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LiNi0.5Co0.2Mn0.3O2 (523) coated with ~ 20nm thick Y2O3 nano-membrane is prepared via a sol-type chemical precipitation process based on electrostatic attraction between the materials. The nano-Y2O3-coated 523 cathode can deliver 160.3mAhg−1 (87.8% of its initial discharge capacity) after 50 cycles at 1C (180mAg−1) between 3.0 and 4.6V by coin cell testing, while the pristine 523 keeps only 146.2mAhg...
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