CEA-Leti has fabricated all-solid, inorganic thin-film batteries (TFBs) that demonstrate better performance than existing devices, potentially expanding the market for tiny energy-storage units in medical implantable, injectable and wearable solutions. The CEA-Leti team's solution is a high-energy-density, millimeter-scale, thin-film battery integrating 20μm-thick LiCoO2 cathode in a Li-free anode configuration.

The current devices demonstrate an energy density of 890 μAh.cm², the highest reported so far for such devices. The TFB architecture can reach a capacity as high as 450 μAh.cm² under 3mA.cm² current density. The fabrication process is viable for industrial large-scale production and allows control and fine-tuning of the device electrochemical properties.

For more information, please visit: www.leti-cea.com/cea-tech/leti/english