Improved cycleability of LiMn2O4-based thin films by Sn substitution

Dong Wook Shin, Ji Won Choi, Won Kook Choi, Yong Soo Cho, Seok Jin Yoon

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number064101
JournalApplied Physics Letters
Volume93
Issue number6
DOIs
Publication statusPublished - 2008 Aug 25

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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