Optimal speed and charge/discharge control of a train with onboard energy storage devices for minimum energy operation

2008 ◽  
Author(s):  
Masafumi Miyatake ◽  
Kunihiko Matsuda
Keyword(s):  
Energy Storage ◽  
Minimum Energy ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Optimal Speed ◽  
Charge Discharge

Electrode materials based on α-NiCo(OH)2 and rGO for high performance energy storage devices

RSC Advances ◽  
2016 ◽  
Vol 6 (104) ◽  
pp. 102504-102512 ◽  
Author(s):  
J. M. Gonçalves ◽  
R. R. Guimarães ◽  
C. V. Nunes ◽  
A. Duarte ◽  
B. B. N. S. Brandão ◽  
...  
Keyword(s):  
Composite Material ◽  
Energy Storage ◽  
Energy Density ◽  
High Performance ◽  
Electrode Materials ◽  
High Energy ◽  
High Energy Density ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Charge Discharge

Described herein is a composite material based on rGO and α-NiCo(OH)2 nanoparticles combining very fast charge/discharge processes with the high energy density of batteries, suitable for application in high performance energy storage devices.

scholarly journals Charge-Discharge Characteristics of Textile Energy Storage Devices Having Different PEDOT:PSS Ratios and Conductive Yarns Configuration

Polymers ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 345 ◽  
Author(s):  
Ida Nuramdhani ◽  
Manoj Jose ◽  
Pieter Samyn ◽  
Peter Adriaensens ◽  
Benny Malengier ◽  
...  
Keyword(s):  
Energy Storage ◽  
Resistivity Measurement ◽  
Conductive Polymer ◽  
Underlying Mechanism ◽  
Energy Storage Devices ◽  
Discharge Performance ◽  
Storage Devices ◽  
Capacitive Behavior ◽  
Conductive Yarns ◽  
Charge Discharge

Conductive polymer PEDOT:PSS, sandwiched between two conductive yarns, has been proven to have capacitive behavior in our textile energy storage devices. Full understanding of its underlying mechanism is still intriguing. The effect of the PEDOT to PSS ratio and the configuration of the electrode yarns are the focus of this study. Three commercial PEDOT:PSS yarns, Clevios P-VP-AI-4083, Ossila AI 4083, and Orgacon ICP 1050, as well as stainless steel and silver-coated polybenzoxazole (Ag/PBO) yarns, in various combinations, were used as solid electrolytes and electrodes, respectively. Analyses with NMR, ICP-OES, TGA, and resistivity measurement were employed to characterize the PEDOT:PSS. The device charge-discharge performance was measured by the Arduino microcontroller. Clevios and Ossila were found to have identical characteristics with a similar ratio, that is, 1:5.26, hence a higher resistivity of 1000 Ω.cm, while Orgacon had a lower PEDOT to PSS ratio, that is, 1:4.65, with a lower resistivity of 0.25–1 Ω.cm. The thermal stability of PEDOT:PSS up to 250 °C was proven. Devices with PEDOT:PSS having lower conductivity, such as Clevios P-VP-AI-4083 or Ossila AI 4083, showed capacitive behavior. For a better charge-discharge profile, it is also suggested that the PEDOT to electrode resistance should be low. These results led to a conclusion that a larger ratio of PEDOT to PSS, having higher resistivity, is more desirable, but further research is needed.

Boundaries of charge-discharge curves of batteries

2022 ◽  
Author(s):  
Amir Haghipour ◽  
Maryam TaherTalari ◽  
Mohammad Mahdi Kalantarian
Keyword(s):  
Energy Storage ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Li Ion ◽  
Underlying Mechanisms ◽  
Discharge Behaviour ◽  
Charge Discharge ◽  
Discharge Curves

Understanding underlying mechanisms of charge-discharge behaviour of batteries, especially the intercalation Li-ion and Na-ion ones, is obligatory to develop and design the energy storage devices. The behaviour of the voltage-capacity/time...

scholarly journals Synthesis of Molybdenum Sulfide/Tellurium Hetero-Composite by a Simple One-Pot Hydrothermal Technique for High-Performance Supercapacitor Electrode Material

Nanomaterials ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 2346
Author(s):  
Hem Prakash Karki ◽  
Hyojae Kim ◽  
Jinmu Jung ◽  
Jonghyun Oh
Keyword(s):  
Energy Storage ◽  
Electrode Material ◽  
High Performance ◽  
Galvanostatic Charge ◽  
Energy Storage Devices ◽  
One Pot ◽  
Hydrothermal Technique ◽  
Storage Devices ◽  
Charge Discharge

It is necessary to investigate effective energy storage devices that can fulfill the requirements of short-term and long-term durable energy outputs. Here, we report a simple one-pot hydrothermal technique through which to fabricate the MoS2/Te nanocomposite to be used as an effective electrode material for high-performance supercapacitors. Comprehensive characterization of the as-fabricated nanomaterial was performed using FESEM, HRTEM, XRD, FTIR, XPS, etc., as well as electrochemical characterizations. The electrochemical characterization of the as-fabricated nanocomposite electrode material showed a high specific capacitance of 402.53 F g−1 from a galvanostatic charge-discharge (GCD) profile conducted at 1 A g−1 current density. The electrode material also showed significant rate performance with high cyclic stability reaching up to 92.30% under 4000 cycles of galvanostatic charge-discharge profile at a current density of 10 A g−1. The highly encouraging results obtained using this simple synthetic approach demonstrate that the hetero-structured nanocomposite of MoS2/Te electrode material could serve as a promising composite to use in effective supercapacitors or energy storage devices.

scholarly journals Hybridisation of battery, supercapacitor and hybrid capacitor for load applications with high crest factors: a case study of electric vehicles

2019 ◽  
Vol 16 (2) ◽  
pp. 614
Author(s):  
Immanuel Ninma Jiya ◽  
Nicoloy Gurusinghe ◽  
Rupert Gouws
Keyword(s):  
Energy Storage ◽  
Electric Vehicles ◽  
The Novel ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Multiple Input ◽  
Optimum Utilization ◽  
Hybrid Capacitors ◽  
Charge Discharge

This paper proposes a novel topology of hybridizing battery, supercapacitor and hybrid capacitor for optimum utilization of energy in electric vehicles. Hybridization of energy storage has been the theme of much research in the field of power electronics as it is an effective economic solution towards improving the utilization of energy. Batteries have fallen short in comparison to both supercapacitors and hybrid capacitors because of their low power density and limited charge-discharge cycle. Most of the previous research in this field focuses on hybridizing either supercapacitor or hybrid capacitor with the battery but not both. This paper deals with the combination of both supercapacitor and hybrid capacitor with the battery thus addressing the problem of the lack of autonomy between two recharge points in supercapacitors, three hybridization techniques are considered and the balance point of the supercapacitor and hybrid capacitor banks is presented. The prospects of using a multiple-input DC-DC converter is also analyzed. An experimental electric vehicle profile was used to verify the proposed topology and the results are presented. The application of the novel hybridization of the three energy storage devices can be extended to other applications having a load profile with high crest factors.

Effect of substrate on the performance of flexible energy storage devices based on surface modified C60 – β Ni(OH)2 nanocomposite

2021 ◽  
Vol 13 ◽  
Author(s):  
Soorya Sasi ◽  
Sunish K. Sugunan ◽  
Radhakrishnan Nair P. ◽  
Suresh Mathew
Keyword(s):  
Electrical Conductivity ◽  
Energy Storage ◽  
Specific Capacitance ◽  
Current Collector ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Binder Free ◽  
Surface Modified ◽  
Inorganic Composite ◽  
Charge Discharge

Aim: Aim of this study is to find the effect of the current collector in the performance of flexible energy storage devices based on surface modified organic-inorganic composite. Objective: As a part of our pursuit to develop flexible supercapacitive electrodes, we recently reported the fabrication of an electrode from an organic-inorganic composite slurry of surface functionalized fullerene and nickel hydroxide coated onto a copper sheet substrate using simple doctor blade method. We reported that the electrodes deliver specific energy and specific power of 661.5 Wh/kg and 8.8 KW/kg, respectively, and a specific capacitance of 675 Fg−1, which showed excellent cycling stabilities. In an effort to search for various combinatorial combinations of the composite and the substrate, in lieu of copper, in the present study, we incorporate nickel sheet as the current collector. Methods: The structure and composition of the binder-free, flexible super capacitive electrodes were characterized using XRD, TEM, FTIR, XPS, BET, Raman Spectroscopy, and their electrochemical properties were characterized using cyclic voltammetry, galvanostatic charge-discharge measurements, chronoamperommetry and impedance spectroscopy. Result: The as-prepared films stuck readily onto the substrate without the need of any binder material, exhibited remarkable flexibility, and were proven to be crack-free when subjected to repeated bending and twisting. The developed flexible super capacitive electrodes deliver a specific capacitance of 296 F g−1, maximum energy density of 82.2 Wh kg−1, and a maximum power density of 1056 W kg−1. The device retains 91.2 % of its capacitance when subjected to 1000 charge-discharge cycles. Conclusion: Our observations indicate that copper is the better choice as the current collector, which can be ascribed to the better electrical conductivity of copper compared to nickel. We conclude that the poor electrical conductivity of nickel sheet compared to copper substrate make the bottleneck for the performance of electrodes made using nickel substrate. To recapitulate, judicious choice of a current collector with high electrical conductivity along with a suitable surface modification strategy to form a composite in an amorphous form that forms smooth slurry are vital to the fabrication of binder-free, flexible supercapacitive devices.

Study of Nanoporous Carbon Fabrics for Rechargeable Energy Storage Capacitors

MRS Advances ◽  
2017 ◽  
Vol 2 (54) ◽  
pp. 3255-3261 ◽  
Author(s):  
Sergey M. Karabanov ◽  
Vladimir G. Litvinov ◽  
Andrey S. Karabanov
Keyword(s):  
Energy Storage ◽  
Equivalent Circuit ◽  
Carbon Material ◽  
Material Structure ◽  
Energy Storage Devices ◽  
Discharge Characteristics ◽  
Storage Devices ◽  
Charge Discharge ◽  
Carbon Fabrics

ABSTRACTThe present paper examines nanoporous material – carbon fabrics, which is used as electrodes in rechargeable energy storage capacitors (ultracapacitors). The fabrics structure, impurities composition, the influence of impurity types on ultracapacitor characteristics and the influence of thermal treatments on the impurities concentration are studied. The analysis of the ultracapacitor equivalent circuit with the studied material is made and the capacitor charge-discharge characteristics are investigated.The performed studies resulted in determination of the investigated carbon material structure, determination of impurities composition of carbon material and change of impurities content depending on thermal treatment in vacuum. The optimum temperature range for treatment in vacuum is established. The equivalent circuit of the ultracapacitor is analyzed and its charge-discharge characteristics are investigated. The chosen equivalent circuit makes it possible to estimate the influence of pores different size on the ultracapacitor charge-discharge characteristics that is important for its application in energy storage devices.

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