Flame Retardant Ions (FRIONs) are bifunctional lithium borate and phosphate salts which have integrated organophosphorus groups to promote char formation upon combustion. These salts, in turn offer promise as potential safety enhancing additives for electrolyte solutions in lithium-ion batteries. Our group has previously generated and structurally characterized three class of FRIONs, with different variations in structure. These past examples of FRIONs suffered from limited solubility. This presentation will report on recent efforts towards synthesis, spectroscopic and structural characterization of new FRIONs that builds on previously reported salts. Specifically, systematic variations of the P(=O)(OR)2 units on these materials are examined for their impact on the overall structure and solubility of these novel functional materials.

Organophosphorus bifunctional lithium borate salts

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ACS Fall 2022

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