The cathode material Li 1.5 Ni 0.25 Mn 0.75 O 2.5 was synthesized through a solid-state reaction. In-situ high energy X-ray diffraction, STEM and electrochemical characterizations confirmed the composite nature of the material. We mainly found that the layered components belonging to the and C2/m like-phases formed stepwise following the thermal decomposition and reaction of Li 2 CO 3 . Solid diffusion at high-temperature with extended calcination times cannot change the composite nature.
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Wang et al. (2013) studied this question.
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