Eggshells for Electronics: Portable Supercapacitors
Lisa Smith
Electrical double-layer capacitors (EDLCs) are the most common type of supercapacitors used in portable electronic devices. As demand for such devices continues to rise, the search is on for ever cheaper yet more efficient EDLC materials. It is desirable that a candidate material should have both high power and energy densities, which are affected by the material’s specific capacitance and resistance.
The first patented EDLC was made of porous carbon, which meets all the requirements for the...