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Strontium Ruthenate Perovskites with High Specific Capacitance for use in Electrochemical Capacitors

Published online by Cambridge University Press:  10 February 2011

P. M. Wilde
Affiliation:
ZSW Center for Solar Energy and Hydrogen Research Baden-Wuerttemberg, Division 3: Energy Storage and Conversion, Helmholtzstrasse 8, 89081 Ulm, Germany
T. J. Guther
Affiliation:
ZSW Center for Solar Energy and Hydrogen Research Baden-Wuerttemberg, Division 3: Energy Storage and Conversion, Helmholtzstrasse 8, 89081 Ulm, Germany
R. Oesten
Affiliation:
ZSW Center for Solar Energy and Hydrogen Research Baden-Wuerttemberg, Division 3: Energy Storage and Conversion, Helmholtzstrasse 8, 89081 Ulm, Germany
J. Garche
Affiliation:
ZSW Center for Solar Energy and Hydrogen Research Baden-Wuerttemberg, Division 3: Energy Storage and Conversion, Helmholtzstrasse 8, 89081 Ulm, Germany
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Abstract

Strontium ruthenates with the perovskite type structure ABO3 have been shown to exhibit attractive capacitive properties. Doping on the A site with La lead to typical capacitance values of 21 F/g. These materials were synthesized by coprecipitating metal hydroxides from a stoichiometric salt solution and subsequent firing at 800 °C in air. In this paper we present a new procedure to synthesize the materials which are crystalline and nevertheless show appreciable capacitances in contrast to ruthenium dioxide material, which only works in a hydrated amorphous structure. The process basically consists in a pyrolysis of concentrated metal salt solutions of the respective chlorides and nitrates at 500 °C for several minutes. Excess soluble phases are removed by washing out with water. X-ray diffraction experiments revealed similar phase purity and crystallinity as known from the coprecipitated materials. However the measured capacitances of undoped perovskites reached high values of 200 F/g exceeding twenty times the value of respective coprecipitated materials. First experiments on doping the materials promise further progress. The new synthesis route introduces a higher surface area by leaving cavities from leached soluble phases and bulk defects into the crystal structure. The first effect increases the number of active sites in contact with the electrolyte while the latter enhances the protonie conduction which is necessary to keep the charge balance within the material during cycling.

Type
Research Article
Copyright
Copyright © Materials Research Society 1998

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References

REFERENCES

[1] Zheng, J.P., Cygan, P.J., Jow, T.R., J. Electrochem. Soc., 142 (1995) 2699.10.1149/1.2050077Google Scholar
[2] Kurzweil, P., Schmid, O., Proceedings of the 6th International Seminar on Double Layer Capacitors and Ssimilar Energy Storage Devices, Deerfield Beach, Fl, (1996)Google Scholar
[3] Cook, RT.L., Sammells, A.F., Solid State Ionics, 45 (1991) 311.10.1016/0167-2738(91)90167-AGoogle Scholar
[4] Kreuer, K.-D., Fuchs, A., Maier, J., Solid State Ionics, 77 (1995) 157.10.1016/0167-2738(94)00265-TGoogle Scholar
[5] Galasso, F.S.: Perovskites and High Tc Superconductors, Gordon and Breach, New York (1990).Google Scholar
[6] Oesten, R., Guther, T., Garche, J., Proceedings of the 6th International Seminar on Double Layer Capacitors and Similar Energy Storage Devices, Deerfield Beach (1996).Google Scholar
[7] Guther, T. J., Oesten, R., Garche, J., in Electrochemical Capacitors II, Delnick, F.M., Ingersoll, D., Andrieu, X. and Naoi, K., editors, PV 96–5, p. 16, the Electrochemical Society Proceeding Series, Pennington, NJ (1997).Google Scholar
[8] Wilde, P.M., Guther, T.J., Oesten, R., Garche, J., paper # 253 presented at the Joint International Meeting of the Electrochemical Society and the International Society of Electrochemistry, Paris, (1997).Google Scholar
[9] Trasatti, S.: “Physical Electrochemistry of Ceramic Oxides”, Electrochimica Acta, 36–2 (1991)225.10.1016/0013-4686(91)85244-2Google Scholar
[10] Singh, S.P., Singh, R.N., PoiUearat, G., Chartier, P., Int. J. Hydr. Energy, 20–3 (1995) 203.10.1016/0360-3199(94)E0027-VGoogle Scholar
[11] Oesten, R., Huggins, R.A., Ionics 1, 427 (1995).10.1007/BF02375287Google Scholar
[12] Marinzic, N., Proceedings of the 6th International Seminar on Double Layer Capacitors and Similar Energy Storage Devices, Deerfield Beach (1996).Google Scholar