每周分享９�/span>Facile preparation of core@shell and concentration-gradient spinel particles for Li-ion battery cathode materials

今天给大家分享的�?/span>2015平�/span>2月份〉�/span>Science and Technology of Advanced Materials《�/span>上发表的一篇名为：Facile preparation of core@shell and concentration-gradient spinel particles for Li-ion battery cathode materials

文章摘要如下９�/span>

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 MnO₂core and the Li(Ni,Mn)₂O₄spinel shell are prepared by mechanical treatment using an attrition-type mill, whereas the concentration-gradient spinel particles with an average composition of LiNi_0.32Mn_1.68O₄are produced by calcination of their core@shell particles as a precursor. The concentration-gradient LiNi_0.32Mn_1.68O₄spinel cathode exhibits the high discharge capacity of 135.3 mA h g^�?, 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.

该文章中材料表征采用的是美国麦克仪器3Flex

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