Electrode materials from hydrous metal and/or hydrous mixed meta

Details Electrode materials from hydrous metal and/or hydrous mixed meta Electrode materials from hydrous metal and/or hydrous mixed meta

1998-09-22

2000-08-01

Kincaid, Kristine

Electricity: electrical systems and devices

Electrolytic systems or devices

Liquid electrolytic capacitor

361502, 361516, 361508, H01G 900, H01G 904, H01G 9042

Patent

active

060975881

ABSTRACT:
An electrode material composed of hydrous metal oxide, such as ruthenium de, is annealed up to temperature just below the temperature at which the hydrous metal oxide would crystallize. Therefore, the hydrous metal oxide remains amorphous or non-crystalline. A hydrous metal oxide material treated in this manner provides a charge storage capacity and energy density greater than 747 F/g and 92 joules/gram, respectively, over 1 V range in a sulfuric acid electrolyte. This invention also provides a method of material preparation, wherein a sol-gel process is used to fabricate the hydrous metal oxides and wherein commercially available hydrous ruthenium oxide powders are treated and annealed.

REFERENCES:
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patent: 4748542 (1988-05-01), Lundsgaard
patent: 5600535 (1997-02-01), Jow et al.
patent: 5851506 (1998-12-01), Zheng et al.
patent: 5875092 (1999-02-01), Jow et al.

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