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This section provides an overview for electric double layer capacitors as well as their applications and principles. Also, please take a look at the list of 10 electric double layer capacitor manufacturers and their company rankings. Here are the top-ranked electric double layer capacitor companies as of July, 2025: 1.Ohmite, 2.KEMET, 3.NIC Components Corp..
Table of Contents
An electric double-layer capacitor is a capacitor that uses the electric double layer formed at the interface between the electrode and the electrolyte to store an electric charge and it is characterized by its exceptionally high energy density.
Because of their high energy density, they are often compared to rechargeable batteries such as nickel-metal hydride batteries and lithium-ion batteries. Still, while batteries involve chemical reactions during charging and discharging, electric double-layer capacitors involve only physical charge adsorption and no chemical reaction.
For this reason, an electric double-layer capacitor is inferior to rechargeable batteries in terms of energy density (the amount of energy stored per unit weight or volume). Still, on the other hand, they have the advantage of output density (the amount of power that can be extracted instantaneously) and extremely low-performance degradation (life span) due to repeated charging and discharging. However, the power density (the amount of instantaneous power that can be extracted) and the performance degradation (life span) due to repeated charging and discharging are parts of the advantages.
Electric double-layer capacitors are used as energy storage devices. While rechargeable batteries are suitable for applications that require a large amount of energy, electric double-layer capacitors are selected for applications that require rapid charging and discharging and where durability is required.
Specifically, they are used in backup power supplies for electronic circuits in mobile devices, printers, copiers, electric toothbrushes, solar-powered watches, etc. They are also used in the robotic power system of the asteroid probe Hayabusa and energy regeneration during the deceleration of automobiles.
The electrolytic double-layer capacitor uses the electric double layer generated at the interface of active materials to make a capacitor. Capacitance C is defined by the formula "C=εS/d." The following measures are necessary from this formula to increase the capacitance C:
The electrolyte is made by dissolving chemical reagents such as quaternary ammonium salts and imidazolium salts in organic solvents. Activated carbon is usually used as an active material for the cathode and anode. To increase the capacitance C, the following measures are necessary:
The capacitors' charging and discharging use an increase in charge at the interface between the electrolyte and electrode so that the positive and negative ions in the electrolyte are paired when they are adsorbed on their respective electrodes. When the stored charge is discharged, the ions are desorbed from the electric double layer. Electric double-layer capacitors can be cylindrical or stacked. The cylindrical type has the advantage of being easy to produce. The positive electrode, negative electrode, and separator are stacked, rolled up, and placed in a cylinder, which is then filled with electrolyte.
Unlike batteries, electric double-layer capacitors do not undergo a chemical reaction during charging and discharging. For this reason, while the capacity of a rechargeable battery decreases significantly from the initial stage after about 1,000 cycles, the performance of electric double-layer capacitors is said, in principle, to be almost unaffected even after 1 million charge-discharge cycles. In reality, however, the capacity of electric double-layer capacitors decreases due to the following factors:
When using electric double-layer capacitors, it is necessary to consider the effect on life expectancy and pay attention to temperature rise and bias of voltage and current when used in series or parallel.
The disadvantages of electric double-layer capacitors are as follows:
Dry-Up
This is caused by the evaporation of the electrolyte from the sealing section of the electric double-layer capacitors to the outside. This disadvantage can be suppressed by using an electrolyte with a high boiling point or by making the sealing section smaller.
Liquid Leakage
Leakage can occur when the butyl rubber used for sealing deteriorates. This can be controlled by reducing the size of the sealing section to prevent moisture, which causes rubber deterioration, from penetrating the inside.
AC Circuit Incompatible
Since this product is intended for secondary electrical use, such as power backup in DC circuits, it cannot be used in AC circuits.
*Including some distributors, etc.
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Tokin America Inc., headquartered in San Jose, California, is a supplier of passive electronic components in North, South, and Central America and is a subsidiary of Tokin Corporation. Its diverse product range includes capacitors, noise countermeasure components, and sensors used in several industries, including telecommunication, automotive electronics, and digital home appliances. The company also provides specialized design support and works with several distributors within the United States, including Future Electronics, WPG Americas, and Bravo Electronics.
Ohmite, established in 1925 and headquartered in Warrenville, Illinois, is a manufacturer of resistive products. Their product offerings incldue wirewound resistors, thick film resistors for high temperature and humidity resistance, and chip resistors for space-constrained applications. Additionally, they provide power resistors designed to handle high currents and voltages, suitable for power supplies and motors. Ohmite's diverse product range also includes custom-designed resistors tailored to meet specific customer requirements. These products find extensive application across various industries, including electronics, automotive, and industrial.
KEMET has a portfolio of over 1,600 patents serving the automotive, aerospace, industrial, telecommunications, computing, consumer, and medical devices. KEMETs devices provide filtering, sensing, energy storage, power conversion, and haptic actuator technology. Among these devices are capacitors, electromagnetic compatibility (EMC) components, resistors, circuit protection devices, inductors, sensors, Piezoelectric devices, release, transformers, and engineering kits.
NIC Components Corp., and Nippon Industries Co. Ltd. have collaborated for over 37 years to design and manufacture passive components, including capacitors, resistors, and magnetics. Established in the USA in 1982, NIC has expanded its business to the custom speciality that meets the demands of today’s emerging and latest technology. Their regional offices can be found in Canada, Malaysia, India, Mexico, China, etc. All of their products are built with more features and are certified with different ISO certifications. They also assist their customers in component selection through live support.
Nippon Chemi-Con Corporation. was established in 1931 and is a manufacturer of aluminum-based products, precision mechanical components, and electronics equipment based in Shinagawa, Tokyo, Japan. The company's product portofolio offers various products such as aluminum electrolytic capacitors, multilayer ceramic capacitors, inductors, camera module, and silicon wafer. The products have been used in various application such as electric power steering, direct injection engine control, solar power inverter, switching power supply, and automotive micro computer power supply. The company has passed the ISO 9001, IATF 16949, and ISO 14001 standards certification. The products are manufactured under the compliance of RoHS and REACH/SVHC standards.
Panasonic Industry Europe is the European branch of Panasonic, a global manufacturer of electronics and houseware, originally founded in 1918. Panasonic Industry Europe manufactures in 4 categories: components, devices, energy & building, and automation devices & solutions. Components include relays, capacitors, resistors, sensors, switches, connectors, couplers. Devices include wireless connectivity, e-bike systems, motors, compressors, thermal solutions, GPS antennas, as well as electronic materials. Energy & building includes batteries, fuel cells, solar sells, power tools, and home IoT. Automation devices & solutions include sensors for factory automation, industrial motors, laser welding, and more.
NICHICON, founded in Kyoto, Japan, in 1950, is a manufacturer of electronic components such as Aluminum electrolytic capacitors and Plastic film capacitors. The company's product portfolio includes Small Li-Ion Rechargeable Batteries, Household energy storage systems, Public and industrial power storage systems, Switching power supplies, and Power sources for medical accelerators. The company serves industries such as Oil and Gas, Aerospace and Defense, Automotive and Transportation, Construction, and Power Generation. NICHICON also offers various services, including product selection, installation, preventative maintenance, troubleshooting, and repair.
Ioxus established in Oneonta, NY in 12007, is a manufacturer engaged in CAP ultracapacitors, iMOD modules, and THiNCAP products are optimized for higher power density, and voltage levels that provide simple solutions to incorporate products easily. The company acquired Power Systems Co., in 2012 and their products are used for or used in a range of applications, UPS, wind turbines, industrial and automotive. Their product range include both prismatic pouch cells, and THiNPAC lines, as well as cylindrical iCAP and iMOD lines. IOXUS offers Ultracapacitors with chemistries using Acetonitrile (ACN) and Propylene Carbonate (PC).
Seiko Inn Sur was established in 1937 and headquartered in Chiba-shi, Japan is a manufacturer of electronic components, mechanical precision parts and printing devices. The company boasts an extensive and diversified product portfolio including miniature ball bearings, thermal printers, superior performance Co-Ni alloy products, and rare earth magnets among others. These products span a wide spectrum of industries and sectors including commercial printing companies, healthcare facilities, automotive, household appliances, and in the production of musical instrument accessories.
Ranking as of July 2025
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | Ohmite |
19.8%
|
| 2 | KEMET |
14.1%
|
| 3 | NIC Components Corp. |
13.0%
|
| 4 | Nippon Chemi-Con Corporation. |
10.9%
|
| 5 | Ioxus |
9.4%
|
| 6 | Tokin America, Inc |
8.9%
|
| 7 | NICHICON |
8.3%
|
| 8 | Seiko Inn Sur |
6.3%
|
| 9 | Europe Chemi-Con |
4.7%
|
| 10 | Panasonic Industry Europe GmbH |
4.7%
|
Derivation Method
The ranking is calculated based on the click share within the electric double layer capacitor page as of July 2025. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
United States of America
|
4 | 50.0% |
|
Japan
|
2 | 25.0% |
|
Germany
|
2 | 25.0% |
38 products found
38 products
Shinko Shoji Co., Ltd.
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■Features ・The SCM series achieves high withstand voltage (5.0V to 9.0V) by internally connecting electric double layer capacitors in series and c...
Identity Co., Ltd.
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■Features ・Super capacitor ・Smart cable ・Equipped with liquid crystal display ・LED light function ・Various protection functions ・Overwhelming...
Nippon Chemi-Con Corporation.
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High voltage and long life series with 2.7V withstand voltage and 2,000 hours guarantee (2.7V 65℃ or 2.5V 70℃). Compared to general 2.5V withstand ...
Nippon Chemi-Con Corporation.
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Comes with outer sleeve (gold color). It has low resistance and excellent temperature characteristics, making it suitable for automotive backup pow...
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Nippon Chemi-Con Corporation.
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Nippon Chemi-Con Corporation.
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Nippon Chemi-Con Corporation.
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Nippon Chemi-Con Corporation.
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Equipped with two electric double layer capacitors, it can be fixed to the board with a snap fit. Since small components can be mounted in the spac...
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We have prepared a module (lead product) for you to easily try out the electric double layer capacitor DLCAP™.
Keisei Co., Ltd.
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■Features ・Wide operating temperature range: -25℃ to +70℃ ・No need for periodic replacement ・Maximum working voltage 5.5VDC or 11.0VDC ・High re...
Kyocera Corporation
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AVX's electric double layer capacitor (supercapacitor) lineup, consisting of the SCC series, SCM series, and PrizmaCap, has the ability to supply s...
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Würth Elektronik
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■Standard cylindrical size product series ・Electric double layer capacitor ・Higher energy density than normal capacitors ■Application ・Memory b...
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We have prepared a module so that you can easily try out electric double layer capacitors.
WIN SOURCE ELECTRONICS
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■Summary Electric double layer capacitors (EDLCs), also commonly referred to as supercapacitors, have very high capacitance and energy storage capa...
Panasonic Industry Co., Ltd.
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■Product overview ・Achieve optimal solutions by combining EDLC design technology with a proven track record for in-vehicle use and in-vehicle modu...
