The resulted hierarchical WO3 / CC electrode exhibits a capacitance of 3400 mF / cm2 in H2SO4 electrolyte in the voltage window of −0.5 ~ 0.2 V, which makes it an excellent negative electrode for asymmetric supercapacitors. To improve the capacitive performance of the positive electrode and make it comparable with that of the WO3 / CC electrode, both the electrode material and the electrolyte have been carefully designed and prepared. Therefore, the hydrophilic CC is further coated with carbon nanotubes (CNTs) to create a hierarchical CNT / CC electrode via a convenient flame synthesis method, and a redox-active electrolyte containing an Fe2+ / Fe 3+ couple is introduced into the half-cell system as well. As a result, the high performance of the asymmetric supercapacitor assembled with both the asymmetric electrodes and electrolytes has been realized. It exhibits remarkable energy density as large as 403 μW h / cm2 at 15 mW / cm2 and excellent cyclic stability after 10,000 cycles.

Asymmetric supercapacitors based on La-doped MoO3 nanobelts as advanced negative electrode and VOR nanosheets as positive electrode

2020 ◽  
Vol 56 (2) ◽  
pp. 1612-1629
Author(s):  
Zijun Shi ◽  
Juyin Liu ◽  
Yanfang Gao ◽  
Yu Xu
Keyword(s):  
Negative Electrode ◽  
Positive Electrode ◽  
Asymmetric Supercapacitors ◽  
La Doped

Rational design of uniformly embedded metal oxide nanoparticles into nitrogen-doped carbon aerogel for high-performance asymmetric supercapacitors with a high operating voltage window

2016 ◽  
Vol 4 (42) ◽  
pp. 16576-16587 ◽  
Author(s):  
Guanglin Sun ◽  
Hangyu Xie ◽  
Jiabing Ran ◽  
Liya Ma ◽  
Xinyu Shen ◽  
...  
Keyword(s):  
High Performance ◽  
Rational Design ◽  
Metal Oxide Nanoparticles ◽  
Negative Electrode ◽  
Carbon Aerogel ◽  
Operating Voltage ◽  
Asymmetric Supercapacitor ◽  
Asymmetric Supercapacitors ◽  
Nitrogen Doped ◽  
Nitrogen Doped Carbon

We report the design of a novel asymmetric supercapacitor (ASC) based on MnO/carbon aerogel (MnO/NCA) as the positive electrode and Fe2O3/carbon aerogel (Fe2O3/NCA) as the negative electrode.

In Situ Growth of FeCo-Selenide on Ni Foam as High-Performance Electrode for Electrochemical Energy Storage Devices

NANO ◽  
2018 ◽  
Vol 13 (07) ◽  
pp. 1850078 ◽  
Author(s):  
An Ye ◽  
Jiqiu Qi ◽  
Yanwei Sui ◽  
Fei Yang ◽  
Fuxiang Wei ◽  
...  
Keyword(s):  
Energy Storage ◽  
High Performance ◽  
Specific Capacity ◽  
Negative Electrode ◽  
Storage Device ◽  
Asymmetric Supercapacitor ◽  
Ni Foam ◽  
Energy Storage Devices ◽  
Practical Applications ◽  
Nanosheet Arrays

A solid-state energy storage device has been fabricated using FeCo-selenide nanosheet arrays as positive electrode and Fe2O3 nanorod as negative electrode. As an electrode material, the ternary FeCo-selenide nanosheet arrays supported by Ni foam show a highest specific capacitance of 978 F/g (specific capacity of 163[Formula: see text]mAh/g) at 1 A/g and a superior cycle behavior of 81.2% are obtained after 5000 cycles at current density of 4 A/g. The asymmetric supercapacitor achieves the maximum energy density of 34.6[Formula: see text]W[Formula: see text]h/kg at the power density of 759.6[Formula: see text]W/kg. Furthermore, the superior cycling stability with 83% retention of initial capacitance after 5000 cycles further verify the practical applications of FeCo-selenide//Fe2O3 asymmetric supercapacitor. Meanwhile, the LED bulb and the light board of “CUMT” are lighted by connecting several capacitors to form a series circuit.

In situ growth of NiCo2S4@Ni3V2O8 on Ni foam as a binder-free electrode for asymmetric supercapacitors

2016 ◽  
Vol 4 (15) ◽  
pp. 5669-5677 ◽  
Author(s):  
Lengyuan Niu ◽  
Yidan Wang ◽  
Fengping Ruan ◽  
Cheng Shen ◽  
Shen Shan ◽  
...  
Keyword(s):  
Energy Density ◽  
High Energy ◽  
High Energy Density ◽  
Asymmetric Supercapacitor ◽  
High Power Density ◽  
In Situ Growth ◽  
Ni Foam ◽  
Asymmetric Supercapacitors ◽  
Binder Free

A NiCo2S4@Ni3V2O8//AC asymmetric supercapacitor was successfully fabricated and it can deliver both high energy density and high power density.

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