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The Electric Double Layer Capacitors developed by Suntan are storage capacitors with highest capacitance values in the Farad range. They are among others suited to serve as batteries, can deliver considerably higher currents for a short time, however, and are maintenance free.

The construction of a Double Layer Capacitor can be described as a plate capacitor where the most important topic is to obtain electrodes with an extremely large surface. For this purpose activated carbon is ideally suited, as it allows to obtain capacitance values of up to 100F/g of the active mass of the electrode.

The electrolyte, the conductive liquid between the electrodes, is a conducting salt dissolved in an aqueous or organic solvent which permits to apply voltages of 2 V (in special cases 3 V).

The actual double layer consists from ions which attach to the electrodes - negative ions to the positive electrode and positive ions to the negative electrode - as soon as a voltage is applied to the cell and thus create a dielectric of a few Angstrom only. According to the formula for the capacitor from the dielectric constant of the double layer (approx. 10) and the extremely thin dielectric you get an very high capacitance value.

Long life, with little degradation over hundreds of thousands of charge cycles. Due to the capacitor's high number of charge-discharge cycles (millions or more compared to 200 to 1000 for most commercially available rechargeable batteries) it will last for the entire lifetime of most devices, which makes the device environmentally friendly. Rechargeable batteries wear out typically over a few years, and their highly reactive chemical electrolytes present a disposal and safety hazard. Battery lifetime can be optimised by only charging under favorable conditions, at an ideal rate and, for some chemistries, as infrequently as possible. Electric Double Layer Capacitor can help in conjunction with batteries by acting as a charge conditioner, storing energy from other sources for load balancing purposes and then using any excess energy to charge the batteries at a suitable time.
Low cost per cycle
Good reversibility
Very high rates of charge and discharge.
Extremely low internal resistance (ESR) and consequent high cycle efficiency (95% or more) and extremely low heating levels
High output power
High specific power. According to ITS (Institute of Transportation Studies, Davis, California) test results, the specific power of electric double-layer capacitors can exceed 6 kW/kg at 95% efficiency
Improved safety, no corrosive electrolyte and low toxicity of materials.
Simple charge methods—no full-charge detection is needed; no danger of overcharging.

Electric Double Layer Capacitor do not have a conventional dielectric. Rather than two separate plates separated by an intervening substance, these capacitors use "plates" that are in fact two layers of the same substrate, and their electrical properties, the so-called "electrical double layer", result in the effective separation of charge despite the vanishingly thin (on the order of nanometers) physical separation of the layers. The lack of need for a bulky layer of dielectric permits the packing of plates with much larger surface area into a given size, resulting in high capacitances in practical-sized packages.

In an electrical double layer, each layer by itself is quite conductive, but the physics at the interface where the layers are effectively in contact means that no significant current can flow between the layers. However, the double layer can withstand only a low voltage, which means that electric double-layer capacitors rated for higher voltages must be made of matched series-connected individual Electric Double Layer Capacitor, much like series-connected cells in higher-voltage batteries.

Electric Double Layer Capacitor have much higher power density than batteries. Power density combines the energy density with the speed that the energy can be delivered to the load. Batteries, which are based on the movement of charge carriers in a liquid electrolyte, have relatively slow charge and discharge times. Capacitors, on the other hand, can be charged or discharged at a rate that is typically limited by current heating of the electrodes. So while existing Electric Double Layer Capacitor have energy densities that are perhaps 1/10th that of a conventional battery, their power density is generally 10 to 100 times as great (see diagram, right).

An electric double-layer capacitor, also known as supercapacitor, supercondenser, pseudocapacitor, electrochemical double layer capacitor (EDLC), or ultracapacitor, is an electrochemical capacitor with relatively high energy density, typically on the order of thousands of times greater than an electrolytic capacitor. For instance, a typical D-cell sized electrolytic capacitor displays capacitance in the range of tens of millifarads. The same size electric double-layer capacitor might reach several farads, an improvement of two orders of magnitude. Supercapacitors usually yield a lower working voltage. as of 2010 larger double-layer capacitors have capacities up to 5,000 farads. Also in 2010, the highest available supercapacitor energy density is 30 Wh/kg, (although 85 Wh/kg has been achieved at room temperature in the lab ) lower than rapid-charging lithium-titanate batteries.

Suntan is a Hong Kong based manufacturer of Gold Capacitors. Including Low Leakage Double Layer Capacitor, Stacked Coin Gold Capacitor and Serial Struction Gold Capacitor etc.

Electric Double-Layer Capacitor is Small-size, large capacity, excellent voltage holding. For all ratings, uniform 5 mm pitch of terminal spacing. Wider temperature range(-25~+70℃) thank battery makes periodic change unnecessary.13.5x7.5 size can encase up to 0.33F. Ideal for backing up of CMOS's, microcomputers, RAM's and the like used in VCR's, tuners, TV sets, telephone sets and other.

1.Small-size, large capacity, excellent voltage holding.
2.Unlike battery, unlimited charge/discharge cycle.
3.Wider temperature range.
4.Ideal for backing up of CMO's.microcomputers, RAM's and also used in VCR's tuners, TV sets, telephone sets and other.
5.Serial structure, two cell with same characteristics.
6.Low ESR, high energy density.
7.The capacity range is from 0.1F-3000F, and the operating voltage of capacitors range from 2.5V-5.5V.

Electric Double Layer Capacitor is supplied by Suntan Technology Company Limited, in website www.suntan.com.hk there is a full products list of Gold Capacitors and other electrical products.

Gold capacitor 5.5V 1.0 F super capacitor, gold capacitor, ultra capacitor , Electric Double-layer capacitor ,EDLC ,Farad capacitor , super capacitor which have some performance : unlimited charge or discharge cycle ,Small-size, large capacity, excellent voltage holding. Wider temperature range from -25 to70 ,Low ESR ,high energy density. Which nominal capacity range is 0.1F-3000F.operating voltage range is from 2.5V to 5.5V. It used in many fields , Toys, Medical equipment, Bicycle Light, Flashlights, UPS, GPS storing power for Video,Audio,CMOS,RAM,VCR,scanner,Telephone,Computer,LED,Relay,Wireless ,Consumption Electronics, Buzzer

Concerning on TS12S-S (Electric Double Layer Capacitor - Stacked Coin (Small Capacitance)(under develop), miniature size, low leakage, safety and high reliability, the rated capacity is from 0.15F to 8.0F at 2.7~ 5.5V voltage. There are V & H type to be chosen.

Suntan Technology Company Limited
----All Kinds of Capacitors

Electric Double Layered Capacitors , know as “Gold Capacitor”, offer the highest volumetric efficiency of all capacitor technologies. It is often compared to a secondary battery. Unlike batteries, the Gold Capacitor does not rely on a chemical reaction to produce electric current rather it is a storage cell that utilizes the absorption/release reaction of ions.

Compared to other capacitors and batteries,Gold Capacitors are very new. We have summarized the characteristics and reliability of Gold Capacitors in this manual. Suntan has developed the Gold Capacitor to meet your design needs. We hope you will find this manual informative and useful. Any requirements please visit www.suntan.com.hk.