Suwon, Kyonggi-Do, Korea - Ness Corp. says its proprietary 2.3-volt ultracapacitors, ranging from 10 to 3,500 farads, can make next-generation portable and handheld devices smaller, lighter and more efficient. High energy density is made possible by a proprietary electrode and electrode-manufacturing process. The result is a family of products with a higher capacitance and significantly lower equivalent-series resistance than other ultracapacitors, Ness said.
The 2,500-F, 2.3-V unit has energy densities of 2.83 watt-hours/kg and 3.74 Wh/liter, and power densities of 5.1 kW/kg and 6.7 kW/liter, with an almost unlimited number of charges and discharges-more than 100,000 cycles, Ness said.
The company uses an activated-carbon powder in the electrode-coating process, which is said to allow easy manipulation of the thickness and width of the coated layer and to permit production of electrodes of varying shapes and capacitance at a low cost.
In lots of 100, pricing is $5 per unit for a 10-F capacitor, $15 for a 60-F capacitor and $230 for a 2,500-F capacitor.