The rivet effect: a new insight into improving structural stability in Mg-doped Ni-rich single-crystal layered oxide cathodes for Li-ion batteries

In this study, using the Mg-doped single crystal NMC622 as model systems, we suggest a new “rivet” effect of Mg-doping that prevents O3-to-O1 transition, accompanying tensile strain and intragranular crack initiation during electrochemical cycling.