Zhu H.-L., Chen Z.-Y., Ji S., Linkov Vladimir.
Institute of Materials Science and Engineering, Changsha University of Science and Technology, 410076, China; SAIAMC, University of the Western Cape, Cape Town, South Africa
Zhu, H.-L., Institute of Materials Science and Engineering, Changsha University of Science and Technology, 410076, China; Chen, Z.-Y., Institute of Materials Science and Engineering, Changsha University of Science and Technology, 410076, China, SAIAMC, University of the Western Cape, Cape Town, South Africa; Ji, S., SAIAMC, University of the Western Cape, Cape Town, South Africa; Linkov, Vladimir., SAIAMC, University of the Western Cape, Cape Town, South Africa
A controlled crystallization method was adopted to synthesize spherical MnCO3, then it was mixed uniformly with Li2CO3 in agate mortar, followed by calcinations at 600 °C and 800 °C for 10 and 24 h respectively, and as a result the spherical or sphere-like spinel LiMn2O4 was formed. The electrochemical performances of LiMn2O4 prepared by normal solid-state reaction and controlled crystallization method respectively were compared. It showed that the stoichiometric spherical LiMn2O4 had obviously excellent electrochemical performance, whose initial reversible capacity was 129.40 mAh/g with the high capacity retention of 95.28% after 100 cycles, than those of the polyhedral LiMn2O4 synthesized by the solid-state reaction, whose initial reversible capacity was 129.12 mAh/g with the capacity retention of 77.38% after 100 cycles. © 2008 Elsevier B.V. All rights reserved.