3. HISTORY
• The first supercapacitor based on double
layer mechanism was developed in 1957 by
General Electric using porous electrode.
• Standard Oil Company Cleveland Ohio
rediscovered this effect in 1966 & gave
licensing to NEC in 1978 for market
production.
3
5. Polarized electrode: Highly activated
carbon is used as electrode because of
following reasons:
• It is highly porous
• It has extraordinarily high specific surface
area
• It has good conductivity
• High temperature and chemical stability
• Corrosion resistant
5
6. Electrolyte
It contains dissolved and solvated ions that
migrate to and from the electrodes during
charge and discharge respectively.
Electrolytes are of two types:
• Water soluble
• Water insoluble
6
7. Separator
It acts as mechanical separation between two
electrodes.
It must provide electronic insulation between the
electrode of opposite polarization
It must support ionic conduction
from one electrode to another.
7
14. Applications
• Used in Diesel engine start up in submarines
& tanks.
• Used to recover braking energy in HEV &
modern trains and deliver the same during
accelerating periods.
• Can be used in f &V control in power systems
• Used as backup energy source for GPS guided
missiles
14
15. Flat style of super
capacitor
used for mobile
devices.
Typical knob
capacitor
For PCB mounting
used for memory
backup
Radial style of lithiumIon capacitor for PCB
mounting used for
industrial applications
15
17. References
R.Morrison, ‘’The chemical physics of surfaces’’ New York:
Plenum,1990.
E.J.Dowgiallo & A.F.Bruke ‘’ Ultracapacitors for electric and
hybrid vehicles: A technology update.’’
B.E.Conway, ‘’Electrochemical Supercapacitors’’, chemical
industry press.
IEEE transactions on industry applications, vol. 36.
‘’Transient analysis of pulsed charging in Supercapacitors’’
IEEE documentation.
17
This template can be used as a starter file for presenting training materials in a group setting.SectionsRight-click on a slide to add sections. Sections can help to organize your slides or facilitate collaboration between multiple authors.NotesUse the Notes section for delivery notes or to provide additional details for the audience. View these notes in Presentation View during your presentation. Keep in mind the font size (important for accessibility, visibility, videotaping, and online production)Coordinated colors Pay particular attention to the graphs, charts, and text boxes.Consider that attendees will print in black and white or grayscale. Run a test print to make sure your colors work when printed in pure black and white and grayscale.Graphics, tables, and graphsKeep it simple: If possible, use consistent, non-distracting styles and colors.Label all graphs and tables.
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