US8722246B2
University of Texas System
The present invention includes compositions and methods of making cation-substituted and fluorine-substituted spinel cathode compositions by firing a LiMn 2−y−z Li y M z O 4 oxide with NH 4 HF 2 at low temperatures of between about 300 and 700° C. for 2 to 8 hours and a η of more than 0 and less than about …