Tantalum ruthenium mixing type electrolytic capacitor and preparation method thereof

Abstract

The invention discloses a tantalum ruthenium blending electrolytic capacitor applied for high power and a process for preparation belonging to the electrolytic capacitor preparing technical field. The structure of the blending capacitor comprises a barred, slice and slice series capacitor structure and sintering tantalum anode. The electrolytic solution and the ruthenium oxide cathode are sealed in the tantalum housing to form the tantalum ruthenium blending electrolytic capacitor which are both equipped with the characteristics of tantalum electrolytic capacitor and ruthenium oxide super capacitor. The sintering anode utilizes high specific volume tantalum powder as raw material and prepares for slice anode after process flows of weighing, forming, sintering, energizing and the like. The ruthenium oxide cathode utilizes titanium metal as electrode basal body, ruthenium chloride, and iridium chloride and tetrabutyl titanate as reacting precursors, employs oxygenizing and sintering treatment with 380 DEG C to obtain metal oxide-coated cathode, the ruthenium oxide cathode surface prepares resin micro-projecting dot matrix to replace traditional membrane. The invention is expected to have wide application in various fields of electronics, cars, astronavigation, military and the like.

Description

technical field [0001] The invention belongs to the technical scope of preparation of electrolytic capacitors, in particular to a tantalum-ruthenium hybrid electrolytic capacitor applied to high power and a preparation method thereof. Background technique [0002] Tantalum electrolytic capacitors are actually composed of two capacitors in series, the anode and the cathode, which are connected together through the electrolyte, and their total capacity C T It can be expressed as follows: [0003] 1 / C T =1 / C A +1 / C C [0004] In the formula: C A is the anode capacity; C C is the cathode capacity. From this formula, it can be seen that C T than C A or C C Small. After electrochemical oxidation treatment, a layer of Ta 2 o 5 Dielectric material. Dielectric materials of different thicknesses can withstand different values ​​of cell working voltage, which is why the single voltage of tantalum electrolytic capacitors can reach hundreds of volts. Supercapacitors rely on...

AI Technical Summary

Problems solved by technology

However, supercapacitors do not contain dielectric substances, and the voltage of a capacitor cell is limited by the decomposition voltage of the electrolyte. For example, for aqueous liquid electrolytes, the cell voltage is only 1V

In order to make it work under high voltage, it is necessary to increase the number of series-connected units, but this will inevitably lead to an increase in the internal resistance of the system, an increase in volume and weight, and a decrease in total capacity. In addition, the increase in cost is also what we want Issues that must be paid attention to

Therefore, the application of supercapacitors to pulse power supplies is subject to certain restrictions.

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