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Nanostructured metal-oxides for use as high power and energy density storage electrodes

Saruhan, Bilge and Mondragón Rodríguez, G.C. (2014) Nanostructured metal-oxides for use as high power and energy density storage electrodes. In: Proc. SPIE-The International Society for Optical Engineering, Harvesting and Storage: Materials, Devices, and Applications V, Vol. 9 (911500). SPIE- The International Society for Optical Engineering, Energy Harvesting and Storage, 5.-9 Mai. 2014, Baltimore Maryland, USA. ISBN doi:10.1117/12.2053009

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Abstract

The most significant advantage of double layer supercapacitors over batteries is their ability of being almost continuously charged and discharged without degradation. This is why batteries and supercapacitors are complementary to each other. The supercapacitors can supply power to the system when there are surges or energy bursts relying on their fast charge/discharge ability while the batteries can supply the bulk energy since they can store and deliver larger amount of energy over a longer period of time. With the introduction of new electrodes, super-capacitors will provide higher energy densities and charge rapidly with longer lifetimes, relying on the addition of pseudo-capacitance as well as higher surface areas. Pseudo-capacitance is achieved by the use of metal-oxides yielding faradaic reactions over redox couples. Capacitive charge-storage properties of mesoporous films made of complex metal-oxides preferably in core + shell architecture are superior to those of non-porous crystalline metal-oxides. RuO2 yields the highest energy densities however is not attractive for commercial use due to high cost. Other promising candidates are MnO2, Co2O3, NiO, etc. which need to be improved for achievement of long-term stability. Additionally, the type of electrolyte is important to improve the performance of a supercapacitor. This work describes the fabrication and performance of mesoporous double oxides (MnCu, MnNi, MnCo) in aqueous electrolytes. Thin films are deposited by sputtering technique on graphite foils. Specific capacitance, energy and power densities are calculated and the role of electrolyte on electrode performance is discussed.

Item URL in elib:https://elib.dlr.de/90735/
Document Type:Conference or Workshop Item (Speech)
Additional Information:Dr. B. Saruhan hat den Vortrag gehalten
Title:Nanostructured metal-oxides for use as high power and energy density storage electrodes
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Saruhan, BilgeBilge.Saruhan (at) dlr.deUNSPECIFIED
Mondragón Rodríguez, G.C.guillermo.mondragon-rodriguez (at) dlr.deUNSPECIFIED
Date:5 June 2014
Journal or Publication Title:Proc. SPIE-The International Society for Optical Engineering, Harvesting and Storage: Materials, Devices, and Applications V
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:Vol. 9
Editors:
EditorsEmail
K. Dhar, NibirUNSPECIFIED
Balaya, PalaniUNSPECIFIED
K. Dutta, AchyutUNSPECIFIED
ISBN:doi:10.1117/12.2053009
Status:Published
Keywords:Manganese oxide, supercapacitors, pseudo-capacitance, reactive sputtering, energy density, specific capacitance
Event Title:SPIE- The International Society for Optical Engineering, Energy Harvesting and Storage
Event Location:Baltimore Maryland, USA
Event Type:international Conference
Event Dates:5.-9 Mai. 2014
Organizer:SPIE The International Society for Optics and Photonics
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:propulsion systems
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Turbine Technologies
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > High Temperature and Functional Coatings
Deposited By: Mondragon Rodriguez, Guillermo Cesar
Deposited On:04 Nov 2014 14:57
Last Modified:01 Dec 2018 19:50

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