High-Rate Capability of Lithium-Rich Layered Li1.2Ni0.18Mn0.59Co0.03O2 Cathode Material Prepared from Size-Regulated Precursor Fine Particles

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A lithium-rich layered cathode material, Li1.2Ni0.18Mn0.59Co0.03O2, was synthesized from size-regulated precursor nanoparticles, which were prepared by a reverse microemulsion technique. The resulting material demonstrated a good cycle stability (50th cycle discharge capacity: 281 mAh g−1 at 20 mA g−1) without any additional modifications or treatments and a high capacity retention (52%) even at 640 mA g−1 compared to the one (5% at 640 mA g−1) obtained via a spray-drying synthesis as a reference. This article is the first report of trying to synthesize a lithium-rich layered cathode material having a high rate capability by controlling the morphology and homogeneity of the precursor particles based on a reverse microemulsion technique.
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