Synthesis of mesoporous NiCo2O4–rGO by a solvothermal method for charge storage applications

RSC Advances ◽  
2015 ◽  
Vol 5 (82) ◽  
pp. 66657-66666 ◽  
Author(s):  
Ediga Umeshbabu ◽  
G. Rajeshkhanna ◽  
Ponniah Justin ◽  
G. Ranga Rao
Keyword(s):  
Electrode Material ◽  
Solvothermal Method ◽  
Cost Effective ◽  
Polymeric Surfactant ◽  
Charge Storage ◽  
Supercapacitor Application ◽  
Mesoporous Nico2o4

A facile and cost-effective solvothermal method is described for the synthesis of mesoporous NiCo2O4–rGO electrode material using PVP polymeric surfactant for supercapacitor application.

Microwave assisted synthesis of mesoporous NiCo2O4 nanosheets as electrode material for advanced flexible supercapacitors

RSC Advances ◽  
2015 ◽  
Vol 5 (42) ◽  
pp. 33146-33154 ◽  
Author(s):  
Syed Khalid ◽  
Chuanbao Cao ◽  
Aziz Ahmad ◽  
Lin Wang ◽  
M. Tanveer ◽  
...  
Keyword(s):  
Electrode Material ◽  
Environmentally Friendly ◽  
Cost Effective ◽  
Microwave Assisted Synthesis ◽  
Calcination Process ◽  
Heating Method ◽  
Microwave Assisted ◽  
Nickel Cobaltite ◽  
Nico2o4 Nanosheets ◽  
Mesoporous Nico2o4

Mesoporous nickel cobaltite (NiCo2O4) nanosheets are synthesized using a cost effective, ultra fast and environmentally friendly microwave assisted heating method followed by a post-calcination process of the as-prepared precursors.

Fabrication and charge storage capacitance of PPY/TiO2/PPY jacket nanotube array

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Yibing Xie
Keyword(s):  
Density Of States ◽  
Electrode Material ◽  
Acidic Solution ◽  
Tube Wall ◽  
Internal Surface ◽  
Experimental Result ◽  
Charge Storage ◽  
Current Response ◽  
Supercapacitor Electrode ◽  
Nanotube Array

AbstractA PPY/TiO2/PPY jacket nanotube array was fabricated by coating PPY layer on the external and internal surface of a tube wall-separated TiO2 nanotube array. It shows coaxial triple-walled nanotube structure with two PPY nanotube layers sandwiching one TiO2 nanotube layer. PPY/TiO2/PPY reveals much higher current response than TiO2. The theoretical calculation indicates PPY/TiO2/PPY reveals higher density of states and lower band gap, accordingly presenting higher conductivity and electroactivity, which is consistent with the experimental result of a higher current response. The electroactivity is highly enhanced in H2SO4 rather than Na2SO4 electrolyte due to feasible pronation process of PPY in an acidic solution. PPY/TiO2/PPY could conduct the redox reaction in H2SO4 electrolyte which involves the reversible protonation/deprotonation and HSO4− doping/dedoping process and accordingly contributes to Faradaic pseudocapacitance. The specific capacitance is highly enhanced from 1.7 mF cm−2 of TiO2 to 123.4 mF cm−2 of PPY/TiO2/PPY at 0.1 mA cm−2 in H2SO4 electrolyte. The capacitance also declines from 123.4 to 31.7 mF cm−2 when the current density increases from 0.1 to 1 mA cm−2, presenting the rate capacitance retention of 26.7% due to the semiconductivity of TiO2. A PPY/TiO2/PPY jacket nanotube with high charge storage capacitance is regarded as a promising supercapacitor electrode material.

Fe, Ni-codoped W18O49 grown on nickel foam as bifunctional electrocatalyst for boosted water splitting

2021 ◽  
Author(s):  
Guojuan Hai ◽  
Jianfeng Huang ◽  
Liyun Cao ◽  
Koji Kajiyoshi ◽  
Long Wang ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Water Splitting ◽  
High Performance ◽  
Solvothermal Method ◽  
Nickel Foam ◽  
Energy Systems ◽  
Cost Effective ◽  
Bifunctional Catalysts ◽  
Renewable Energy Systems ◽  
Bifunctional Electrocatalyst

Designing cost-effective bifunctional catalysts with high-performance and durability is of great significance for the renewable energy systems. Herein, a typical Fe, Ni-codoped W18O49/NF was prepared via a simple solvothermal method....

Silver mirror reaction metallized chromatography paper for supercapacitor application

2021 ◽  
Author(s):  
I-Hsuan Chen ◽  
Jung-Hsien Chang ◽  
Ren-Jie Xie ◽  
Chia-Hui Tseng ◽  
Sheng-Rong Hsieh ◽  
...  
Keyword(s):  
Flexible Electronics ◽  
Photoelectron Spectroscopy ◽  
Cost Effective ◽  
Water Contact ◽  
X Ray ◽  
Supercapacitor Application ◽  
Resource Limited ◽  
Vis Spectroscopy ◽  
Silver Mirror ◽  
Silver Mirror Reaction

Abstract In this study, the easy-to-operate silver mirror reaction (SMR) was used for metallizing chromatography paper. The SMR-metallized paper was characterized by water contact angle measurements, a surface profiler, X-ray photoelectron spectroscopy, UV-vis spectroscopy, X-ray diffraction, and electrical resistance measurement. The characterization results show that Ag was successfully synthesized on cellulose fibers and was electrically conductive after cyclic bending. Moreover, this SMR-metallized paper was used as electrodes for fabricating a supercapacitor. This SMR-metallized paper could be used for realizing cost-effective flexible electronics applied in on-site biochemical sensing in resource-limited settings.

Layered Polyaniline–Manganese Oxide Nanocomposite Electrode Material for Supercapacitor Application

2021 ◽  
Vol 400 (1) ◽  
pp. 2100179
Author(s):  
Snehal L. Kadam ◽  
Rahul S. Ingole ◽  
Nidhi Tiwari ◽  
Shrinivas Kulkarni
Keyword(s):  
Manganese Oxide ◽  
Electrode Material ◽  
Supercapacitor Application

Ultrathin Nanosheets-Assembled Nickel-Based Metal-Organic Framework Microflowers for Supercapacitor Application

2022 ◽  
Author(s):  
Chong-Huan Wang ◽  
Da-Wei Zhang ◽  
Shude Liu ◽  
Yusuke Yamauchi ◽  
Fei-Bao Zhang ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Specific Capacitance ◽  
Electrode Material ◽  
Metal Organic Framework ◽  
Rate Capability ◽  
High Specific Capacitance ◽  
Supercapacitor Application ◽  
Ultrathin Nanosheets ◽  
Metal Organic ◽  
Organic Framework

Herein, we propose a solvent-assisted approach for preparing Ni-MOF microflowers with high specific capacitance and excellent rate capability as an electrode material for supercapacitors. Such high electrochemical performance is attributed...

Sign in / Sign up

Export Citation Format

Share Document