Sony Develops Li-Ion Secondary Battery Using Olivine-Type Li-Iron Phosphate as Cathode Material

Aug 12, 2009 16:25 Nikkei Electronics Asia

Sony Corp has introduced a new type of lithium ion secondary battery that is claimed to combine high-power and long-life performance, using olivine-type lithium iron phosphate as the cathode material. The olivine-type lithium iron phosphate used in this battery is suitable for use as a cathode material due to its robust crystal structure and stable performance, even at high temperatures.

Sony has leveraged its proprietary particle design technology that realizes high power by minimizing electrical resistance, together with the cell structure design technology it accrued developing its current lithium ion secondary battery line-up to successfully achieve high-power density of 1800W/kg. This enables the new battery to discharge large currents, while also providing a stable output of voltage, making it suitable for use in motor driven applications such as power tools.

This battery delivers an extended life-span of over four-times existing secondary lithium ion batteries used in conventional electronic devices (G-series, A-series) due to the olivine-type lithium iron phosphate's robust crystal structure, and Sony's proprietary particle design technology. Its enhanced durability makes this battery suitable for use in a wide range of mobile electronic devices.

This battery can be charged to 99% of its full capacity in 30 minutes, which represents approximately half the charge time of Sony's current lithium ion battery line-up (G-series, A-series), which mainly use cobalt oxide based cathodes.

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