Effect of different MnO2 precursors on the electrochemical properties of spinel LiNi0.5Mn1.5O4 cathode active materials for high-voltage lithium ion batteries
By Ye Ma and Haoqing Tang and Zhiyuan Tang and Wenfeng Mao and Xinhe Zhang
Published in Materials Science and Engineering: B
NULL
2016
Abstract
LiNi0.5Mn1.5O4 (LNMO) cathode materials with different morphologies are prepared via a facile template method using various MnO2 precursors. The structures, morphologies and electrochemical properties of the as-prepared LiNi0.5Mn1.5O4 samples are tested by various physical and electrochemical methods. The results of characterization show that the spinel \LNMO\ cathode materials have good crystal structure and the MnO2 precursors have no effect on the final products. Moreover, the specific morphology of \LNMO\ is closely related to that of MnO2 precursor, and further influence the electrochemical performance. In addition, the \LNMO\ sample using \NH4HCO3\ as precipitant exhibits excellent rate capability and cyclic stability in all as-prepared samples. Cycled at 0.5 and 1 C, the discharge capacities of \LNMO\ cathode active particles using \NH4HCO3\ as precipitant are 110.6 and 102.2 after 200 charge
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