Ferroelectric polymer networks with high energy density and improved discharged efficiency for dielectric energy storage

Paisan Khanchaitit, Kuo Han, Matthew R. Gadinski, Qi Li and Qing Wang ()
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Paisan Khanchaitit: The Pennsylvania State University, University Park
Kuo Han: The Pennsylvania State University, University Park
Matthew R. Gadinski: The Pennsylvania State University, University Park
Qi Li: The Pennsylvania State University, University Park
Qing Wang: The Pennsylvania State University, University Park

Nature Communications, 2013, vol. 4, issue 1, 1-7

Abstract: Abstract Ferroelectric polymers are being actively explored as dielectric materials for electrical energy storage applications. However, their high dielectric constants and outstanding energy densities are accompanied by large dielectric loss due to ferroelectric hysteresis and electrical conduction, resulting in poor charge–discharge efficiencies under high electric fields. To address this long-standing problem, here we report the ferroelectric polymer networks exhibiting significantly reduced dielectric loss, superior polarization and greatly improved breakdown strength and reliability, while maintaining their fast discharge capability at a rate of microseconds. These concurrent improvements lead to unprecedented charge–discharge efficiencies and large values of the discharged energy density and also enable the operation of the ferroelectric polymers at elevated temperatures, which clearly outperforms the melt-extruded ferroelectric polymer films that represents the state of the art in dielectric polymers. The simplicity and scalability of the described method further suggest their potential for high energy density capacitors.

Date: 2013
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DOI: 10.1038/ncomms3845

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