Structural Aspects and Performance Capabilities of Thin-Film Batteries

1 Structural Aspects and Performance Capabilities of Thin-Film Batteries 

The thin-film battery weighs less than approximately 50 g. Its circuit voltage (OCV) is around 3.8 V, and the battery can be designed for a capacity ranging from 0.1 to 5 mAh, depending on the battery size and thickness restrictions. The electrical connections are made from metal foils with typical dimensions of 10 mm (0.394 in) in length, 2 mm (0.0788 in) in width, and 0.1 mm (0.00394 in) in thickness. Battery size is strictly a function of its capacity. Technical information and performance characteristics of microbatteries can be summarized as follows  

The battery chemistry is composed of solid-state films and uses Uthium-phosphorus-oxynitride (LiPON) solid-state electrolyte developed by Oak Ridge National Laboratory. The cathode is made from LiCo02 and the anode uses a very small amount of lithium metal. 

This microbattery contains no toxic liquid electrolyte and is free from outgas-sing and explosion problems. 

The thin-film battery package contains five critical components, namely the anode, electrolyte, cathode, current collector, and ultra-thin substrate. 

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