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This section provides an overview for lithium-ion capacitors as well as their applications and principles. Also, please take a look at the list of 12 lithium-ion capacitor manufacturers and their company rankings. Here are the top-ranked lithium-ion capacitor companies as of February, 2025: 1.SPEL TECHNOLOGIES PRIVATE LIMITED, 2.NAC Semi, 3.Seika Machinery, Inc.
Table of Contents
A lithium ion capacitor is an energy storage device that combines the properties of an electric double-layer capacitor and a lithium ion battery.
It is abbreviated as "LiC" because it is written as "lithium-ion capacitor" to distinguish it from LiB, which is a lithium-ion battery.
Compared to the electric double layer capacitor (EDLC), the LIC has a higher energy density and a larger power density than the LIB. Due to these differences in characteristics, there are different types of lithium-ion capacitors for different applications.
A Lithium-Ion Capacitor is an energy storage material with high energy density and output density, as well as excellent safety and durability. They are expected to replace lithium-ion batteries in fields requiring high output, which lithium-ion batteries are not good at. It can also be used in situations requiring energy density, in which electric double-layer capacitors are not good at, and in applications where high temperature and high voltage loads are applied.
It features excellent rapid charge/discharge characteristics, high- temperature characteristics, durability, and reliability, and can be handled safely. Because they can be used stably for a long time, even after repeated charging and discharging, they are being considered for a wide range of applications, including solar power generation, wind power generation, instantaneous voltage drop compensation devices, industrial machinery, and transportation and vehicle-related applications.
Lithium-Ion Capacitor have also been considered for use as a power source for electric vehicles, but their energy density is lower than that of lithium-ion batteries and they are inferior in terms of cruising range, so lithium-ion batteries are mostly used for electric vehicle applications. However, compared to lithium-ion batteries, lithium-ion capacitors are superior in terms of rapid charging and discharging, so they are being considered for use in vehicles with a fixed route, such as trams and buses, where they are charged at stops and stations to store power for the journey.
A Lithium-Ion Capacitor consists of a cell, cathode, anode, and electrolyte, and can be charged and discharged repeatedly by adsorption and desorption of lithium ions in the electrolyte to the cathode and anode. When voltage is applied to a Lithium-Ion Capacitor, lithium ions are adsorbed on the negative electrode and anions are physically adsorbed on the positive electrode.
When discharged from this state, the lithium ions on the negative electrode are desorbed and lithium ions are adsorbed on the positive electrode after the anions are desorbed. With charging and discharging, the positive electrode uses physical adsorption and desorption as in an electric double layer capacitor, while the negative electrode uses adsorption and desorption of lithium ions, involving a chemical reaction as in a lithium-ion secondary battery.
Lithium-Ion Capacitors require a higher cell voltage to increase energy density. This is because the amount of energy stored is expressed as E = CV2/2 (C: capacitance, V: cell voltage). The voltage is the potential difference between the positive and negative electrode potentials, but raising the positive electrode potential causes oxidative degradation of the material, so in Lithium-Ion Capacitor, the negative electrode is doped with lithium in advance at the manufacturing stage to lower the negative electrode potential so that the potential difference increases during charging.
A capacitor is a capacitor, which mainly consists of a cell, a positive electrode, a negative electrode, an electrolyte, and a separator. Lithium-Ion Capacitor uses activated carbon as the active material of the positive electrode, and the active material of the negative electrode has a small specific surface area, similar to that of a lithium-ion battery.
Carbon materials such as hard carbon, which can be doped with lithium ions, are used. Aluminum is used for the positive electrode and copper for the negative electrode current collectors, but they are porous because they must allow lithium ions to permeate through them for lithium doping in the manufacturing process described below.
As electrolyte, organic electrolyte made by dissolving lithium salts such as LiBF4 (lithium tetrafluoroborate) and LiPF6 (lithium hexafluorophosphate) in organic solvents is usually used. Separators with excellent lithium ion permeability and electrolyte impregnation properties are used.
*Including some distributors, etc.
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VINAtech Co., Ltd, established in 1999, in Seoul, South Korea, is a manufacturer of supercell capacitors, and single cell capacitors for electrochemical storage, RF solutions and integrated circuits. The company manufactures supercapacitors including energy efficient Hybrid Supercapacitor and Lithium Hybrid capacitor. They also produce Fuel cell materials such as Catalyst support, Pt/C Catalyst, and Membrane Electrode Assembly(MEA) comprehensively improvising efficient Carbon technology for environment sustainability. These are used in many industries ranging from infrastructure building for Smart city to consumer electronics, automotive and renewable energy applications for fast charging, higher energy storage and longer performance lives.
JTEKT was born from the merger of bearing maker Koyo Seiko and machine tool maker Toyoda Machine Works. JTEKT focuses on environmental sustainability to create automotive-specific components as well as industry-agnostic components including sensors, gears, displays, storage devices, and hydraulic units. JTEKT also creates and designs machine tools and equipment necessary for machine production. JTEKT is also developing "internet of everything" (IoE) solutions for modern industry.
TAIYO YUDEN CO., LTD. was founded in 1950 and is headquartered in Kyobashi, Chuo-ku, Tokyo is a manufacturer of electronic components. The company offers a diverse product catalog including conductive polymer hybrid aluminum electrolytic capacitors, noise suppression components, and multilayer ceramic capacitors. These products have applications in telecommunication, automotive, and medical equipment. In 2023, the company announced that it had started mass production of three items in two sizes, including the multilayer metal power inductor.
Electro Standards Laboratories is a designer and manufacturer of electronic data acquisition and communication products that was established in 1976 in Cranston, Rhode Island, USA. The company’s product lineup includes linear variable differential transformers (LVDTs), load cells, and strain gages for collecting and processing data from sensors. It also offers network converters and switches for enabling and protecting data transmissions over fiber optic networks. The company’s products are used mainly by clients in the defense, telecommunication, and public utilities sectors.
Seika Machinery, Inc, founded in Torrance, California, in 1993 is a manufacturer of Lithium-Ion Capacitors The company's product portfolio includes High-Energy Capacitors, High-Power Capacitors, Hybrid Capacitor Modules, Prismatic CEll Modules and custom-made capacitors. The company serves industries such as Oil and Gas, Aerospace and Defense, Automotive and Transportation, Construction, and Power Generation. Seika Machinery, Inc. (SMI) is a subsidiary of Seika Corporation in Japan which is a general trading company and has global distribution and customer support.
Ranking as of February 2025
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | SPEL TECHNOLOGIES PRIVATE LIMITED |
32.3%
|
| 2 | NAC Semi |
10.8%
|
| 3 | Seika Machinery, Inc |
10.0%
|
| 4 | TAIYO YUDEN CO., LTD. |
9.8%
|
| 5 | JTEKT Corporation |
8.8%
|
| 6 | VINATech Co.,Ltd |
6.7%
|
| 7 | Electro Standards Laboratories |
6.1%
|
| 8 | LICAP Technologies, Inc. |
5.7%
|
| 9 | Shanghai Jinpei Electronics Co.,Ltd |
5.5%
|
| 10 | YUNASKO LTD |
3.7%
|
Derivation Method
The ranking is calculated based on the click share within the lithium-ion capacitor page as of February 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 (%) |
|---|---|---|
|
Japan
|
3 | 60.0% |
|
United States of America
|
1 | 20.0% |
|
Republic of Korea
|
1 | 20.0% |
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