Abstract
LiNi0.5Mn1.5O4 is one of the promising cathode materials for high-energy Li-ion batteries. The development of a low-cost and environmental-friendly synthetic method of the LiNi0.5Mn1.5O4 powder is an important topic for large scale production. In this paper, we have prepared LiNi0.5Mn1.5O4 granules consisting of nanoparticles by a simple mechanical method using an attrition-type mill. The formation mechanism of LiNi0.5Mn1.5O4 granules was investigated from the powder properties of products prepared during the mechanical treatment of starting materials. The initial step of this formation reaction is a pulverization of starting materials. With increasing treatment time, the nano-sized LiNi0.5Mn1.5O4 particles are formed and then these particles are granulated with the size of few micrometers. The charge and discharge properties of cathodes made from the prepared LiNi0.5Mn1.5O4 granules were also tested. The present work may lead to the development of a scalable synthetic method of high-purity powders by the simple mechanical process at room temperature.
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