ACTE UK > Technologies > Supercapacitors




Supercapacitors are an essential enabling technology in space-constrained and handheld electronic devices, supporting (or potentially replacing) batteries, renewable energy sources and many other, current-limited or fluctuating power supplies.

They are especially useful in wireless applications and wireless sensor networks where pulsed energy demand may exceed the supply capability, or the useful working life of primary cells is severely limited compared with an averaged-out current-drain profile.

With Supercapacitors, designers can create smaller, lighter, more functional and longer-running products, with more power, more security and fewer components.




ACTE supports and distributes the CAP-XX range of thin, prismatic supercapacitors with best-in-class power and energy density.

A complete overview of Cap-XX products and their characteristics can be found in the Product Guide and Notes document (left). This also has extensive notes on the handling, and design requirements.

Further technical and application specific information and presentations are available within the Knowledge Base section


Cap-XX Supercapacitor Technology

Nanotechnology Construction

CAP-XX has been recognised for its breakthrough nanotechnology process for producing high capacitance (1 farad or more), low equivalent series resistance (< 100 milli-ohms) supercapacitors that deliver the highest energy and power densities in a thin, flat, prismatic package suitable for portable electronics devices.


The company's supercapacitor construction uses carbon electrodes on aluminium foil with a porous separator between the two electrodes arranged in multiple flat layers connected in parallel. The aluminium foil moves the charge current into and out of the carbon where the actual charge is stored in the supercapacitor.

CAP-XX has used nanotechnology:

  • To optimize the capacitance per unit volume of carbon by increasing the surface area.
  • To lower the resistance of the carbon/aluminium boundary.

These optimizations along with the unique construction using multiple flat layers result in industry-leading energy density.

The electron microscope photograph to the right shows the CAP-XX carbon electrodes and the supercapacitors' nanostructure and construction which optimizes the capacitance and ESR. The result is the industry's highest energy and power densities that can be packed into a thin, flat prismatic package to meet the pulse-power requirements of portable electronic devices. These prismatic supercapacitors allow designers to produce thinner, longer-running products such as cell phones, PDAs, medical devices, AMRs, and notebooks.



Supercapacitor Applicatins - Energy Harvetsing

Supercapacitors are the preferred solution for energy havesting applications. Typically, energy harvesting brings to mind small-scale solar (PV) applications or maybe vibrational which is increasingly being implmented. However the same techniques are used in many IoT applications where the energy source cannot provide the instantaneous power to drive RF transceivers or valves and solenoids. In this broad spectrum of applications energy is gradually harvested from small low-power primary source and consumed in high-power, short-bursts as the application dictates.

Cap-xx applications brochure introduces these applications and the new thin form-factor devices required in the very compact sized applications.