Enhancing Lithium Ion Conductivity and Flame Retardancy of Solid Polymer Electrolytes through the Incorporation of Dimethyl Methylphosphonate as an Additive
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초록
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Solid polymer electrolytes (SPEs) are promising alternatives to liquid electrolytes due to their light weight, no electrolyte leakage, and good flexibility and processability. However, there are still new problems such as flammability, poor ionic conductivity and electrochemical stability. in this study, it is intended to solve these problems by imparting flame retardancy to the polymer electrolyte and promoting the migration of lithium ions. Methyl phosphonate (DMMP) has been found to act as a plasticizer that binds lithium ions and reduces the binding energy between ethylene oxide (EO) groups and lithium ions. It also functions to capture active radicals and impart strong flame retardancy. This dual functionalities greatly promotes the migration of lithium ions in the polymer electrolyte and effectively suppresses the combustion of the polymer electrolyte.