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

今天给大家分享的是2015年2月份 《》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：

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 lini_0.32mn_1.68o₄ are produced by calcination of their core@shell particles as a precursor. the concentration-gradient lini_0.32mn_1.68o₄ 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.

该文章中材料表征采用的是美国麦克仪器3flex

详情可参考下面链接：

http://iopscience.iop.org/1468-6996/16/1/015006