Material for solid-state batteries offers 100 times higher energy density

TDK Corporation has successfully developed a material for CeraCharge, a next-generation solid-state battery with an energy density of 1,000Wh/L, approximately 100 times greater than the energy density of the company's conventional solid-state battery.

This technology is aimed at a solution that can be used in various wearable devices, such as wireless earphones, hearing aids and even smartwatches, to replace existing coin cell batteries.

Using the company's proprietary material technology, it has developed a material for the new solid-state battery with a remarkably higher energy density than its conventional mass-produced solid-state batteries (CeraCharge) due to the use of oxide-based solid electrolyte and lithium alloy anodes. The use of oxide-based solid electrolyte makes batteries extremely safe. It is intended for use in wearable and other devices that come in direct contact with the human body.

The battery can be used to replace coin cell primary batteries in compliance with EU battery regulations, which require replacing them with rechargeable batteries. This is expected to reduce environmental impact.

The company strives to develop the battery cells and package structure design and advance toward mass production, targeting the development of its new product, the solid-state battery. Moreover, it aims to improve the batteries' capacity through multi-layer lamination technology and expand their operating temperature range by applying the production engineering technology it has accumulated in the electronic components business.

The use of oxide-based solid electrolyte makes battery extremely safe. The smaller size and higher capacitance contribute to smaller device size and longer operating time.