NDLI: Supercapacitor leakage in energy-harvesting sensor nodes: Fact or fiction?

Content Provider	IEEE Xplore Digital Library
Author	Merrett, G.V. Weddell, A.S.
Copyright Year	2012
Description	Author affiliation: Electronics and Computer Science, University of Southampton, UK, SO17 1BJ (Merrett, G.V.; Weddell, A.S.)
Abstract	As interest in energy-harvesting sensor nodes continues to grow, the use of supercapacitors as energy stores or buffers is gaining popularity. The reasons for their use are numerous, and include their high power density, simple interfacing requirements, simpler measurement of state-of-charge, and a greater number of charging cycles than secondary batteries. However, supercapacitor energy densities are orders of magnitude lower. Furthermore, they have been reported to exhibit significant leakage, and this has been shown to increase exponentially with terminal voltage (and hence stored energy). This observation has resulted in a number of algorithms, designs and methods being proposed for effective operation of supercapacitor-based energy-harvesting sensor nodes. In this paper, it is argued that traditional ‘leakage’ is not as significant as has commonly been suggested. Instead, what is observed as leakage is in fact predominantly due to internal charge redistribution. As a result, it is suggested that different approaches are required in order to effectively utilize supercapacitors in energy-harvesting sensor nodes.
Starting Page	1
Ending Page	5
File Size	1032564
Page Count	5
File Format	PDF
ISBN	9781467317849
e-ISBN	9781467317863
e-ISBN	9781467317856
DOI	10.1109/INSS.2012.6240581
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-06-11
Publisher Place	Belgium
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Supercapacitors Reservoirs Batteries Reliability
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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