Quantitative MAS NMR characterization of the LiMn1/2Ni1/2O2 electrode/electrolyte interphase

In agreement with the electrochemical performance, quantitative NMR surface analyses show that the use of LiBOB-modified electrolyte results in a Li-enriched interphase, intrinsically less resistive than the standard LiPF6-based interphase, comprised of a mixture of resistive LiF with non lithiated species.