Insights into the effects of coating and single crystallization on the rate performance and cycle life of LiNiMnO cathode.

Coating and single crystal are two common strategies for cobalt-free nickel-rich layered oxides to solve its poor rate performance and cycle stability. However, the action mechanism of different modification protocols to suppress the attenuation are unclear yet. Herein, the LiMoO layer-coated polycrystalline LiNiMnO (1.

Analyzing the Mechanism of Functional Groups in Phosphate Additives on the Interface of LiNiCoAlO Cathode Materials.

The design of a functional electrolyte system that is compatible with the LiNiCoAlO (LNCA) cathode is of great importance for advanced lithium-ion batteries (LIBs). In this work, chelated lithium salts of lithium difluoro(bisoxalato) phosphate (LiDFBOP) and lithium tetrafluoro(oxalate) phosphate (LTFOP) are synthesized by a facile and general method. Then, the complexes of LiDFBOP, LTFOP, and lithium difluorophosphate (LiDFP), all of which have a central phosphorus atom, were selected as the salt-type additives for the LiPF-based electrolyte to improve the electrochemical performances of LNCA/Li half-batteries, respectively.