Development and Characterization of Glassy Carbon Electrodes for a Bipolar Electrochemical Double Layer Capacitor (Paperback)
Language: English
Published by Independently Published, 1999
- Softcover
- New
Seller: AussieBookSeller, Truganina, VIC, AustraliaAussieBookSeller
AbeBooks seller since June 22, 2007
Condition: New
£ 42.81
Quantity: 1 available
Add to basketItem description from seller
Paperback. Die thermische Gasphasen-Oxidation (Aktivierung) von Glaskohlenstoff (GK) sowie bipolare monolithische Elektroden aus derart aktiviertem GK wurden untersucht.Die Untersuchung hatte zum Ziel, den Aktivierungsprozess zu verstehen und Kor-relationen zwischen Prozessparametern und Materialgroessen sowie den Elektrodeneigenschaften zu nden. Mit diesem Wissen sollte es m]oglich sein, die Elek-trodeneigenschaften zu optimieren.Die thermische Aktivierung von GK erzeugt auf seiner Ober]ache einen por]osen Film, der mit zunehmender Aktivierung in den GK hineinw]achst.Die Filmdicke wurde an unterschiedlichen GK-Platten und -Folien mit dem Raster-Elektronenmikroskop bestimmt.Die Mikro- und Mesostruktur der Proben wurde mit R]ontgenbeugung und mit Roentgenkleinwinkelstreuung untersucht.Die innere Ober]ache von aktivierten GK-Proben wurde mit Gasadsorptionsmes-sungen und mit R]ontgenkleinwinkelstreuung bestimmt.Die Doppelschichtkapazit]at und der Diffusionswiderstand von GK-Proben wur-den mittels Elektrochemischer Impedanzspektroskopie bestimmt.Untersuchungen an GK mit unterschiedlicher Pyrolysetemperatur zeigen eine Kor-relation von Pyrolysetemperatur und maximal erzielbarer Filmdicke: Je h]oher die Pyrolysetemperatur, umso kleiner die asymptotische Filmdicke.R]ontgenbeugung an GK mit unterschiedlicher Pyrolysetemperatur zeigt eine Kor-relation der Pyrolysetemperatur mit Intensit]at und Halbwertsbreite prominenter Beugungspeaks: Je h]oher die Pyrolysetemperatur, umso geringer ist die Defekt-dichte in GK.Daraus folgt die Korrelation von asymptotischer Filmdicke und Defektdichte, die ein qualitatives Mass f]ur den experimentell schwer zug]anglichen, f]ur die Filmbil-dung aber sehr wichtigen effektiven Diffusionskoefzienten Deff. ist.Ergebnisse aus der R]ontgenkleinwinkelstreuung zeigen, dass die Durchmesser der Mikroporen von GK bei 10 bis 20 A liegen und dass die Porengr]ossenverteilung nicht sehr scharf ist.Ein nicht zu vernachl]assigender Teil der Poren liegt daher im Gr]ossenbereich un-terhalb 7 A bis 9 A, der nicht benetzt werden kann und damit nicht zur Dop-pelschichtkapazit]at beitr]agt.Der Diffusionswiderstand hat ein Minimum (etwa 50 mcm2) nach einer bes-timmten Aktivierzeit (etwa 30 bis 60 Minuten). F]ur l]angere Aktivierzeiten steigt der Diffusionswiderstand monoton. Shipping may be from our Sydney, NSW warehouse or from our UK or US warehouse, depending on stock availability.…
Seller Inventory # 9781099831812
- Title
- Development and Characterization of Glassy Carbon Electrodes for a Bipolar Electrochemical Double Layer Capacitor (Paperback)
- Author
- Artur Braun
- Publisher
- Independently Published
- Publication year
- 1999
- Condition
- new
- Binding
- Paperback
- Language
- English
- ISBN 10
- 1099831814
- ISBN 13
- 9781099831812
"Synopsis" may belong to another edition of this title.
AussieBookSeller
Truganina, VIC, Australia
AbeBooks seller since June 22, 2007
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| Item | 25 to 45 business days | 8 to 14 business days |
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