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Li4–xMgxTi5O12(0.05≤x≤0.2) Anode Material with Improved Rate and Electrochemical Performance for Li-Ion Batteries

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Spinel-type electrode material Li4–xMgxTi5O12 (x = 0.05, 0.1, 0.15, 0.2) was synthesized by solid state reaction. Magnesium was doped Li4Ti5O12 to improve the electrochemistry and cycle performances. The samples were characterized by XRD and the grain size analysis was studies by laser particle-size analyzer. The curve of charge and discharge and cycles of Mg doped Li4Ti5O12 were researched. The results showed that the electrochemistry properties and cycle performance of magnesium doped Li4Ti5O12 materials were improved. Among the series samples investigated, it was found that the Li4–xMgxTi5O12 (x = 0.1) has a good electrochemistry performance, the first discharge special capacity was 175.3, 148.6, 140.3, 123.6 mAh·g–1at 0.5 C, 1 C, 5 C, 10 C rate, respectively.
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Keywords: ANODE MATERIAL; HIGH PERFORMANCE; LI4TI5O12; LITHIUM-ION BATTERIES; MAGNESIUM DOPED

Document Type: Research Article

Publication date: February 1, 2011

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