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Yonghyun Cho, Sanghan Lee, Yongseok Lee, Taeeun Hong and Jaephil Cho Spinel-Layered Core-Shell Cathode Materials for Li-Ion Batteries Advanced Energy Materials 1

Article first published online: 19 JUL 2011 | DOI: 10.1002/aenm.201100239

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A high-energy Li[Ni0.54Co0.12Mn0.34]O2 cathode material with two heterostructures, consisting of a layered core phase and a spinel shell phase, was developed using a PVP-functionalized coating of a Mn precursor on Li[Ni0.7Co0.15Mn0.15]O2. This material demonstrates a reversible capacity of 200 mA h g−1 and an excellent cycling and rate capability at 60 °C. Most importantly, this material with two heterostructures demonstrates substantially reduced heat generation compared to Li[Ni0.5Co0.2Mn0.3]O2.

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