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Abstract：
In this work, core and core-shell microparticles formed by Ni-Mn-Co oxides with controlled composition were fabricated by an oxalate-assisted co-precipitation route, and their properties were analysed by diverse microscopy and spectroscopy techniques. The microparticles exhibit dimensions within the 2-6 μm range and mainly consist of NiO and NiMn2O4, the latter being promoted as the temperature of the treatment increases, especially in the shell region of the microparticles. Aspects such as the shell dimensions, the vibrational modes of the spinel compounds primarily observed in the shell region, the oxidation states of the cations at the surface of the microparticles, and the achievement of a Ni-rich 811 core and a Mn-rich 631 shell were thoroughly evaluated and discussed in this work.
摘要：
在这项工作中,由具有受控组成的Ni-Mn-Co氧化物形成的核和核-壳微粒通过草酸盐辅助共沉淀法制备，并通过各种显微镜和光谱学技术分析了它们的特性。微粒的尺寸在2-6μm范围内，主要由NiO和NiMn2O4组成，后者随着处理温度的升高而得到促进。特别是在微粒的壳区域。诸如外壳尺寸等方面，主要在壳区观察到的尖晶石化合物的振动模式，微粒表面阳离子的氧化态，在这项工作中，对富含Ni的811核和富含Mn的631壳的实现进行了全面评估和讨论。
