Hydrogel-polymer electrolytes for electrochemical capacitors: an overview
IR@CECRI: CSIR-Central Electrochemical Research Institute, Karaikudi
View Archive Info| Field | Value | |
| Title |
Hydrogel-polymer electrolytes for electrochemical capacitors: an overview
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| Creator |
Choudhury, NA.
Sampath, S. Shukla, A.K. |
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| Subject |
Fuel Cells
Electrochemical Power Sources |
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| Description |
Electrochemical capacitors are electrochemical devices with fast and highly reversible charge-storage
and discharge capabilities. The devices are attractive for energy storage particularly in applications
involving high-power requirements. Electrochemical capacitors employ two electrodes and an aqueous
or a non-aqueous electrolyte, either in liquid or solid form; the latter provides the advantages of
compactness, reliability, freedom from leakage of any liquid component and a large operating
potential-window. One of the classes of solid electrolytes used in capacitors is polymer-based and they
generally consist of dry solid-polymer electrolytes or gel-polymer electrolyte or composite-polymer
electrolytes. Dry solid-polymer electrolytes suffer from poor ionic-conductivity values, between 10�8
and 10�7 S cm�1 under ambient conditions, but are safer than gel-polymer electrolytes that exhibit high
conductivity of ca. 10�3 S cm�1 under ambient conditions. The aforesaid polymer-based electrolytes
have the advantages of a wide potential window of ca. 4 V and hence can provide high energy-density.
Gel-polymer electrolytes are generally prepared using organic solvents that are environmentally
malignant. Hence, replacement of organic solvents with water in gel-polymer electrolytes is desirable
which also minimizes the device cost substantially. The water containing gel-polymer electrolytes,
called hydrogel-polymer electrolytes, are, however, limited by a low operating potential-window of
only about 1.23 V. This article reviews salient features of electrochemical capacitors employing
hydrogel-polymer electrolytes.
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| Publisher |
The Royal Society of Chemistry
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| Date |
2009
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cecri.csircentral.net/353/1/049-2009.pdf
Choudhury, NA. and Sampath, S. and Shukla, A.K. (2009) Hydrogel-polymer electrolytes for electrochemical capacitors: an overview. Energy & Environmental Science, 2 (1). pp. 55-67. ISSN 1754-5692 |
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| Relation |
http://cecri.csircentral.net/353/
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