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.
Bibliographical noteFunding Information:
The authors acknowledge the financial support from Korea Institute of Science and Technology, the project of “Development on Functional Thin Film Materials for Driving USN Sensors” and the Pohang Light Source (PLS) for the XAS measurements.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)