Thermal runaway of Lithium-ion batteries employing LiN(SO₂F)₂-based concentrated electrolytes.

ABSTRACT: Concentrated electrolytes usually demonstrate good electrochemical performance and thermal stability, and are also supposed to be promising when it comes to improving the safety of lithium-ion batteries due to their low flammability. Here, we show that LiN(SO₂F)₂-based concentrated electrolytes are incapable of solving the safety issues of lithium-ion batteries. To illustrate, a mechanism based on battery material and characterizations reveals that the tremendous heat in lithium-ion batteries is released due to the reaction between the lithiated graphite and LiN(SO₂F)₂ triggered thermal runaway of batteries, even if the concentrated electrolyte is non-flammable or low-flammable. Generally, the flammability of an electrolyte represents its behavio

SUBMITTER: Hou J 

PROVIDER: S-EPMC7547674 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature