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首页> 外文期刊>International Journal of Electrochemical Science >Effect of Composition on the Structural and Electrochemical Properties of (1-x-y)Li[Li1/3Mn2/3]O2-xLiFeO2-yLiNiO2 Solid Solution Cathode Materials
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Effect of Composition on the Structural and Electrochemical Properties of (1-x-y)Li[Li1/3Mn2/3]O2-xLiFeO2-yLiNiO2 Solid Solution Cathode Materials

机译：组成对（1-xy）Li [Li 1/3 Mn 2/3 ] O 2-x LiFeO 2-y LiNiO 2 固溶体阴极材料

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摘要

Uniform solid solution of (1-x-y)Li[Li1/3Mn2/3]O2-xLiFeO2-yLiNiO2 (x+y.5) were prepared by citricacid assisted sol-gel process, and the effects of composition on the structural and electrochemicalproperties of as-prepared samples were investigated. The results indicate that all samples prepared at650 ~ 800 show pure hexagonal phase. The composition has noticeable effects on structuralproperties such as interplaner spacing d003, crystal particle size, crystallinity and 2D cation-ordering,thus affect electrochemical performance. Obvious cooperative effects are observed for the sampleswith suitable amount of composited LiNiO2 and LiFeO2 (x+y.3~0.4). In view of capacity, cyclingperformance and cost, the samples with x+y.3~0.4 and x/y=1.6~3.0 are considered to be more-1 promising new cobalt-free cathode materials with high capacity of more than 240 mAhg .
机译：柠檬酸辅助溶胶-凝胶法制备了（1-xy）Li [Li1 / 3Mn2 / 3] O2-xLiFeO2-yLiNiO2（x + y.5）的固溶体，并考察了其组成对溶液结构和电化学性能的影响。研究了制备好的样品。结果表明，在650〜800℃下制备的所有样品均显示纯六角相。该组合物对结构性质具有显着影响，例如晶间间距d003，晶体粒度，结晶度和2D阳离子有序性，因此影响电化学性能。适量的LiNiO2和LiFeO2复合样品（x + y.3〜0.4）具有明显的协同作用。考虑到容量，循环性能和成本，x + y.3〜0.4和x / y = 1.6〜3.0的样品被认为是具有更大前景的新型无钴正极材料，具有超过240 mAhg的高容量。

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