Abstract
was synthesized from and mixed hydroxide. Four different coprecipitation routes were used to prepare the precursor beginning with divalent metal nitrates or metal sulfates. When ammonia was added during the coprecipitation under anaerobic conditions, spherical and dense particles of were prepared. The impact of various coprecipitation methods on the subsequent properties of was studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), and electrochemical tests. Spherical and dense particles of showed an excellent charge–discharge cycle life at 4.6 V. The impact of heating temperature and time on the properties of was also studied by XRD, SEM, and electrochemical tests and suggested that the heating temperature plays a significant role in determining the electrochemical performance of . Accelerating rate calorimetry results suggest that is less thermally stable than .
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