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A uniform Co3O4 layer is coated on nickel-rich cathode material LiNi0.6Co0.2Mn0.2O2 via a facile polyvinyl pyrrolidone (PVP)-assisted wet coating process. The 1wt.% Co3O4-coated LiNi0.6Co0.2Mn0.2O2 shows improved electrochemical performance, especially the cycling stability, at high cut-off voltage of 4.6V. Its highly continuous and compact coating layer is confirmed by scanning electron microscopy...
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