《Progress in safe materials for Li-ion battery》

The main cause of lithium-ion battery safety issue is thermal runaway (TR) under abusive conditions. In view of the causes of TR of Li-ion batteries, the recent progress in the design of safe Li-ion battery materials such as separators, electrolyte, cathode and anode are summarized. It mainly includes: surface modification, new type separators, thermal response separators and other separators protection technology; Ionic liquid, fluorinated solvent, organophosphate ester solvent and phosphorous acid flame retardant are used to construct safer electrolyte. Surface coating improves the thermal stability of cathode materials; The layered structure of graphite is optimized to inhibit the reaction of lithium leaching at high current density.

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