All-Solid-State Asymmetric Supercapacitor Based on Ni–Co Layered Double Hydroxide and rGO Nanocomposite Deposited on Ni Foam

2020 ◽  
Vol 17 (3) ◽  
Author(s):  
P. E. Lokhande ◽  
U. S. Chavan
Keyword(s):  
Alternative Energy ◽  
Negative Electrode ◽  
Asymmetric Supercapacitor ◽  
Nickel Substrate ◽  
Active Mass ◽  
Supercapacitor Application ◽  
Energy Storage Technology ◽  
Potential Applications ◽  
Double Hydroxide ◽  
A Current

Abstract In recent years, supercapacitors have been extensively exploited as an alternative energy storage technology in various fields such as electronics, computer, and mechanical. In this context, we have reported the utilization of the Ni–Co LDH/rGO nanostructure, deposited on the 3D conductive nickel substrate, to fabricate electrode for supercapacitor application. The film formed on the nickel substrate demonstrated superior electric conductivity and higher surface area which resulted in rapid electron transfer and more active mass deposition. Vertical nanorods grown on the rGO sheet was found to maximize electrode performance with a maximum specific capacitance of 2987 Fg−1at a current density of 1 Ag−1. The asymmetric supercapacitor was fabricated with Ni–Co LDH/rGO as a positive electrode and rGO as a negative electrode, which has rendered an energy density of 39.9 Wh/kg with a power density of 1.48 kW/kg1. Based on the obtained results, the fabricated supercapacitor is envisioned to be exploited in various potential applications.

scholarly journals Ablation in Externally Applied Electric and Magnetic Fields

Nanomaterials ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 182
Author(s):  
Jovan Maksimovic ◽  
Soon-Hock Ng ◽  
Tomas Katkus ◽  
Nguyen Hoai An Le ◽  
James W.M. Chon ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Laser Ablation ◽  
Lorentz Force ◽  
Negative Electrode ◽  
Magnetic Flux Density ◽  
Ripple Formation ◽  
Electric And Magnetic Fields ◽  
Potential Applications ◽  
Application Potential ◽  
X Ray Absorption

To harness light-matter interactions at the nano-/micro-scale, better tools for control must be developed. Here, it is shown that by applying an external electric and/or magnetic field, ablation of Si and glass under ultra-short (sub-1 ps) laser pulse irradiation can be controlled via the Lorentz force F = e E + e [ v × B ] , where v is velocity of charge e, E is the applied electrical bias and B is the magnetic flux density. The external electric E-field was applied during laser ablation using suspended micro-electrodes above a glass substrate with an air gap for the incident laser beam. The counter-facing Al-electrodes on Si surface were used to study debris formation patterns on Si. Debris was deposited preferentially towards the negative electrode in the case of glass and Si ablation. Also, an external magnetic field was applied during laser ablation of Si in different geometries and is shown to affect ripple formation. Chemical analysis of ablated areas with and without a magnetic field showed strong chemical differences, revealed by synchrotron near-edge X-ray absorption fine structure (NEXAFS) measurements. Harnessing the vectorial nature of the Lorentz force widens application potential of surface modifications and debris formation in external E-/B-fields, with potential applications in mass and charge spectroscopes.

scholarly journals DETERGENT WASTE CONDUCTIVITY IN PRODUCING ELECTRICITY

2019 ◽  
Vol 3 (2) ◽  
Author(s):  
Asti Riani Putri
Keyword(s):  
Alternative Energy ◽  
Power Plants ◽  
Subsequent Development ◽  
High Price ◽  
Water Volume ◽  
Small Communities ◽  
The Road ◽  
On The Road ◽  
A Current ◽  
At Home

The importance of socialization about alternative energy that can be used for daily needs, for example from the simplest such as lighting at home, although not permanent but is very useful in the event of a sudden power outage. The high price of electricity makes small communities have to think twice as much to regulate daily expenditure needs so as to encourage to find alternative energy that can produce electricity that is environmentally friendly. Seeing the large number of detergent products in Indonesia, it inspires to process the waste from laundry clothes or other objects and even the detergent water itself, because so far the used laundry waste is thrown away so that it can pollute the environment. The purpose of this study is to reduce the effect of environmental pollution due to used laundry waste which is used as an alternative energy source to turn on lighting lamps at home or even on the road. The method used in this research is a chemical or electrolysis reaction involving zinc and carbon as well as the content in detergent washing water. From several experiments conducted for 3 detergents with several parameters, namely the amount of mass and water volume of 120 ml. From the experiment the voltage is 1 volt with a current of 2 mA for detergent Rinso, for DAIA detergent the voltage is 0.7 and current is 0.56 mA, and the experiments tested on SOKLIN produce a voltage of 0.8 volt and a current of 1 mA. Whereas the testing which was carried out randomly with a volume of 1200 ml water produced a voltage of 0.547 v with a large current of 0.006 mA. This proves that detergent waste can be utilized as a renewable energy although it still requires further research but this can ease the burden on the community to pay for electricity from PLN and in the subsequent development independent power plants are built in each house so that the community can save on electricity.

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 Nanostructure selenium compounds as pseudocapacitive electrodes for high-performance asymmetric supercapacitor

2018 ◽  
Vol 5 (1) ◽  
pp. 171186 ◽  
Author(s):  
Guofu Ma ◽  
Fengting Hua ◽  
Kanjun Sun ◽  
Enke Fenga ◽  
Hui Peng ◽  
...  
Keyword(s):  
Electrode Materials ◽  
Rate Capability ◽  
Negative Electrode ◽  
High Specific Capacitance ◽  
High Energy ◽  
Cycling Stability ◽  
High Energy Density ◽  
Storage Device ◽  
Asymmetric Supercapacitor ◽  
Capacitance Performance

The electrochemical performance of an energy conversion and storage device like the supercapacitor mainly depends on the microstructure and morphology of the electrodes. In this paper, to improve the capacitance performance of the supercapacitor, the all-pseudocapacitive electrodes of lamella-like Bi 18 SeO 29 /BiSe as the negative electrode and flower-like Co 0.85 Se nanosheets as the positive electrode are synthesized by using a facile low-temperature one-step hydrothermal method. The microstructures and morphology of the electrode materials are carefully characterized, and the capacitance performances are also tested. The Bi 18 SeO 29 /BiSe and Co 0.85 Se have high specific capacitance (471.3 F g –1 and 255 F g –1 at 0.5 A g –1 ), high conductivity, outstanding cycling stability, as well as good rate capability. The assembled asymmetric supercapacitor completely based on the pseudocapacitive electrodes exhibits outstanding cycling stability (about 93% capacitance retention after 5000 cycles). Moreover, the devices exhibit high energy density of 24.2 Wh kg –1 at a power density of 871.2 W kg –1 in the voltage window of 0–1.6 V with 2 M KOH solution.

A free-standing manganese cobalt sulfide@cobalt nickel layered double hydroxide core–shell heterostructure for an asymmetric supercapacitor

2020 ◽  
Vol 49 (1) ◽  
pp. 196-202 ◽  
Author(s):  
Haoyan Liang ◽  
Tiesong Lin ◽  
Shengyao Wang ◽  
Henan Jia ◽  
Chun Li ◽  
...  
Keyword(s):  
Layered Double Hydroxide ◽  
High Performance ◽  
Rational Design ◽  
Electrode Materials ◽  
Cobalt Sulfide ◽  
Core Shell ◽  
Asymmetric Supercapacitor ◽  
Free Standing ◽  
Cobalt Nickel ◽  
Double Hydroxide

Rational design of self-supported electrode materials is important to develop high-performance supercapacitors.

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.

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