Enhancing the high-voltage electrochemical performance of the LiNi0.5Co0.2Mn0.3O2 cathode materials via hydrothermal lithiation
Source abstract
Abstract
The chemical lithiated transition metal oxide precursor has been prepared via a hydrothermal process and successfully used for preparing the LiNi0.5Co0.2Mn0.3O2 cathode materials by the post-heat treatment. The results indicate that the lithiated transition metal oxide precursor inherits the morphology of the Ni0.5Co0.2Mn0.3(OH)2 precursor but has a typical α-NaFeO2-type (space group: R-3 m) layered structure with an imperfect crystallinity, and the Li is homogenously distributed in the particles. It is further confirmed that the obtained LiNi0.5Co0.2Mn0.3O2 cathode material has a suppressed cation mixing resulting in an excellent electrochemical performance. It delivers the high initial capacity of 187.3 mAhg−1 at 1 C over the high cutoff voltage range of 3.0–4.6 V and the excellent capacity retention of 81.90% after 100 cycles as well as the rate capability of 152.3 mAhg−1 at 8 C, which are attributed to the low polarization, fast Li+ diffusion and small charge–discharge resistance of the as-prepared material upon cycling.
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Research context
OpenAlex topics: Advancements in Battery Materials · Advanced Battery Materials and Technologies · Supercapacitor Materials and Fabrication
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