Investigation on the electrochemical performances of Li₄Mn₅O₁₂ for battery applications

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• 作者：N. H. Zainol ; Z. Osman ; N. Kamarulzaman ; R. Rusdi
• 关键词：Cathode material ; Li4Mn5O12 ; Li ; ion battery ; XRD ; FESEM
• 刊名：Ionics
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：23
• 期：2
• 页码：303-307
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Electrochemistry; Renewable and Green Energy; Optical and Electronic Materials; Condensed Matter Physics; Energy Storage;
• 出版者：Springer Berlin Heidelberg
• ISSN：1862-0760
• 卷排序：23

文摘

In this study, well-crystallized Li₄Mn₅O₁₂ powder was synthesized by a self-propagating combustion method using citric acid as a reducing agent. Various conditions were studied in order to find the optimal conditions for the synthesis of pure Li₄Mn₅O₁₂. The precursor obtained was then annealed at different temperatures for 24 h in a furnace. X-ray diffraction results showed that Li₄Mn₅O₁₂ crystallite is stable at relatively low temperature of 400 °C but decompose to spinel LiMn₂O₄ and monoclinic Li₂MnO₃ at temperatures higher than 500 °C. The prepared samples were also characterized by FESEM and charge-discharge tests. The result showed that the specific capacity of 70.7 mAh/g was obtained within potential range of 4.2 to 2.5 V at constant current of 1.0 mA. The electrochemical performances of Li₄Mn₅O₁₂ material was further discussed in this paper.