Chemical delithiation and exfoliation of [Formula: see text].

Chemical delithiation and exfoliation of [Formula: see text].
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DOI:
10.1016/j.jssc.2014.08.011
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发表时间:
2014-12
影响因子:
3.3
通讯作者:
White, John W.
White, John W.
中科院分区:
化学3区
文献类型:
--
作者:
Basch, Angelika;de Campo, Liliana;Albering, Joerg H.;White, John W.

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市售的钴酸锂 () 的逐步化学脱锂显示出晶体特性的连续变化。 Rietveld 对高分辨率 X 射线和中子衍射的改进表明,化学脱锂样品的晶格参数 c 增加,晶格参数 a 减少。使用电子显微镜,我们还跟踪了样品纹理的变化,我们发现,关键层化学计量约为 x=1/3,导致颗粒剥落。脱锂蚀刻的模式表明,未缓解的应变场可能会产生化学活性。化学去掺杂的作用导致 (003) 峰发生显着变化并导致 x=1/3 时的剥落。化学脱锂显示出晶体性质的连续变化。我们对脱锂材料进行了 X 射线和中子衍射。晶体分析显示脱锂样品的 c 增加,a 减少。电子显微镜显示 (x=1/3) 的纹理变化。
Progressive chemical .delithiation of commercially available lithium cobalt oxide () showed consecutive changes in the crystal properties. Rietveld refinement of high resolution X-ray and neutron diffraction revealed an increased lattice parameter c and a reduced lattice parameter a for chemically delithiated samples. Using electron microscopy we have also followed the changes in the texture of the samples towards what we have found is a critical layer stoichiometry of about with x=1/3 that causes the grains to exfoliate. The pattern of etches by delithiation suggests that unrelieved strain fields may produce chemical activity. The effect of chemical dedoping of leads to a significant change in the (003) peak and to exfoliation for x=1/3. Chemical delithiation of showed consecutive changes in crystal properties. We performed X-ray as well as neutron diffraction on delithiated material. Crystal analysis revealed an increased c and a reduced a for delithiated samples. Electron microscopy revealed changes in the texture for (x=1/3).
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