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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Structural characterization of layered LiNi_(0.85-x)Mn_xCo_(0.15)O_2 with x = 0,0.1,0.2 and 0.4 oxide electrodes for Li batteries
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Structural characterization of layered LiNi_(0.85-x)Mn_xCo_(0.15)O_2 with x = 0,0.1,0.2 and 0.4 oxide electrodes for Li batteries

机译：锂电池x = 0,0.1,0.2和0.4氧化物电极的层状LiNi_（0.85-x）Mn_xCo_（0.15）O_2的结构表征

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摘要

We report the synthesis of LiNi_(0.85-x)Co_(0.15)Mn_xO_2 positive electrode materials from Ni_(0.85-x)Co_(0.15)Mn_x(OH)_2 and Li_2CO_3. XRD and XPS are used to study the effect of Mn-doping on the microstructures and oxidation states of the LiNi_(0.85-x)Co_(0.15)Mn_xO_2 materials. The analysis shows that Mn-doping promotes the formation of a single phase. With increasing substitution of Mn ions for Ni ions, the lattice parameter a decreases, while the lattice parameters c and c increase. XPS revealed that the oxidation states of Ni, Co and Mn in LiNi_(0.85-x)Co_(0.15)Mn_xO_2 compounds (where x = 0.1, 0.2 and 0.4) were +2/+3, +3 and +4. The substitution of Mn ions for Ni ions induces a decrease in the average oxidation state of Ni. Because the substitution of Mn for Ni ions is complex, the extent of the changes between the lattice parameter and L_(M-o) differ. The occupation of Ni in Li sites is affected by the ordering of Mn~(4+) with Ni~(2+) and Mn~(4+) with Li~+.
机译：我们报道了由Ni_（0.85-x）Co_（0.15）Mn_x（OH）_2和Li_2CO_3合成LiNi_（0.85-x）Co_（0.15）Mn_xO_2正极材料。用XRD和XPS研究了Mn掺杂对LiNi_（0.85-x）Co_（0.15）Mn_xO_2材料的微观结构和氧化态的影响。分析表明，Mn掺杂促进了单相的形成。随着Mn离子对Ni离子取代的增加，晶格参数a减小，而晶格参数c和c a增大。 XPS显示，LiNi_（0.85-x）Co_（0.15）Mn_xO_2化合物（x = 0.1、0.2和0.4）中Ni，Co和Mn的氧化态为+ 2 / + 3，+ 3和+4。 Mn离子代替Ni离子会导致Ni的平均氧化态降低。因为用Mn代替Ni离子很复杂，所以晶格参数和L_（M-o）之间的变化程度不同。 Mn〜（4+）与Ni〜（2+）和Mn〜（4+）与Li〜+的顺序影响着Ni在Li位点的占有率。

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