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Sony Introduces Lithium Iron Phosphate Cells for Mobile Devices

Sony Corporation has launched a new type of lithium ion secondary battery that combines high-power and long-life performance, using olivine-type lithium iron phosphate as the cathode material. Shipment commenced in June 2009.

The Olivine-type lithium iron phosphate used in this new 18650-type battery is suited for use as a cathode material due to its robust crystal structure and stable performance, even at high temperatures.

By combining this new cathode material with Sony’s proprietary particle design technology that minimizes electrical resistance to deliver high power output, and also leveraging the cell structure design technology Sony accrued developing its current Fortelion series lithium-ion secondary battery line-up, Sony has realized a power density of 1800W/kg and extended life span of approximately 2,000 charge-discharge cycles.

Capacity of the cell is 1.1 Ah, nominal voltage is 3.2V, and energy density is 95 Wh/kg. Maximum continuous discharge current is 20A.

Furthermore, with this new battery able to charge rapidly, in addition to providing a stable discharge of voltage, it will first be supplied for use in motor driven devices such as power tools, after which its application will be expanded to a wide range of other mobile electronic devices.



No plans for EV applications out of Sony. But at 1800W/kg it seems like a worthy technology for someone to license.

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The properties of this cell are very similar to the 18650 cell from A123.

The A123 cell is still capable of 30A continuous discharge versus 20A for the Sony cell but A123 got some serious competition for sure.


May be the price will be more competing with LG and A123 cells.

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