FDK Corp prototyped an all-solid battery by using a new positive-electrode material co-developed with Fujitsu Laboratories Ltd.
FDK exhibited the battery at the 9th Int'l Rechargeable Battery Expo, which took place from February 28 to March 2, 2018, at Tokyo Big Sight. FDK will start to ship samples by December 2018, aiming to sell the battery for IoT (Internet of Things) devices.
The exhibited battery uses a positive-electrode material that enables to charge/discharge electricity at a voltage of about 5V. The material is Li2CoP2O7 with a capacity density of 860Wh/kg. The density is more than 50% higher than that of LiCoO2, which is used for many existing lithium-ion (Li-ion) rechargeable batteries. FDK and Fujitsu Laboratories announced the development of the material in 2017.
Mass production technologies for laminated ceramic capacitors and laminated inductors can be applied to laminated all-solid batteries, and, therefore, many electronic parts manufacturers are developing laminated all-solid batteries. Many of such batteries are called "oxide-based batteries" and use ceramics for electrolyte, etc. And FDK is developing this type of battery.
Because of the different electrode material, FDK's all-solid battery realizes a capacity density more than 10 times higher than that of TDK's all-solid battery, which will be commercialized earlier (See related article). The new battery can have a larger capacity with the same size, and, therefore, FDK expects that it will be used for a wider variety of applications.