scholarly journals Reduced Graphene Oxide-sno2-Polyaniline Ternary Composite for High-Performance Supercapacitors

2021 ◽  
Vol 18 (2) ◽  
pp. 206-216
Author(s):  
Vimukthi Jayaweera ◽  
W.L.N.C. Liyanage ◽  
R.C.L. De Silva ◽  
S.R.D. Rosa ◽  
Iresha R. M. Kottegoda
Keyword(s):  
High Performance ◽  
High Current Density ◽  
Process Analysis ◽  
High Current ◽  
Supercapacitor Electrode ◽  
One Pot ◽  
Ternary Composite ◽  
Reduced Graphene ◽  
Symmetric Supercapacitor ◽  
Polyaniline Nanocomposite

A novel symmetric supercapacitor electrode material, rGO-SnO2-polyaniline nanocomposite,was synthesized using graphite oxide, SnCl2.2H2O, and pure Aniline as precursors in a scalable and straightforward one-pot process. Analysis revealed that the rGO-SnO2-polyaniline composite had been successfully synthesized. When the two-electrode supercapacitor was assembled using 1M H2SO4, it showed an outstanding specific gravimetric capacitance of 524.2 F/g at a 5 mV/s scan rate. To the best of our knowledge, such a higher value for a two-electrode specific capacitance for a supercapacitor was never reported.Furthermore, even at a high current density of 1 A/g, the material disclosed an outstanding charge-discharge characteristic. Thus, the rGO-SnO2-polyaniline nanocomposite couldalso be used as an electrode for commercial supercapacitors.

scholarly journals Hierarchical Porous Carbon Derived from Sichuan Pepper for High-Performance Symmetric Supercapacitor with Decent Rate Capability and Cycling Stability

Nanomaterials ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 553 ◽  
Author(s):  
Hengshuo Zhang ◽  
Wei Xiao ◽  
Wenjie Zhou ◽  
Shanyong Chen ◽  
Yanhua Zhang
Keyword(s):  
Specific Capacitance ◽  
Current Density ◽  
High Performance ◽  
High Current Density ◽  
Rate Capability ◽  
Cycling Stability ◽  
Koh Activation ◽  
High Current ◽  
Symmetric Supercapacitor ◽  
Hierarchical Porous

Hierarchical micro-mesoporous carbon (denoted as HPC-2 in this study) was synthesized by pre-carbonization of biomass Sichuan pepper followed by KOH activation. It possessed well-developed porosity with the specific surface area of 1823.1 m2 g−1 and pore volume of 0.906 cm3 g−1, and exhibited impressive supercapacitive behaviors. For example, the largest specific capacitance of HPC-2 was tested to be ca. 171 F g−1 in a three-electrode setup with outstanding rate capability and stable electrochemical property, whose capacitance retention was near 100% after cycling at rather a high current density of 40 A g−1 for up to 10,000 cycles. Furthermore, a two-electrode symmetric supercapacitor cell of HPC-2//HPC-2 was constructed, which delivered the maximum specific capacitance and energy density of ca. 30 F g−1 and 4.2 Wh kg−1, respectively, had prominent rate performance and cycling stability with negligible capacitance decay after repetitive charge/discharge at a high current density of 10 A g−1 for over 10,000 cycles. Such electrochemical properties of HPC-2 in both three- and two-electrode systems are superior or comparable to those of a great number of porous biomass carbon reported previously, hence making it a promising candidate for the development of high-performance energy storage devices.

Porous CuCo2O4 nanocubes wrapped by reduced graphene oxide as high-performance lithium-ion battery anodes

Nanoscale ◽  
2014 ◽  
Vol 6 (12) ◽  
pp. 6551-6556 ◽  
Author(s):  
Wenpei Kang ◽  
Yongbing Tang ◽  
Wenyue Li ◽  
Zhangpeng Li ◽  
Xia Yang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Lithium Ion Battery ◽  
Reduced Graphene Oxide ◽  
Current Density ◽  
High Performance ◽  
High Current Density ◽  
Lithium Ion ◽  
High Current ◽  
Reduced Graphene ◽  
Graphene Oxide Sheets

Porous CuCo2O4 nanocubes well wrapped by reduced graphene oxide sheets were facilely prepared and they showed impressive performance at high current density as the anode material of a lithium ion battery.

Hydrothermally synthesized BiVO4–reduced graphene oxide nanocomposite as a high performance supercapacitor electrode with excellent cycle stability

2018 ◽  
Vol 42 (12) ◽  
pp. 10161-10166 ◽  
Author(s):  
Shibsankar Dutta ◽  
Shreyasi Pal ◽  
Sukanta De
Keyword(s):  
Graphene Oxide ◽  
Synergistic Effect ◽  
Electrochemical Performance ◽  
High Performance ◽  
Hydrothermal Process ◽  
Cycle Stability ◽  
Supercapacitor Electrode ◽  
Reduced Graphene ◽  
Symmetric Supercapacitor ◽  
One Step

A BiVO4/rGO hybrid-based symmetric supercapacitor has been fabricated via a simple one-step hydrothermal process, which shows a synergistic effect towards electrochemical performance with excellent cycle stability.

Hydrothermal Synthesis of Porous Graphene Nanosheets for Supercapacitors

2015 ◽  
Vol 719-720 ◽  
pp. 119-122
Author(s):  
Zi Long Liu ◽  
Fu Jun Xia ◽  
Qing Zhong Xue ◽  
Yong Gang Du ◽  
Qi Kai Guo
Keyword(s):  
High Current Density ◽  
Graphene Nanosheets ◽  
Low Cost ◽  
Pristine Graphene ◽  
High Current ◽  
Supercapacitor Electrode ◽  
Porous Graphene ◽  
Transmission Electron ◽  
Reduced Graphene ◽  
Novel Strategy

Porous graphene has been easily synthesized by hydrothermal treating reduced graphene oxide in alkaline solution, and the porous structure was confirmed by transmission electron microscope. When used as supercapacitor electrode, porous graphene holds a specific capacitance of 88 F g-1 at an ultra-high current density of 50 A g-1, an increase of about 83% compared with that for the pristine graphene sheets. The results demonstrate that porous graphene opens a new and short way for ion transportation. Furthermore our findings provide a novel strategy to fabricate porous graphene and the process is simple, low-cost and environmentally friendly.

scholarly journals Highly interdigitated and porous architected ternary composite of SnS2, g-C3N4, and reduced graphene oxide (rGO) as high performance lithium ion battery anodes

RSC Advances ◽  
2017 ◽  
Vol 7 (6) ◽  
pp. 3125-3135 ◽  
Author(s):  
Md. Selim Arif Sher Shah ◽  
A. Reum Park ◽  
Ali Rauf ◽  
Sung Hwan Hong ◽  
Youngjin Choi ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Electrochemical Properties ◽  
Lithium Ion Battery ◽  
Reduced Graphene Oxide ◽  
High Performance ◽  
Lithium Ion ◽  
Hydrothermal Route ◽  
One Pot ◽  
Ternary Composite ◽  
Reduced Graphene

Highly interdigitated and porous architected ternary composites of SnS2, rGO and g-C3N4 synthesized via one-pot hydrothermal route showed excellent electrochemical properties.

Study of Electrochemical Properties of NiCo2O4/ Reduced Graphene Oxide / PEDOT:PSS Ternary Nanocomposite for High Performance Supercapacitor Electrode

2021 ◽  
Vol 19 (8) ◽  
pp. 77-83
Author(s):  
Baraa Abd Alreda ◽  
Shaymaa Hadi Al-Rubaye
Keyword(s):  
High Performance ◽  
Electrode Materials ◽  
Supercapacitor Electrode ◽  
Super Capacitor ◽  
Ternary Composite ◽  
Electrochemical Testing ◽  
Step Procedure ◽  
Reduced Graphene ◽  
Poly Styrene Sulfonate ◽  
A Current

A two-step procedure is used to create a novel ternary composite NiCo2O4 hexagonalnanoplatesarray/ reducedgrapheneoxide/poly(3,4ethylenedioxythiophene): poly (styrene-sulfonate) (NiCo2O4-rGO/PEDOT:PSS). It was tested to see if it might be used in super capacitor electrode materials. According to electrochemical testing, the NiCo2O4-rGO-PEDOT. PSS materials has a great exact capacitance of 1115 Fg.1 on a current compactness of 2 Ag-1, decent rate ability, and excellent cycle stability, with capacitance retention of 88 percent after 10000 cycles. As a consequence, this ternary composite may find use in a variety of energy storage electrodes.

scholarly journals One-Pot Synthesis of W2C/WS2 Hybrid Nanostructures for Improved Hydrogen Evolution Reactions and Supercapacitors

Nanomaterials ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 1597 ◽  
Author(s):  
Sajjad Hussain ◽  
Iqra Rabani ◽  
Dhanasekaran Vikraman ◽  
Asad Feroze ◽  
Muhammad Ali ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
High Performance ◽  
Hybrid Nanostructures ◽  
Alkaline Media ◽  
Supercapacitor Electrode ◽  
One Pot ◽  
Energy Applications ◽  
Symmetric Supercapacitor ◽  
Acidic And Alkaline Media ◽  
First Time

Tungsten sulfide (WS2) and tungsten carbide (W2C) are materialized as the auspicious candidates for various electrochemical applications, owing to their plentiful active edge sites and better conductivity. In this work, the integration of W2C and WS2 was performed by using a simple chemical reaction to form W2C/WS2 hybrid as a proficient electrode for hydrogen evolution and supercapacitors. For the first time, a W2C/WS2 hybrid was engaged as a supercapacitor electrode and explored an incredible specific capacitance of ~1018 F g−1 at 1 A g−1 with the outstanding robustness. Furthermore, the constructed symmetric supercapacitor using W2C/WS2 possessed an energy density of 45.5 Wh kg−1 at 0.5 kW kg−1 power density. For hydrogen evolution, the W2C/WS2 hybrid produced the low overpotentials of 133 and 105 mV at 10 mA cm−2 with the small Tafel slopes of 70 and 84 mV dec−1 in acidic and alkaline media, respectively, proving their outstanding interfaced electrocatalytic characteristics. The engineered W2C/WS2-based electrode offered the high-performance for electrochemical energy applications.

Template-free single pot synthesis of SnS2@Cu2O/reduced graphene oxide (rGO) nanoflowers for high performance supercapacitors

2017 ◽  
Vol 41 (7) ◽  
pp. 2702-2716 ◽  
Author(s):  
Goutam Hatui ◽  
Ganesh Chandra Nayak ◽  
G. Udayabhanu ◽  
Yogendra Kumar Mishra ◽  
Devendra Deo Pathak
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
High Performance ◽  
Electrode Materials ◽  
Hydrothermal Route ◽  
Supercapacitor Electrode ◽  
One Pot ◽  
Reduced Graphene ◽  
Template Free ◽  
Supercapacitor Electrode Materials

A template-free one-pot hydrothermal route was adopted for the facile synthesis of SnS2@Cu2O/reduced graphene oxide (rGO) nanoflowers for supercapacitor electrode materials.

One-step Synthesis of Amorphous Nickel Iron Phosphide Hierarchical Nanostructures for Water Electrolysis with Superb Stability at High Current Density

2021 ◽  
Author(s):  
Yuefeng Yu ◽  
Xun He ◽  
Rong Li ◽  
Xinglong Gou
Keyword(s):  
High Performance ◽  
High Current Density ◽  
Water Electrolysis ◽  
Bifunctional Catalysts ◽  
High Current ◽  
Hierarchical Nanostructures ◽  
Iron Phosphide ◽  
Nickel Iron ◽  
Metal Free ◽  
One Step

Development of noble-metal-free high-performance bifunctional catalysts for both oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) is essential but challenging for hydrogen production from water electrolysis. Herein, amorphous bimetallic...

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