Component-Selective Passivation of Li Residues of Ni-Based Cathode Materials by Chemical Mimicry of Solid Electrolyte Interphase Formation

초록

A new treatment method is proposed for the Li residues in Ni-based cathode materials for lithium ion batteries. The method passivates the Li residues by converting them into a protective coating layer. The coating layer is controllable as a composite of LiF nanoparticles and a thin film. The selective removal of the most problematic LiOH component is achieved. Thus, the method not only passivates the Li residues but also can flexibly control both the chemistry and morphology of the resulting coating layer, enabling optimized performance from Ni-based cathodes. The simple and cost-effective process is readily applicable to commercial production.

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