Sony Electronics Inc. - About Sony's OEM Lithium Ion Batteries

As far as consumers are concerned, the future runs on rechargeable batteries. They enable engineers to build smaller, more powerful portable electronic devices that give consumers greater mobility and freedom.
No company understands this better than Sony — the leader in innovative consumer electronics. Our products have benefited from our long-lasting, reliable, powerful lithium-ion rechargeable battery technology. Now, yours can, too.
Sony Lithium Rechargeable batteries are available for OEM applications. In addition to reducing weight and increasing design flexibility with their compact dimensions, they offer excellent cycle performance. What's more, our sales and manufacturing facilities all over the world deliver outstanding supply chain support.
Lithium Polymer Batteries

High energy density reduces weight without sacrificing performance
Non-liquid electrolyte construction improves reliability and safety
Discharge load characteristics, low-termperature and cycle performance similar to conventional Lithium Ion batteries based on liquid electrolytes

Battery construction and configuration

Charge/discharge mechanism

Battery charging and discharging occurs through the migration of lithium ions between the cathodes and anodes and the exchange of electronics through doping and dedoping.
More specifically, during charging lithium is dedoped from cathodes consisting of a lithium-containing compound, and the inerlayers of carbon in anodes are doped with lithium. Conversely, during discharge lithium is dedoped from between the carbon layers in anodes, and the compound layers in cathodes are doped with lithium. Reactions occurring in lithium ion rechargeable batteries employing lithium cobaltate in cathodes and carbon in anodes are shown in the figure above.
By means of the initial charging, which takes place during battery manufacture, lithium ions migrate from the lithium compound of the cathode to the carbon material of the anode.

Subsequent discharge reactions occur through the migration of lithium ions from the anode to the cathode.

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