Japanese companies FDK Corporation and Fujitsu laboratories have jointly developed lithium cobalt pyrophosphate (Li2CoP2O7), which has high energy density, for the cathode material of all-solid Lithium-ion batteries. The new cathode material helps in increasing the storage density of solid-state lithium ion batteries with higher voltage. Solid-state batteries offer higher safety levels.
FDK Is working on the research of all solid-state batteries having higher density, safety and long battery life. The computer-aided engineering technology from FDK and material technologies from Fujitsu laboratories were combined in developing a cathode material "lithium cobalt pyrophosphate (Li2CoP2O7)" for all-solid-state batteries. This new material offers 1.5x higher energy density compared to the existing cathode materials for lithium ion batteries.
By using computational physics developers could see this new material has the capability of operating at twice energy density of existing cathode materials used in lithium ion batteries. both the companies plan to use this material to develop all solid-state batteries for the IOT, mobile and wearable market.
This technology to be displayed at a event called BATTERY JAPAN 2017 (8th international rechargeable battery expo) being held from March 1 to 3, 2017, at Tokyo Big Sight.
Below is a picture of batteries charge and discharge characteristics and also the comparison of this new cathode with conventional cathode materials:
Black line: Charge curve
Red line: Discharge curve
What makes the solid-state batteries solid is the use of solid electrolyte instead of liquid electrolyte. Since electrolyte is solid, there won't leakage issues, and the batteries can be operated at highest temperature. FDK is using an inflammable oxide-based material in its solid-state batteries.