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Extended life Tantalum Hybrid® Capacitors

From Evans Capacitor Company

Approaches were investigated for extending the operating life of Tantalum Hybrid
faradaic/dielectric capacitors by reducing electrochernical changes that limit life. This
work colic entrates on electrolytic additives designed to eliminate or greatly suppress
hydrogen fonnation that nonnally results from potentiostatic leakage current. Sample
capacitors with electrolytes containing hydrogen limiting reagents were subjected to
accelerated aging conditions. The results are compared to similar tests on standard
capacitors with no electrolyte additives.

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Capacitors
Capacitors are electronic components used for storing charge and energy. In their simplest form, capacitors consist of two conducting plates separated by an insulating material called the dielectric.
Power Capacitors
Power capacitors are used in electrical distribution systems to provide a static source of leading reactive power.
Chip Capacitors
Chip capacitors or surface mount capacitors do not have leads.
Tantalum Capacitors
Tantalum capacitors are used in smaller electronic devices including portable telephones, pagers, personal computers, and automotive electronics. 
Product Announcements
Evans Capacitor Company - HQ1 Series Hybrid® Capacitors
HQ1 series Hybrid Capacitors are ideally suited for Military "Hand Held", or other high capacitance applications. (read more)
Evans Capacitor Company - Hybrid® Capacitors
Hybrid Capacitors are available in hermetic, welded tantalum case (THQ) for -55C to 125C operation, or Polypropylene case (HQ) for hand-held, or applications to 70C. DSCC DWG numbers are also listed... (read more)
Evans Capacitor Company - THQS2 Series
THQS2 series "Shock Hard" Hybrid Capacitors are perfectly suited for Defense and Aerospace applications with high impact shock requirements. (read more)
Evans Capacitor Company - THQA2 and THQM2 Series Hybrid Capacitors
THQA2 series Hybrid Capacitors are perfectly suited for Defense and Aerospace applications requiring high power in a compact, hermetic, tantalum package. (read more)
Evans Capacitor Company - THQ4 Series Hybrid Capacitor
THQ4 series Hybrid Capacitors are perfectly suited for Defense and Aerospace applications requiring high power in a compact, hermetic, tantalum package. (read more)
 
Topics of Interest

Tantalum Hybrid electrolytic/electrochemical capacitors are very versatile components, used in a wide variety of applications. This paper deals with pulse discharge characteristics measurement and...

A tantalum Hybrid capacitor with a thin circular case has been developed. The new button cell, rated l800uF at 50V has a diameter of 23mm, a thickness of 2.5mm, and a weight of 8g. The device will fit...

Mil-style tantalum wet-slug capacitors incorporating Evans hybrid technology have been designed, constructed. and tested. This approach mates an electrochernical capacitor cathode with an electrolytic...

Test data was recently presented for a hybrid electrolytic! electrochemical capacitor having sintered tantalum anodes and Ru02 cathodes. A 50-V, 1 8-mF capacitor of this design had electrical...

High-energy-density capacitors with a tantalum metal anode, Ta205 dielectric, aqueous electrolyte, and Ru02 cathode have been described.1 Known as Evans Ilybriif capacitors, these devices have the...