The spinel thin films of LiSnx/2Mn2-xO4 prepared by pulsed laser deposition were studied in regards with electrochemical reversibility and discharge capacity. LiSn0.0125Mn 1.975O4 thin films possessed a large capacity of ∼120 mA h g-1 and a high capacity retention of >81% relative to their initial capacity at 4 C after the 90th cycle. Such promising results are believed to originate from the Mn4+ -richer spinel structure and the less distortion of MnO6 octahedra. The near-edge x-ray-absorption fine structure result of the cycled LiSn0.0125Mn 1.975O4 films can be highlighted with the specific local t2g symmetry resulting from the interaction between Mn 3d and O 2p.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)