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Double-layer capacitors (storage technology) |
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evaluated |
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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.
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Technology field: Regenerative braking and energy management
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General information
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General criteria
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Environmental criteria
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Economic criteria
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Application outside railway sector
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Overall rating
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Overall potential: very promising |
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Time horizon: mid-term |
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Double-layer capacitors are becoming a promising solution for brake energy storage in rail vehicles. Competition mainly comes from fly-wheels which at present still offer certain advantages over capacitors. However capacitor technology has developed quite dynamically in the recent past and has been attributed great future potential by some experts. |
date created: 2002-10-09 |
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© UIC - International Union of Railways 2003 |
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