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C D Lokhande - One of the best experts on this subject based on the ideXlab platform.
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metal oxide thin film based Supercapacitors
Current Applied Physics, 2011Co-Authors: C D Lokhande, Deepak P DubalAbstract:Abstract Supercapacitors have been known for over fifty years and are considered as one of the potential energy storage systems. Research into Supercapacitors is presently based primarily on their mode of energy storage, namely: (i) the redox electrochemical capacitors and (ii) the electrochemical double layer capacitor. The commonly investigated classes of materials are transition metal oxides (notably, ruthenium oxide) and conducting polymers. Recently, many chemically deposited metal oxide thin film electrodes including ruthenium oxide, iridium oxide, manganese oxide, cobalt oxide, nickel oxide, tin oxide, iron oxide, pervoskites, ferrites etc. have been tested in Supercapacitors This review presents supercapacitor performance data of metal oxide thin film electrodes. The Supercapacitors exhibited the specific capacitance ( Sc ) values between 50 and 1100 F g −1 , which are quite comparable with bulk electrode values; therefore, it is likely that metal oxide films will continue to play a major role in supercapacitor technology.
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Metal oxide thin film based Supercapacitors
Current Applied Physics, 2011Co-Authors: C D Lokhande, Deepak P Dubal, Oh Shim JooAbstract:Supercapacitors have been known for over fifty years and are considered as one of the potential energy storage systems. Research into Supercapacitors is presently based primarily on their mode of energy storage, namely: (i) the redox electrochemical capacitors and (ii) the electrochemical double layer capacitor. The commonly investigated classes of materials are transition metal oxides (notably, ruthenium oxide) and conducting polymers. Recently, many chemically deposited metal oxide thin film electrodes including ruthenium oxide, iridium oxide, manganese oxide, cobalt oxide, nickel oxide, tin oxide, iron oxide, pervoskites, ferrites etc. have been tested in Supercapacitors This review presents supercapacitor performance data of metal oxide thin film electrodes. The Supercapacitors exhibited the specific capacitance (Sc) values between 50 and 1100 F g-1, which are quite comparable with bulk electrode values; therefore, it is likely that metal oxide films will continue to play a major role in supercapacitor technology. © 2010 Elsevier B.V. All rights reserved.
Deepak P Dubal - One of the best experts on this subject based on the ideXlab platform.
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metal oxide thin film based Supercapacitors
Current Applied Physics, 2011Co-Authors: C D Lokhande, Deepak P DubalAbstract:Abstract Supercapacitors have been known for over fifty years and are considered as one of the potential energy storage systems. Research into Supercapacitors is presently based primarily on their mode of energy storage, namely: (i) the redox electrochemical capacitors and (ii) the electrochemical double layer capacitor. The commonly investigated classes of materials are transition metal oxides (notably, ruthenium oxide) and conducting polymers. Recently, many chemically deposited metal oxide thin film electrodes including ruthenium oxide, iridium oxide, manganese oxide, cobalt oxide, nickel oxide, tin oxide, iron oxide, pervoskites, ferrites etc. have been tested in Supercapacitors This review presents supercapacitor performance data of metal oxide thin film electrodes. The Supercapacitors exhibited the specific capacitance ( Sc ) values between 50 and 1100 F g −1 , which are quite comparable with bulk electrode values; therefore, it is likely that metal oxide films will continue to play a major role in supercapacitor technology.
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Metal oxide thin film based Supercapacitors
Current Applied Physics, 2011Co-Authors: C D Lokhande, Deepak P Dubal, Oh Shim JooAbstract:Supercapacitors have been known for over fifty years and are considered as one of the potential energy storage systems. Research into Supercapacitors is presently based primarily on their mode of energy storage, namely: (i) the redox electrochemical capacitors and (ii) the electrochemical double layer capacitor. The commonly investigated classes of materials are transition metal oxides (notably, ruthenium oxide) and conducting polymers. Recently, many chemically deposited metal oxide thin film electrodes including ruthenium oxide, iridium oxide, manganese oxide, cobalt oxide, nickel oxide, tin oxide, iron oxide, pervoskites, ferrites etc. have been tested in Supercapacitors This review presents supercapacitor performance data of metal oxide thin film electrodes. The Supercapacitors exhibited the specific capacitance (Sc) values between 50 and 1100 F g-1, which are quite comparable with bulk electrode values; therefore, it is likely that metal oxide films will continue to play a major role in supercapacitor technology. © 2010 Elsevier B.V. All rights reserved.
Oh Shim Joo - One of the best experts on this subject based on the ideXlab platform.
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Metal oxide thin film based Supercapacitors
Current Applied Physics, 2011Co-Authors: C D Lokhande, Deepak P Dubal, Oh Shim JooAbstract:Supercapacitors have been known for over fifty years and are considered as one of the potential energy storage systems. Research into Supercapacitors is presently based primarily on their mode of energy storage, namely: (i) the redox electrochemical capacitors and (ii) the electrochemical double layer capacitor. The commonly investigated classes of materials are transition metal oxides (notably, ruthenium oxide) and conducting polymers. Recently, many chemically deposited metal oxide thin film electrodes including ruthenium oxide, iridium oxide, manganese oxide, cobalt oxide, nickel oxide, tin oxide, iron oxide, pervoskites, ferrites etc. have been tested in Supercapacitors This review presents supercapacitor performance data of metal oxide thin film electrodes. The Supercapacitors exhibited the specific capacitance (Sc) values between 50 and 1100 F g-1, which are quite comparable with bulk electrode values; therefore, it is likely that metal oxide films will continue to play a major role in supercapacitor technology. © 2010 Elsevier B.V. All rights reserved.
Hamid Gualous - One of the best experts on this subject based on the ideXlab platform.
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Modelling of the Supercapacitors during self-discharge
Epe Journal, 2020Co-Authors: Pascal Venet, Gerard Rojat, Zheng Ding, Hamid GualousAbstract:AbstractThe self-discharge behaviour of Supercapacitors is an important factor because it determines the duration time of stored energy on open circuit. For the supercapacitor technology with activated carbon and organic electrolyte, the self-discharge is based on two mechanisms [1]. The first is due to the diffusion of ions from regions of excess ionic concentration. The second is due to the leakage of charge across the double-layer at the electrolyte-carbon interfaces. This paper treats the modelling of the Supercapacitors, which takes into account the self-discharge phenomenon. Supercapacitor characterization is presented and analyzed, particularly the behaviour of self-discharge. To establish the supercapacitor model parameters, it’s proposed to supplement an existing equivalent circuit model [2] by adding some new elements, which can be, describe the supercapacitor self-discharge behaviour. Simulation and experimental results are presented and compared.
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Supercapacitor calendar aging for telecommunication applications
2016 IEEE International Telecommunications Energy Conference (INTELEC), 2016Co-Authors: Hamid Gualous, Hicham Chaoui, Roland GallayAbstract:This paper presents a supercapacitor prediction aging model according to the voltage and to the temperature for telecommunication applications. To investigate this phenomenon, an experimental test bench is designed to accelerate the Supercapacitors' calendar aging. Experimental tests are carried out at constant temperatures when the Supercapacitors are polarized at the maximum voltage. To quantify the supercapacitor's aging, the equivalent series resistance (ESR) and the equivalent capacitance (C) are measured using the DC and AC characterization, respectively. To determine the supercapacitor lifetime, Arrhenius law is considered which describes the effect of temperature on the velocity of a chemical reaction.
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Supercapacitor characterization for electric vehicle applications
4th International Conference on Power Engineering Energy and Electrical Drives, 2013Co-Authors: Hamid Gualous, Roland Gallay, Mamadou Bailo Camara, B. Boudrat, Brayima DakyoAbstract:This study deals with the dynamic and thermal behaviors of Supercapacitors. Characterization is performed using the Electrochemical Impedance Spectroscopy (EIS) method to determine by experiment the supercapacitor's series resistance (ESR) and capacitance according to the frequency. The study deals also the particular case of the supercapacitor's spectra and the thermal shock. Finally, life test at constant temperature and the impact of the vibration on the supercapacitor's parameters are illustrated.
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Supercapacitors - Supercapacitor Module Sizing and Heat Management under Electric, Thermal, and Aging Constraints
Supercapacitors, 2013Co-Authors: Hamid Gualous, Roland GallayAbstract:Supercapacitors have an important role to play in the development of electric power applications, mostly in the transport domain. Acceleration and braking of cars or trains generate or require a large amount of power during a few seconds. These conditions are particularly suitable for using Supercapacitors, which have a very high‐power density and a long lifetime compared to batteries. In these applications, the energetic performance depends mainly on the design of the supercapacitor modules. In automotive and rail applications, the supercapacitor modules are designed according to customer mission profiles of the vehicle. The design methods must also incorporate the constraints and the operating environment of the system (electrical stress, thermal constraints, vibration, etc.). Thus, supercapacitor modules must also work correctly and always provide the required power to the system during their lifetime. Therefore, it is vital to take into account the aging of these components in the phase of system designing. This chapter is devoted to the sizing of supercapacitor modules, taking into account the different constraints mentioned. Several designing methods are discussed and validated by simulation of some real applications. It is important to model the electrical and thermal behavior and the aging of the supercapacitor modules before the sizing. Temperature accelerates supercapacitor and module aging. A decrease in the capacitance and an increase in the series resistance are observed. Consequently, thermal management is a key issue concerning lifetime and performance of supercapacitor modules. We propose to begin this chapter by presenting the characterization, the electrical and thermal modeling and the aging of Supercapacitors and finish by the sizing of supercapacitor modules.
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Supercapacitor Module Sizing and Heat Management Under Electric, Thermal, and Aging Constraints
Supercapacitors: Materials, Systems, and Applications, 2013Co-Authors: Hamid Gualous, Roland GallayAbstract:Supercapacitors have an important role to play in the development of electric power applications, mostly in the transport domain. Acceleration and braking of cars or trains generate or require a large amount of power during a few seconds. These conditions are particularly suitable for using Supercapacitors, which have a very high-power density and a long lifetime compared to batteries. In these applications, the energetic performance depends mainly on the design of the supercapacitor modules. In automotive and rail applications, the supercapacitor modules are designed according to customer mission profiles of the vehicle. The design methods must also incorporate the constraints and the operating environment of the system (electrical stress, thermal constraints, vibration, etc.). Thus, supercapacitor modules must also work correctly and always provide the required power to the system during their lifetime. Therefore, it is vital to take into account the aging of these components in the phase of system designing. This chapter is devoted to the sizing of supercapacitor modules, taking into account the different constraints mentioned. Several designing methods are discussed and validated by simulation of some real applications. It is important to model the electrical and thermal behavior and the aging of the supercapacitor modules before the sizing. Temperature accelerates supercapacitor and module aging. A decrease in the capacitance and an increase in the series resistance are observed. Consequently, thermal management is a key issue concerning lifetime and performance of supercapacitor modules. We propose to begin this chapter by presenting the characterization, the electrical and thermal modeling and the aging of Supercapacitors and finish by the sizing of supercapacitor modules.
Ahmad Hussain - One of the best experts on this subject based on the ideXlab platform.
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high performance 2 6 v aqueous asymmetric Supercapacitors based on in situ formed na0 5mno2 nanosheet assembled nanowall arrays
Advanced Materials, 2017Co-Authors: Nawishta Jabeen, Ahmad HussainAbstract:: The voltage limit for aqueous asymmetric Supercapacitors is usually 2 V, which impedes further improvement in energy density. Here, high Na content Birnessite Na0.5 MnO2 nanosheet assembled nanowall arrays are in situ formed on carbon cloth via electrochemical oxidation. It is interesting to find that the electrode potential window for Na0.5 MnO2 nanowall arrays can be extended to 0-1.3 V (vs Ag/AgCl) with significantly increased specific capacitance up to 366 F g-1 . The extended potential window for the Na0.5 MnO2 electrode provides the opportunity to further increase the cell voltage of aqueous asymmetric Supercapacitors beyond 2 V. To construct the asymmetric supercapacitor, carbon-coated Fe3 O4 nanorod arrays are synthesized as the anode and can stably work in a negative potential window of -1.3 to 0 V (vs Ag/AgCl). For the first time, a 2.6 V aqueous asymmetric supercapacitor is demonstrated by using Na0.5 MnO2 nanowall arrays as the cathode and carbon-coated Fe3 O4 nanorod arrays as the anode. In particular, the 2.6 V Na0.5 MnO2 //Fe3 O4 @C asymmetric supercapacitor exhibits a large energy density of up to 81 Wh kg-1 as well as excellent rate capability and cycle performance, outperforming previously reported MnO2 -based Supercapacitors. This work provides new opportunities for developing high-voltage aqueous asymmetric Supercapacitors with further increased energy density.
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High-Performance 2.6 V Aqueous Asymmetric Supercapacitors based on In Situ Formed Na0.5MnO2Nanosheet Assembled Nanowall Arrays
Advanced Materials, 2017Co-Authors: Nawishta Jabeen, Qiuying Xia, Junwu Zhu, Shuo Sun, Ahmad Hussain, Hui XiaAbstract:The voltage limit for aqueous asymmetric Supercapacitors is usually 2 V, which impedes further improvement in energy density. Here, high Na content Birnessite Na0.5 MnO2 nanosheet assembled nanowall arrays are in situ formed on carbon cloth via electrochemical oxidation. It is interesting to find that the electrode potential window for Na0.5 MnO2 nanowall arrays can be extended to 0-1.3 V (vs Ag/AgCl) with significantly increased specific capacitance up to 366 F g(-1) . The extended potential window for the Na0.5 MnO2 electrode provides the opportunity to further increase the cell voltage of aqueous asymmetric Supercapacitors beyond 2 V. To construct the asymmetric supercapacitor, carbon-coated Fe3 O4 nanorod arrays are synthesized as the anode and can stably work in a negative potential window of -1.3 to 0 V (vs Ag/AgCl). For the first time, a 2.6 V aqueous asymmetric supercapacitor is demonstrated by using Na0.5 MnO2 nanowall arrays as the cathode and carbon-coated Fe3 O4 nanorod arrays as the anode. In particular, the 2.6 V Na0.5 MnO2 //Fe3 O4 @C asymmetric supercapacitor exhibits a large energy density of up to 81 Wh kg(-1) as well as excellent rate capability and cycle performance, outperforming previously reported MnO2 -based Supercapacitors. This work provides new opportunities for developing high-voltage aqueous asymmetric Supercapacitors with further increased energy density.
