Content of research

The use of lithium-ion batteries has been expanding rapidly due to their high energy density. On the other hand, since organic solvents are used in the battery electrolyte, it is important to ensure their fire safety. With this study, we intend to develop a method to quantify the effect of adding a combustion inhibitor to suppress the combustion of organic solvents, search for additives that are effective in suppressing combustion, and study the effect of the lithium salt contained in the electrolyte itself on the flammability of organic solvents. We also conduct modeling and numerical analysis of fire phenomena taking the elementary reaction kinetics of combustion in an electrolyte into consideration.

Potential for social implementation

• Lithium-ion batteries are increasingly being used in automobiles and for energy supply leveling through the storage of natural energy. Due to an increase in the integrated use of lithium-ion batteries, it has become an important task to improve their fire safety. This research is aimed to directly contribute to this.

Appealing points to industry and local governments

This research focuses on the suppression of the combustion of the electrolyte in lithium-ion batteries. This research is an attempt to propose fire suppression measures considering the fire occurrence scenario of lithium-ion batteries that are used in an integrated manner.