NEC's New Battery Recharges In 30 Seconds
NEC today announced that it has succeeded in the development of an ultra-thin, flexible, rechargeable battery capable of 30-second charging, which can be embedded into smartcards and intelligent paper. The new organic radical battery (ORB) uses a type of plastic called organic radical polymer as its cathode.
Organic radical polymer assumes an electrolyte-permeated gel state and is the reason why the rechargeable battery is so flexible and pliant. In addition, the organic radical polymer electrode reaction is extremely fast and the supporting salts migrate through gel state polymer very smoothly. This results in little resistance to the charging reaction and an incredibly fast charging time of less than 30 seconds. The new battery also does not contain any harmful heavy metals such as mercury, lead or cadmium.
Key features of the newly developed battery include:
- 300-micron thickness
- Pliant and bendable structure
- 30-second recharging speed
- Energy density of approx. 1 mWh per cm² (This means, for example, that if the ORB was used in an active RFID device, it would support up to about several tens of thousands of signal transmissions on a single charge.)
- Does not contain any harmful metals
NEC will continue to carry out aggressive R&D in this area toward enhanced performance and reliability of thin, flexible rechargeable ORBs. The results of this research will be exhibited at iEXPO 2005 being held at Tokyo Big Site, Japan, from December 7 - 9, 2005.
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