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Issue 10, 2011
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Polarizable energy-storage membrane based on ionic condensation and decondensation

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Abstract

Electrical energy storage and management is an urgent issue due to climate change and energy shortage. Dielectric and double-layer capacitors are the two basic energy-storage devices currently available. However, the application of the dielectric capacitor is very limited due to its low capacitance, while the double-layer capacitor suffers from difficult scaling-up and high fabrication cost, even though its capacitance is high. In this work, we present the first energy-storage membrane which stores charge when simply sandwiched between two metal plates. With an ionic conductivity of 2.8 × 10−4 S cm−1, the membrane is highly polarizable, and its energy-storage mechanism is based on the condensation–decondensation of mobile cations in the membrane negative matrix. The capacitance of a 1.0 cm2 area membrane is 0.2 F cm−2, and it can be readily scaled up simply by using larger membrane pieces. In view of its extreme simplicity, excellent scalability and practical viability, the novel game-changing membrane reported here may provide a sustainable solution to energy storage.

Graphical abstract: Polarizable energy-storage membrane based on ionic condensation and decondensation

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Publication details

The article was received on 28 May 2011, accepted on 28 Jul 2011 and first published on 18 Aug 2011


Article type: Communication
DOI: 10.1039/C1EE01841H
Citation: Energy Environ. Sci., 2011,4, 3960-3965
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    Polarizable energy-storage membrane based on ionic condensation and decondensation

    X. N. Xie, K. K. Lee, J. Wang and K. P. Loh, Energy Environ. Sci., 2011, 4, 3960
    DOI: 10.1039/C1EE01841H

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