scholarly journals An asymmetric supercapacitor based on controllable WO3 nanorod bundle and alfalfa-derived porous carbon

RSC Advances ◽  
2021 ◽  
Vol 11 (59) ◽  
pp. 37631-37642
Author(s):  
Kanjun Sun ◽  
Fengting Hua ◽  
Shuzhen Cui ◽  
Yanrong Zhu ◽  
Hui Peng ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Porous Carbon ◽  
Aqueous Electrolyte ◽  
Negative Electrode ◽  
Positive Electrode ◽  
Asymmetric Supercapacitor ◽  
Wo3 Nanorod ◽  
Porous Activated Carbon ◽  
Nanorod Bundle

A asymmetric supercapacitor is assembled on the basis of an inerratic hexagonal-like WO3 nanorod bundle as a negative electrode and graphene-like alfalfa-derived porous activated carbon as the positive electrode in 1 M H2SO4 aqueous electrolyte.

A high-performance asymmetric supercapacitor designed with a three-dimensional interconnected porous carbon framework and sphere-like nickel nitride nanosheets

2019 ◽  
Vol 43 (32) ◽  
pp. 12623-12629 ◽  
Author(s):  
Hui Peng ◽  
Xiuwen Dai ◽  
Kanjun Sun ◽  
Xuan Xie ◽  
Fei Wang ◽  
...  
Keyword(s):  
Porous Carbon ◽  
High Performance ◽  
Aqueous Electrolyte ◽  
Three Dimensional ◽  
Negative Electrode ◽  
Positive Electrode ◽  
Asymmetric Supercapacitor ◽  
The Novel ◽  
Carbon Framework ◽  
Nickel Nitride

The novel asymmetric supercapacitor was assembled based on a three-dimensional (3D) interconnected porous carbon framework as the negative electrode and 3D sphere-like nickel nitride nanosheets as the positive electrode in aqueous electrolyte.

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.

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 Synthesis and properties of zeolite/N-doped porous carbon for the efficient removal of chemical oxygen demand and ammonia-nitrogen from aqueous solution

RSC Advances ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 6452-6459 ◽  
Author(s):  
Guangzhi Xin ◽  
Min Wang ◽  
Lin Chen ◽  
Yuzhou Zhang ◽  
Meicheng Wang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Chemical Oxygen Demand ◽  
Porous Carbon ◽  
Mesoporous Carbon ◽  
Oxygen Demand ◽  
Ammonia Nitrogen ◽  
Efficient Removal ◽  
Porous Activated Carbon

A novel adsorbent zeolite/N-doped porous activated carbon (ZAC) was prepared by the synthesis of zeolite and mesoporous carbon to remove ammonia nitrogen (NH4+–N) and chemical oxygen demand (COD) from aqueous solution.

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.

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.

scholarly journals Impact of Moisture Sorbed from Air by Activated Carbon Electrodes on their Capacitance in Aqueous Electrolyte of Supercapacitor

2015 ◽  
Vol 16 (3) ◽  
pp. 547-550
Author(s):  
D.G. Gromadskyi
Keyword(s):  
Cyclic Voltammetry ◽  
Activated Carbon ◽  
Impedance Spectroscopy ◽  
Specific Capacitance ◽  
Porous Carbon ◽  
Aqueous Electrolyte ◽  
Carbon Electrodes ◽  
Vacuum Drying ◽  
Porous Carbon Electrodes

Impact of moisture sorbed from air by porous carbon electrodes after vacuum drying on their specific capacitance in aqueous 1.0 M Na2SO4 solution was studied. It was shown by cyclic voltammetry and impedance spectroscopy that electrodes lose more than 20 % of the capacitance after such drying procedure and in order to recover it takes about 1 month.

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].

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