Facile Synthesis Mn2O3 Nanorod Arrays: A Significant Material for Supercapacitor Electrode Application

Cyclic Voltammetric ◽

Scan Rate ◽

Abstract Mn2O3 is a significant candidate for various applications. In the present work, the Mn2O3 nanorod arrays have been successfully prepared through facile sonochemical method with the aid of cetyl trimethyl ammonium bromide (CTAB) template. The crystalline phase and bonding properties have ben confirmed through X-ray diffraction analysis (XRD) and Fourier transform infrared (FTIR) spectroscopic analysis. The electrochemical properties were analysed through various techniques such as cyclic voltammetric and galvanostatic charge/discharge analysis. Interestingly, cyclic voltammetric (CV) curves confirms the electric double layer capacitor-based charge storage mechanism and it render the maximum specific capacitance of 647 Fg-1 at a scan rate 5 mVs-1 whereas the galvanostatic charge/discharge studies offer the specific capacitance of 656 Fg-1 at a current density of 1 Ag-1. The Mn2O3 nanorod arrays provide the maximum energy and power densities of 91.1 Wh Kg-1 and 14985 Wkg-1 respectively. In addition, the cyclic stability analysis exhibit only 12 % initial capacitance degradation over 3000 CV cycles at a scan rate of 100 mVs-1. The hopeful outcomes demonstrate the significant of the Mn2O3 nanorod arrays as electrode material for supercapacitor devices.

Electrodeposition of PANI/MnO2 Composite on SnO2/Ti Substrate for Supercapacitor Electrode

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.239-242.1372 ◽

2011 ◽

Vol 239-242 ◽

pp. 1372-1375 ◽

Cited By ~ 3

Author(s):

Ya Kun Zhang ◽

Jian Ling Li ◽

Fei Gao ◽

Xin Dong Wang

Keyword(s):

Cyclic Voltammetry ◽

Synergistic Effect ◽

Specific Capacitance ◽

Current Density ◽

Galvanostatic Charge ◽

Electrochemical Tests ◽

A Current ◽

A layer of MnO2 was loaded between the SnO2/Ti substrate and the layer of PANI via a potentiodynamic electrodeposition. Electrochemical tests such as cyclic voltammetry and galvanostatic charge/discharge were applied to investigate the performance of the electrodes. The morphologies of the electrodes were also observed to identify the effect of the MnO2 layer. The specific capacitance of PANI with MnO2 reached to 601.48 F g-1 at a current density of 0.1 mA cm-2, which is 1.69 times as that of PANI electrodes without MnO2 layer. This gratifying result may due to the synergistic effect between MnO2 layer and PANI.

Preparation and Electrochemical Properties of LaMnO3 Powder as a Supercapacitor Electrode Material

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.727.698 ◽

2017 ◽

Vol 727 ◽

pp. 698-704 ◽

Cited By ~ 3

Author(s):

Xian Wei Wang ◽

Xiao Er Wang ◽

Hui Chao Zhang ◽

Qian Qian Zhu ◽

Dong Li Zheng ◽

...

Keyword(s):

Cyclic Voltammetry ◽

Electrode Material ◽

Raw Materials ◽

Sol Gel ◽

Galvanostatic Charge ◽

Lanthanum Manganate ◽

Pure Phase ◽

The structural and electrochemical properties of lanthanum manganate (LaMnO3) powder prepared by the sol-gel method are researched in this article. The powder calcined at 600 °C showed amorphous, and the powder calcined at 700-800 °C showed the pure phase of the LaMnO3. The grains with the size of about 80-120 nm were agglomerating together. Cyclic voltammetry and galvanostatic charge-discharge were used to characterize the electrochemical properties in alkaline environment. The electrochemical properties calcined at 700 °C showed a specific capacitance of 73 F/g at the current density of 0.5 A/g. The raw materials for preparing the LaMnO3 powder are cheap, and the operation method is simple.

Graphene-NiO Composite Electrode for Supercapacitors

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.345.75 ◽

2011 ◽

Vol 345 ◽

pp. 75-78 ◽

Cited By ~ 1

Author(s):

Wei Zhou ◽

Man Lin Tan ◽

Xiao Song Zhou

Keyword(s):

Cyclic Voltammetry ◽

Electrochemical Impedance Spectroscopy ◽

Impedance Spectroscopy ◽

Specific Capacitance ◽

Composite Electrode ◽

Electrochemical Impedance ◽

Graphene Sheets ◽

Scan Rate

In this paper, a facilesolution method was employed to synthesize the graphene-NiO composite. SEM and XRD results indicated the graphene sheets were covered by the NiO nanoplates. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) were used to measure the electrochemical properties of the composite. The specific capacitance reached 1292F/g at a scan rate of 5mV/s. The results show that this composite is a promising material for supercapacitor electrode.

Surface modification and electrochemical properties of activated carbons for supercapacitor electrodes

Modern Physics Letters B ◽

10.1142/s0217984915502541 ◽

2015 ◽

Vol 29 (Supplement 1) ◽

pp. 1550254 ◽

Cited By ~ 1

Author(s):

Dan Yang ◽

Wenmei Qiu ◽

Jingcai Xu ◽

Yanbing Han ◽

Hongxiao Jin ◽

...

Keyword(s):

Specific Capacitance ◽

Activated Carbons ◽

Chemical Properties ◽

Bet Surface Area ◽

Surface Chemical ◽

X Ray Diffraction ◽

Galvanostatic Charge ◽

X Ray ◽

Modifications with different acids (HNO3, H2SO4, HCl and HF, respectively) were introduced to treat the activated carbons (ACs) surface. The microstructures and surface chemical properties were discussed by X-ray diffraction (XRD), thermogravimetric analysis (TGA), ASAP, Raman spectra and Fourier transform infrared (FTIR) spectra. The ACs electrode-based supercapacitors were assembled with 6 mol ⋅ L[Formula: see text] KOH electrolyte. The electrochemical properties were studied by galvanostatic charge–discharge and cyclic voltammetry. The results indicated that although the BET surface area of modified ACs decreased, the functional groups were introduced and the ash contents were reduced on the surface of ACs, receiving larger specific capacitance to initial AC. The specific capacitance of ACs modified with HCl, H2SO4, HF and HNO3 increased by 31.4%, 23%, 21% and 11.6%, respectively.

Synthesis of BCN Nanoparticles Sandwiched between Carbon Nanosheets and Performance in Electrochemical Capacitors

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.719-720.137 ◽

2015 ◽

Vol 719-720 ◽

pp. 137-140

Author(s):

Ren Li Yang ◽

Jun Shuang Zhou ◽

Li Hou ◽

Yu Feng Zhao ◽

Fa Ming Gao

Keyword(s):

Cyclic Voltammetry ◽

Specific Capacitance ◽

Current Density ◽

Nitrogen Atmosphere ◽

Galvanostatic Charge ◽

Carbon Nanosheets ◽

And Performance ◽

Discharge Measurements ◽

BCN nanoparticles sandwiched between carbon nanosheets were synthesized with the P123 and borate ammonium under nitrogen atmosphere. The samples were characterized by SEM, TEM, and EELS. The SEM and TEM images show BCN nanoparticles are attached on the carbon nanosheets. Cyclic voltammetry (CV) and galvanostatic charge-discharge measurements are used to evaluate electrochemical properties of the composites. The samples show the specific capacitance of 102 F/g at current density of 200mA/g and good durability.

Precise control of morphology of ultrafine LiMn2O4 nanorods as a supercapacitor electrode via a two-step hydrothermal method

CrystEngComm ◽

10.1039/c8ce01029c ◽

2018 ◽

Vol 20 (38) ◽

pp. 5707-5717 ◽

Cited By ~ 10

Author(s):

Niraj Kumar ◽

K. Guru Prasad ◽

T. Maiyalagan ◽

Arijit Sen

Keyword(s):

Hydrothermal Method ◽

Galvanostatic Charge ◽

Precise Control ◽

Ultrafine 1D LiMn2O4 and its promising galvanostatic charge/discharge profiles in KOH/K3Fe(CN)6 electrolyte.

Effect of Ultrasonic Disperse on the Properties of Carbon Nanotubes Supercapacitors

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.148-149.1417 ◽

2010 ◽

Vol 148-149 ◽

pp. 1417-1420 ◽

Cited By ~ 1

Author(s):

Xin Sheng Yuan ◽

Hai Yan Zhang ◽

Yi Ming Chen

Keyword(s):

Carbon Nanotubes ◽

Specific Capacitance ◽

Vapor Deposition ◽

Chemical Vapor ◽

Constant Current ◽

Ultrasonic Dispersion ◽

Constant Current Charge ◽

Lani5 Alloy ◽

Carbon nanotubes (CNTs) of different diameter were synthesized by chemical vapor deposition using LaNi5 alloy of micrometer magnitude as catalyst. High-power ultrasonic grinder was employed to disperse CNTs for various time. CNTs with different dispersion levels were obtained and their impacts on the performance of CNTs supercapacitor electrode were researched as well. Constant current charge-discharge, Cycle Votammetry was employed to study the supercapacitors properties of carbon nanotubes. And the results showed that the specific capacitance of CNTs electrode without ultrasonic was 95.88F/g. However CNTs electrode has preferable electrochemistry properties with 16 hours ultrasonic dispersion, CNTs diameter about 30-50nm and well dispersibility: the specific capacitance had enhanced 69.9%, as high as 162.88F/g.

Capacitive behavior of functionalized activated carbon-based all-solid-state supercapacitor

Carbon letters ◽

10.1007/s42823-020-00219-w ◽

2021 ◽

Author(s):

Kyu Seok Lee ◽

Ye Ji Seo ◽

Hyeon Taek Jeong

Keyword(s):

Cyclic Voltammetry ◽

Activated Carbon ◽

Solid State ◽

Specific Capacitance ◽

Electrochemical Impedance ◽

Electrochemical Performances ◽

Galvanostatic Charge ◽

Capacitive Behavior ◽

Charge Discharge ◽

Discharge Curves

AbstractIn this report, we incorporate activated carbon (AC) onto aluminum substrate via doctor blade method to produce an all-solid-state supercapacitor. The electrochemical properties of the all-solid-state supercapacitor were characterized by cyclic voltammetry and electrochemical impedance spectroscopy. Galvanostatic charge/discharge tests also were carried out to exhibit stability of the AC-based supercapacitor. The impedance and charge/discharge curves of the all-solid-state supercapacitor showed good capacitive behavior after functionalized AC. The highest specific capacitance obtained for the AC-based supercapacitor was 106 F g−1. About 160% of specific capacitance increased after functionalization of the AC, which indicated that modification of the AC by nitric acid was able to introduce functional groups on the AC and improve its electrochemical performances.

Preparation and Electrochemical Properties of VO2(B) Nano-Belts

Materials Science Forum ◽

10.4028/www.scientific.net/msf.694.91 ◽

2011 ◽

Vol 694 ◽

pp. 91-97

Author(s):

Yu Long Qiao ◽

Yong Jun Ma ◽

Qing Ping Luo ◽

Chong Hua Pei

Keyword(s):

Cyclic Voltammetry ◽

Energy Loss ◽

Specific Capacitance ◽

Hydrothermal Method ◽

Monoclinic Phase ◽

Galvanostatic Charge ◽

Crystal Direction ◽

Electron Energy Loss ◽

The VO2(B) nanobelts with monoclinic phase were synthesized by a hydrothermal method at 220°C for 48 h in the absence of any surfactants. The electron energy loss spectrum (EELS) demonstrates that vanadium exists only in the 4+ oxidation state. The SEM and TEM images reveal a belt-like structure of the VO2(B) with the length of several micrometers, the width of 140 nm and the thickness of around 20nm and growth along the [110] crystal direction. Cyclic voltammetry (CV) and galvanostatic charge/discharge demonstrate that VO2(B) nano-belts electrode exhibits desirable electrochemical properties and the specific capacitance reaches up to 632.6F•g-1.

ELECTROCHEMICAL PROPERTIES OF POLY SODIUM 4-STYRENESULFONATE INTERCALATED GRAPHITE OXIDE ELECTRODE IN AN AQUEOUS ELECTROLYTE

NANO ◽

10.1142/s1793292012500531 ◽

2012 ◽

Vol 07 (06) ◽

pp. 1250053 ◽

Cited By ~ 2

Author(s):

CHEOL-SOO YANG ◽

JEONG-O LEE ◽

HAE KYUNG JEONG

Keyword(s):

Specific Capacitance ◽

Graphite Oxide ◽

Aqueous Electrolyte ◽

Cyclic Stability ◽

Oxide Electrode ◽

Galvanostatic Charge ◽

Intercalated Graphite ◽

Scan Rate ◽

Discharge Measurements

The electrochemical properties of poly sodium 4-styrenesulfonate intercalated graphite oxide (PSSGO) have been investigated in a 1 M H2SO4 electrolyte. We observed capacitor behavior at scan rate of 1–25 mV/s in a cyclic voltammetry. Specific capacitance obtained from galvanostatic charge and discharge measurements were 6 F/g to 102 F/g at 1 A/g to 0.1 A/g, respectively. The specific capacitance of PSSGO is relatively high compared to that of the precursor graphite oxide in which the specific capacitance was 11–20 F/g at 0.03 A/g. Capacitance retention was 73% after 3000 cycles, proving reliable cyclic stability up to 3000 cycles.