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   Double-layer capacitors (storage technology)  evaluated  
Double-layer capacitors (also termed "supercapacitors" or "ultracapacitors") store energy in the electric field of an electrochemical double-layer. The use of high surface-area electrodes results in an extremely large capacitance. The power and energy densities make capacitors an option for brake energy storage in rail vehicles.
Technology field: Regenerative braking and energy management
open main section General information
open main section General criteria
open main section Environmental criteria
open main section Economic criteria
open main section Application outside railway sector
open main section Overall rating
References / Links:  Avart, Chabas 2001;  Caputo 2000;  Charvet 2001;  Hennig, Stephanblome 2000;  Kötz, Carlen 2000;  Schneuwly et al. 2002
Related projects:  Studies performed on energy storage systems;  THALES: hybrid tram train with on-board ultracapacitors
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 date created: 2002-10-09
© UIC - International Union of Railways 2003
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