An asymmetric supercapacitor with an interpenetrating crystalline Fe-MOF as positive electrode and its congenetic derivative as negative electrode

2021 ◽  
Author(s):  
Saier Wang ◽  
Shuaishuai Wang ◽  
Xu Guo ◽  
Zikai Wang ◽  
Fei Fei Mao ◽  
...  
Keyword(s):  
Carboxylic Acid ◽  
Negative Electrode ◽  
Positive Electrode ◽  
Asymmetric Supercapacitor ◽  
Aromatic Carboxylic Acid

Herein, a novel Fe-based MOF Fe(TATB)(Tipa)(H2O (FeSC) with 3D interpenetrated topology has been successfully prepared through the reaction among a tribasic aromatic carboxylic acid 4,4',4''-(1,3,5-triazine-2,4,6-triyl)tribenzoic (H3TATB), Fe(SO4)2·7H2O, and a flexible...

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 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.

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.

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.

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.

Fabrication of hollow nanorod electrodes based on RuO2//Fe2O3 for an asymmetric supercapacitor

2018 ◽  
Vol 47 (23) ◽  
pp. 7747-7753 ◽  
Author(s):  
Qiufan Wang ◽  
Xiao Liang ◽  
Yun Ma ◽  
Daohong Zhang
Keyword(s):  
Energy Density ◽  
Power Density ◽  
High Power ◽  
Negative Electrode ◽  
High Energy ◽  
Positive Electrode ◽  
High Energy Density ◽  
Asymmetric Supercapacitor ◽  
High Power Density ◽  
High Capacitance

A novel type of asymmetric supercapacitor was fabricated by assembling a RuO2 positive electrode and a Fe2O3 negative electrode. Full cells are constructed and show a high capacitance of 4.9 F cm−3, a high energy density of 1.5 mW h cm−3 and a high power density of 9.1 mW cm−3.

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.

Polypyrrole and polypyrrole@MnO2 nanowires grown on graphene foam for asymmetric supercapacitor

2020 ◽  
Vol 10 (8) ◽  
pp. 1308-1316
Author(s):  
Shuang Dong ◽  
Zhengyun Wang ◽  
Junlei Wang ◽  
Yin Yao ◽  
Hongfang Liu
Keyword(s):  
Rational Design ◽  
Active Material ◽  
Negative Electrode ◽  
High Energy ◽  
Cycling Stability ◽  
Positive Electrode ◽  
High Energy Density ◽  
Asymmetric Supercapacitor ◽  
Graphene Foam ◽  
Polypyrrole Nanowires

The asymmetric supercapacitor with negative electrode by graphene foam loaded Polypyrrole nanowires (PPy NWs/rGOF) and positive electrode by PPy@MnO2 core–shell nanowires on graphene foam (PPy@MnO2 NWs/rGOF) was developed. The negative electrode was further converted into the positive electrode by one-step redox reaction at room temperature. Graphene foam (rGOF) with unique flexibility, large surface area and high electric conductivity can favor in situ growth of polypyrrole nanowires (PPy NWs) as well as improve cycling stability of the resultant negative electrode. PPy NWs served as the ideal template for the formation of MnO2 shell gives rise to the as-prepared positive electrode with fast electron transport and enhanced active material utilization. Owing to the rational design, the assembled asymmetric supercapacitor was able to be repeatedly discharged/charged at 1.6 V, displaying high energy density of 1.04 mWh cm–3 with improved cycling stability.

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