| Feb.10,2005 |
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| Teijin Develops Ultra-Thin Electric Double Layer Capacitor Mounts Readily on Range of Mobile Devices |
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| Teijin Limited | |
Teijin Limited is pleased to announce the successful development of a new carbon electrode material with considerably reduced internal electric resistance, which has enabled the Company to produce an electric double layer capacitor (EDLC) of unprecedented compactness and extremely low profile design. The capacitor takes advantage of characteristics that enable a large current to be transiently drawn from a small electrode area.
Teijin will make a major initiative to cultivate a market for this new capacitor, and will seek to expand applications by leveraging its small dimensions and very low profile design, which means that it can be readily mounted in limited space of mobile devices.
Details are provided below.
1.Background to the Development<
| (1) |
Cellular phone handsets and many other mobile devices increasingly have new features that respond to the ever-growing demands for applications, such as image capture, send and receive functions, non-contact communication functions and compact hard disk drives. |
| (2) |
These new features raise the power consumption of mobile devices and require a large transient current on the order of amperes when power consumption peaks. This is in turn demanding that batteries for mobile devices have greater capacity (longer operation) and higher output (to satisfy transient power requirements). |
| (3) |
To respond to this need, a number of different systems have been proposed, consisting of a combination of high capacity batteries such as lithium secondary batteries and compact fuel cells with high output EDLCs. However, it has been difficult to adapt a conventional capacitor to mobile devices because of the size factor. |
| (4) |
While producing extremely high power, Teijin's new capacitor is so small and thin that it is expected to propose a solution that meets the need for high capacity and high output batteries. |
2.Features of the New Capacitor
| (1) |
Small and Ultra-Thin
With a volume of 0.28 cc and a thickness of 0.6 mm, this "paper-like" capacitor is readily mountable on small spaces in mobile devices. |
| (2) |
Super high outputs
While small and ultra-thin, it produces a transient current output on the order of amperes. In addition, its effective volume density at this high rate discharge (at 1000 C.*1.) is more than double that of capacitors currently on the market.*2 |
| (3) |
Low temperature characteristics
In a low temperature environment at -20°C, its output characteristics are as high as 80% of those at room temperature. |
| *1 : |
Refers to the output current rate when a fully-charged capacitor is completely discharged in one-thousandth of an hour (or 3.6 seconds) |
| *2 : |
With general capacitors, a high current output around 1000 C causes the internal loss to significantly lower the effective energy density. |
3.Future Developments
With its outstanding features, this capacitor has application with cellular phones, personal digital assistants, digital still cameras, HDD players, non-contact communication cards, IC tags and many other devices.
Teijin will continue to develop a wide range of uses for the capacitor and to develop technologies for mass production. Optionally using joint development and other approaches, Teijin will aim to commercialize the product within the next three years.
End
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Information in the press releases is current on the date of the announcement.
It is subject to change without prior notice.
