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Synthesis and improved electrochemical performance of LiMn2 – xGdxO4 based cathodes
P. Ram, A. Gören, S. Ferdov, M.M. Silva, G. Choudhary, R. Singhal, C.M. Costa, , S. Lanceros-Méndez
Published in Elsevier B.V.
Volume: 300
Pages: 18 - 25
LiMn2 – xGdxO4 (x = 0.00, 0.01 and x = 0.04) spinel active material were prepared by sol-gel method. The morphology, crystal structure, thermal stability and electrochemical properties of the synthesized samples were evaluated. Gd-doping maintains the cubic spinel structure of LiMn2O4, leads to a decrease of the average particle size, and has a strong influence on the electrochemical properties of the cathodes. LiMn2 – xGdxO4 cathode materials show two pairs of separated redox peaks, independently of the Gd-doping. After 40 charge-discharge cycles at C/2, the discharge capacity was 55.9 mAh·g− 1 and 33 mAh·g− 1 for x = 0.04 and x = 0, respectively, corresponding to a capacity retention of 80% and 70%, respectively. The Gd-doped with x = 0.04 showed improved cycling performance with respect to pristine LiMn2O4 due the smaller particle size and superior structural stability, showing its suitability for lithium-ion battery applications. © 2016 Elsevier B.V.
About the journal
JournalData powered by TypesetSolid State Ionics
PublisherData powered by TypesetElsevier B.V.
Open AccessNo