Phosphoryl‐Rich Flame‐Retardant Ions (FRIONs): Towards Safer Lithium‐Ion Batteries |
| |
| Authors: | Michael F. Rectenwald Joshua R. Gaffen Prof. Arnold L. Rheingold Dr. Alexander B. Morgan Prof. John D. Protasiewicz |
| |
| Affiliation: | 1. Department of Chemistry, Case Western Reserve University, 10900 Euclid Ave., Cleveland, OH 44106 (USA);2. Department of Chemistry and Biochemistry, University of California at San Diego, La Jolla, CA 92093‐0358 (USA);3. Energy Technology and Materials Division, University of Dayton Research Institute, Dayton, OH 45469 (USA) |
| |
| Abstract: | The functionalized catecholate, tetraethyl (2,3‐dihydroxy‐1,4‐phenylene)bis(phosphonate) (H2‐DPC), has been used to prepare a series of lithium salts Li[B(DPC)(oxalato)], Li[B(DPC)2], Li[B(DPC)F2], and Li[P(DPC)3]. The phosphoryl‐rich character of these anions was designed to impart flame‐retardant properties for their use as potential flame‐retardant ions (FRIONs), additives, or replacements for other lithium salts for safer lithium‐ion batteries. The new materials were fully characterized, and the single‐crystal structures of Li[B(DPC)(oxalato)] and Li[P(DPC)3] have been determined. Thermogravimetric analysis of the four lithium salts show that they are thermally stable up to around 200 °C. Pyrolysis combustion flow calorimetry reveals that these salts produce high char yields upon combustion. |
| |
| Keywords: | flame retardant lithium‐ion battery phosphorus weakly coordinating anions |
|
|
