Developed "lithium air cell", such as SoftBank.Capacity is several times that of lithium ions

The Materials and Material Research Organization (NIMS) develops a 500WH/kg -class lithium air cell that greatly exceeds the current lithium -ion battery, which is much higher than the current lithium -ion battery, and has a charging electric reaction at room temperature.It was realized.It is said that it is currently achieving the world's highest level of energy density.

The lithium air cell is used as a positive positive active material, using oxygen in the air and using a lithium metal for the negative electrode, so that the theoretical weight energy density reaches several times that of the current lithium -ion battery.I will.Due to the light and large capacity, a wide range of applications such as drones, electric vehicles, and home power storage systems are expected.

The weight energy density is the capacity of the battery per unit weight, and the larger the value, the more energy can be stored in the battery even with the same weight.

NIMS was conducting basic research with the support of the ALCA next-generation battery (Alca-spring), which was launched to accelerate the research and development of high-capacity storage batteries by the Science and Technology Agency (JST), but in 2018.Established the "NIMS-SoftBank Technology Development Center" in collaboration with SoftBank.We have been conducting research for practical use for mobile phone base stations, IoT, and HAPS (High Altitude Platform Station).

Lithium air cells have a very high energy density theoretically, but batteries that have been generally used in conventional lithium air cell characteristics are batteries that are not directly involved in battery reactions such as separator and electrolytic solution.It accounted for and evaluated lithium air cells with high energy density, which accounted for a large percentage of weight.

This result is an electrolytic liquid technology and electrode laminated technology developed by the NIMS-SoftBank Advanced Technology Development Center for proprietary materials such as "porous carbon electrodes" developed by Alca-Spring and electrolytes containing ledox mediators.High -energy density lithium air battery cell production technology is applied.The world's first 500WH/kg -class lithium air cells, which significantly exceed the current lithium -ion battery, have been fully achieved in the room temperature in the world.

In the future, the 500WH/Kg -class lithium air battery will be equipped with an improvement material under development to significantly increase the cycle life, aiming for early practical use of lithium air cells.