Characterization of tantalum oxide-ruthenium oxide hybrid capacitors
Tzu-Yen Chang; Xu Wang; Evans, D.A.; Roberson, S.L.; Zheng, J.P.
Industrial Electronics, IEEE Transactions on
Volume 51, Issue 6, Dec. 2004 Page(s): 1313 - 1317
Digital Object Identifier   10.1109/TIE.2004.837900
Summary:The ac and dc performance and leakage current of Evans tantalum oxide-ruthenium oxide hybrid capacitors were characterized at room temperature. The RC time constants were in the range from 2 to 0.45 ms and dependent on the maximum operational voltage of the capacitor. The gravimetric and volumetric energy densities of hybrid capacitors were in the range of 0.074-0.233 J/g and 0.388-1.384 J/cm³, respectively. The gravimetric and volumetric power densities of hybrid capacitors were in the range of 19-259 W/g and 100-1540 W/cm³, respectively. A comparison of the performance between hybrid capacitors to conventional aluminum and tantalum electrolytic capacitors is made in this paper.

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