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每周分享
美國麥克儀器  2015-07-14  |  閱讀:1369

每周分享:Facile preparation of core@shell and concentration-gradient spinel particles for Li-ion battery cathode materials

今天給大家分享的是20152月份 Science and Technology of Advanced Materials上發(fā)表的一篇名為:Facile preparation of core@shell and concentration-gradient spinel particles for Li-ion battery cathode materials

文章摘要如下:

Core@shell and concentration-gradient particles have attracted much attention as improved cathodes for Li-ion batteries (LIBs). However, most of their preparation routes have employed a precisely-controlled co-precipitation method. Here, we report a facile preparation route of core@shell and concentration-gradient spinel particles by dry powder processing. The core@shell particles composed of the MnO2 core and the Li(Ni,Mn)2O4 spinel shell are prepared by mechanical treatment using an attrition-type mill, whereas the concentration-gradient spinel particles with an average composition of LiNi0.32Mn1.68O4 are produced by calcination of their core@shell particles as a precursor. The concentration-gradient LiNi0.32Mn1.68O4 spinel cathode exhibits the high discharge capacity of 135.3 mA h g?1, the wide-range plateau at a high voltage of 4.7 V and the cyclability with a capacity retention of 99.4% after 20 cycles. Thus, the facile preparation route of the core@shell and concentration-gradient particles may provide a new opportunity for the discovery and investigation of functional materials as well as for the cathode materials for LIBs.

該文章中材料表征采用的是美國麥克儀器3Flex

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