Facile electrosynthesis, characterisation and electrochemical performance of poly ortho aminophenol/Al5Y3O12 nanocomposite as a new high efficient supercapacitor

RSC Advances ◽  
2016 ◽  
Vol 6 (47) ◽  
pp. 41045-41052 ◽  
Author(s):  
J. Torabian ◽  
M. G. Mahjani ◽  
H. Mohammad Shiri ◽  
A. Ehsani ◽  
J. Shabani Shayeh
Keyword(s):  
Electrochemical Performance ◽  
Electrochemical Deposition ◽  
Active Electrode ◽  
Electrochemical Supercapacitor ◽  
High Efficient

In this paper, firstly Al5Y3O12 has been synthesized without any impurities using pulse electrochemical deposition and then fabricated POAP/YAG films to serve as the active electrode for the electrochemical supercapacitor.

Electrochemical in situ construction of vanadium oxide heterostructures with boosted pseudocapacitive charge storage

2020 ◽  
Vol 8 (3) ◽  
pp. 1176-1183 ◽  
Author(s):  
Ran Dong ◽  
Yu Song ◽  
Duo Yang ◽  
Hua-Yu Shi ◽  
Zengming Qin ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Vanadium Oxide ◽  
Electrochemical Deposition ◽  
Charge Storage ◽  
Deposition Method ◽  
High Quality ◽  
Oxide Heterostructures ◽  
Electrochemical Deposition Method ◽  
Enhanced Electrochemical Performance

An in situ electrochemical deposition method is demonstrated as an efficient strategy to build high-quality vanadium oxide heterostructures with enhanced electrochemical performance.

Enhanced electrochemical supercapacitor performance with a three-dimensional porous boron-doped diamond film

2019 ◽  
Vol 43 (47) ◽  
pp. 18813-18822
Author(s):  
Xue Wang ◽  
Yapeng He ◽  
Zhongcheng Guo ◽  
Hui Huang ◽  
Panpan Zhang ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Diamond Film ◽  
Three Dimensional ◽  
Boron Doped Diamond ◽  
Boron Doped ◽  
Electrochemical Supercapacitor ◽  
Supercapacitor Performance ◽  
Wide Potential

A three-dimensional porous boron-doped diamond film is developed to enhance the electrochemical performance of supercapacitors in a wide potential window.

scholarly journals On the Beneficial Effect of MgCl2 as Electrolyte Additive to Improve the Electrochemical Performance of Li4Ti5O12 as Cathode in Mg Batteries

Nanomaterials ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 484 ◽  
Author(s):  
Marta Cabello ◽  
Gregorio Ortiz ◽  
Pedro Lavela ◽  
José Tirado
Keyword(s):  
Electrochemical Performance ◽  
Structural Changes ◽  
Surface Film ◽  
Practical Importance ◽  
Specific Capacity ◽  
Ex Situ ◽  
Insertion Reaction ◽  
Portable Devices ◽  
Active Electrode ◽  
X Ray

Magnesium batteries are a promising technology for a new generation of energy storage for portable devices. Attention should be paid to electrolyte and electrode material development in order to develop rechargeable Mg batteries. In this study, we report the use of the spinel lithium titanate or Li4Ti5O12 (LTO) as an active electrode for Mg2+-ion batteries. The theoretical capacity of LTO is 175 mA h g−1, which is equivalent to an insertion reaction with 1.5 Mg2+ ions. The ability to enhance the specific capacity of LTO is of practical importance. We have observed that it is possible to increase the capacity up to 290 mA h g−1 in first discharge, which corresponds to the reaction with 2.5 Mg2+ ions. The addition of MgCl2·6H2O to the electrolyte solutions significantly improves their electrochemical performance and enables reversible Mg deposition. Ex-situ X-ray diffraction (XRD) patterns reveal little structural changes, while X-ray photoelectron spectrometer (XPS) (XPS) measurements suggest Mg reacts with LTO. The Ti3+/Ti4+ ratio increases with the amount of inserted magnesium. The impedance spectra show the presence of a semicircle at medium-low frequencies, ascribable to Mg2+ ion diffusion between the surface film and LTO. Further experimental improvements with exhaustive control of electrodes and electrolytes are necessary to develop the Mg battery with practical application.

scholarly journals Structural correlation of a nanoparticle-embedded mesoporous CoTiO3 perovskite for an efficient electrochemical supercapacitor

RSC Advances ◽  
2020 ◽  
Vol 10 (39) ◽  
pp. 23446-23456 ◽  
Author(s):  
Narasimharao Kitchamsetti ◽  
Ram J. Choudhary ◽  
Deodatta M. Phase ◽  
Rupesh S. Devan
Keyword(s):  
Electrochemical Performance ◽  
Specific Capacitance ◽  
Electrochemical Supercapacitor ◽  
Structural Correlation

Interconnecting nanoparticle embedded mesoporous CTO rods (left panel), offered a significantly larger diffusion of OH− ions deep inside the rod structure and delivered a stable electrochemical performance with a specific capacitance of 608.4 F g−1 (right panel).

scholarly journals Intensification of Pseudocapacitance by Nanopore Engineering on Waste-Bamboo-Derived Carbon as a Positive Electrode for Lithium-Ion Batteries

Materials ◽  
2019 ◽  
Vol 12 (17) ◽  
pp. 2733
Author(s):  
Jong Chan Hyun ◽  
Jin Hwan Kwak ◽  
Min Eui Lee ◽  
Jaewon Choi ◽  
Jinsoo Kim ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Nanoporous Carbon ◽  
Positive Electrode ◽  
High Rate ◽  
Active Electrode ◽  
Voltage Range ◽  
High Specific Energy

Nanoporous carbon, including redox-active functional groups, can be a promising active electrode material (AEM) as a positive electrode for lithium-ion batteries owing to its high electrochemical performance originating from the host-free surface-driven charge storage process. This study examined the effects of the nanopore size on the pseudocapacitance of the nanoporous carbon materials using nanopore-engineered carbon-based AEMs (NE-C-AEMs). The pseudocapacitance of NE-C-AEMs was intensified, when the pore diameter was ≥2 nm in a voltage range of 1.0~4.8 V vs Li+/Li under the conventional carbonate-based electrolyte system, showing a high specific capacity of ~485 mA·h·g−1. In addition, the NE-C-AEMs exhibited high rate capabilities at current ranges from 0.2 to 4.0 A·g−1 as well as stable cycling behavior for more than 300 cycles. The high electrochemical performance of NE-C-AEMs was demonstrated by full-cell tests with a graphite nanosheet anode, where a high specific energy and power of ~345 Wh·kg−1 and ~6100 W·Kg−1, respectively, were achieved.

scholarly journals Doping and Surface Modification Enhance the Applicability of Nanostructured Fullerene-MWCNT Hybrid Draped LiNi0.1Mg0.1Co0.8O2 As High Efficient Cathode Material for Lithium-Ion Batteries

2021 ◽  
Author(s):  
Arockia Shyamala Paniyarasi S ◽  
Suja S K ◽  
Nimma Elizabeth R
Keyword(s):  
Electron Microscopy ◽  
Diffusion Coefficient ◽  
Surface Modification ◽  
Electrochemical Performance ◽  
Cathode Material ◽  
Structural Stability ◽  
Cathode Materials ◽  
Transfer Resistance ◽  
X Ray ◽  
High Efficient

Abstract Development of high performance cathode materials, layer-structured ternary LiNi x Co y M 1-x-y O 2 cathode materials have attracted much attention owing to their larger capacity and higher energy density.Persistent efforts have been devoted to tackling certain issues like low electronic conductivity and poor structural stability. Dual strategy of Mg doping and surface modification of the cathode material was adopted to improve the performance of the battery. Fullerene-Multi-Walled Carbon Nanotube (MWCNT) hybrid draped LiNi 0.1 Mg 0.1 Co 0.8 O 2 nanocomposite was synthesized by a simple chemical route. The fullerene-MWCNT hybrid modifies the surface of pristine LiNi 0.1 Mg 0.1 Co 0.8 O 2 thereby improves the electrochemical performance and maintains the structural stability of the cathode material. Pristine LiNi 0.1 Mg 0.1 Co 0.8 O 2 and LiNi 0.1 Mg 0.1 Co 0.8 O 2 / fullerene-MWCNT nanocomposite were studied using various advanced characterization techniques such as X-ray diffraction (XRD), Micro-Raman spectroscopy, Field Emission Scanning Electron Microscopy (FESEM), X-ray Photoelectron Spectroscopy (XPS), and High-Resolution Transmission Electron Microscopy (HRTEM). It is found that LiNi 0.1 Mg 0.1 Co 0.8 O 2 particles retain their structural integrity after being enveloped with a fullerene-MWCNT hybrid. The electrochemical performance was investigated with cyclic voltammetry(CV), galvanostaticcharge-discharge(GCD) test and electrochemical impedance spectroscopy(EIS). As prepared LiNi 0.1 Mg 0.1 Co 0.8 O 2 , when deployed in the form of LiNi 0.1 Mg 0.1 Co 0.8 O 2 / fullerene-MWCNT composite exhibits a high specific capacity of 208 mAh g -1 .Fullerene-MWCNT hybrid draped LiNi 0.1 Mg 0.1 Co 0.8 O 2 nanocomposite provides an effective Li + and electron channel that significantly increased the Li-ion diffusion coefficient and reduced the charge transfer resistance. Besides,the lithium diffusion coefficient increased from 5.13 x 10 -13 (Li/LiNi 0.1 Mg 0.1 Co 0.8 O 2 ) to 8.313 x 10 -13 cm 2 s -1 due to the improved kinetics of Li insertion/extraction process in Li/LiNi 0.1 Mg 0.1 Co 0.8 O 2 +fullerene-MWCNT cell.

Sign in / Sign up

Export Citation Format

Share Document