|Title||A 7Li NMR study of lithium insertion into lithium manganese oxide spinel|
|Publication Type||Journal Article|
|Year of Publication||2000|
|Authors||Michael C Tucker, Jeffrey A Reimer, Elton J Cairns|
|Journal||Electrochemical and Solid-State Letters|
7Li magic angle spinning nuclear magnetic resonance was used to observe coexisting cubic and tetragonal phases in Li1+xMn2O4. Cubic phase peaks are observed at 500-580 ppm vs. 1 M LiCL(aq); tetragonal phase peaks are observed around 100 ppm. Cycling Li1+xMn2O4 on the 3 V plateau does not result in significant changes in the cubic phase. A small amount of residual tetragonal phase accounting for ∼3% of the 7Li NMR intensity, however, is observed in spinel deep discharged to x=1 then returned to x=0.