Abstract

The development of lithium rich layered oxide cathode materials with high energy density is one of the keys to improve the range of new energy vehicles. However, there are two bottlenecks in the development of this material: the voltage attenuation caused by structural transformation and the drastic decomposition of electrolyte at high voltage. In this paper, spherical Li1.2Mn0.54Co0.13Ni0.13O2 cathode material (LLO) was prepared, and the cycle performance of LLO cathode in LiBOB electrolyte with different content was compared. In addition, the effect of LiBOB electrolyte additives on lithium rich layered oxide materials was investigated. The decomposition path of LiBOB and the composition of stable CEI film were inferred by using computational chemistry and a variety of surface / interface detection methods.

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