University Of Tokyo Researchers Boost Lithium Battery Safety With New TFEP Electrolyte

- Apr 02, 2020-

University of Tokyo Researchers Boost Lithium Battery Safety With New TFEP Electrolyte

For the first time, researchers at the University of Tokyo have explored the physical and chemical properties of electrical energy storage and discovered new ways to improve lithium-ion batteries. They not only successfully improved the voltage transmission capability of lithium-ion batteries, but also successfully improved the safety of lithium-ion batteries.

Current lithium-ion batteries have safety issues that can damage the device and cause a fire. Researchers at the University of Tokyo's Graduate School of Engineering and the Graduate School of Science have proposed a way to improve the safety of lithium-ion batteries.

"The voltage of the battery is mainly limited by the electrolyte material. The electrolyte solvent in lithium-ion batteries is still the one used in the commercialization in the early 1990s. So we found an improved method. We The new fluorinated cyclic phosphate solvent (TFEP) electrolyte greatly improves existing ethylene carbonate (EC). "

University of Tokyo researchers boost lithium battery safety with new TFEP electrolyte



Ethylene carbonate is flammable and unstable above 4.3 volts; on the other hand, tris (2,2,2-trifluoroethyl) phosphate is non-flammable and can withstand up to 4.9 volts High voltage. This extra voltage means the battery can last longer.

"We are proud of this progress, and its effectiveness is a bit surprising. This is because our method of proposing TFEP is novel in itself. Most of the research on electrolytes crosses the river by feeling the stones. Our method comes from For a theoretical understanding of the underlying molecular structure. Before experimental verification, we predicted safe high-voltage characteristics. So, this is really an unexpected surprise. "