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Aromatic Polyurea for High Temperature High Energy Density Capacitors

  • Yong Wang (a1), Xin Zhou (a2), Minren Lin (a3), Sheng-Guo David Lu (a4), Jun-Hong Lin (a5) and Qiming Zhang (a6)...

Abstract

We investigate aromatic polyureas which can be fabricated in the form of thin films through CVD. It was found that the polymer possesses a flat dielectric response (k∼ 4.2 and loss <1%)) to more than 200°C. The frequency-independent dielectric properties in the investigated frequency range(1kHz∼1MHz), low conductance, low dissipation factor (∼0.005), high breakdown strength (>800MV/m), high energy density (>12J/cm3) and high efficiency suggest this polymer can be a good candidate material for high temperature energy storage capacitors. Breakdown strength was analyzed with Weibull model over a broad temperature range (25°C ∼180°C). Experimental results indicate that aromatic polyurea is more like a nonpolar linear dielectric material because of its highly cross-linked structures. The experiment results further show that this polymer maintains its high performance even at high temperatures.

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Keywords

Aromatic Polyurea for High Temperature High Energy Density Capacitors

  • Yong Wang (a1), Xin Zhou (a2), Minren Lin (a3), Sheng-Guo David Lu (a4), Jun-Hong Lin (a5) and Qiming Zhang (a6)...

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