Understanding structural defects in lithium-rich layered oxide cathodes
Abstract
Planar defects in lithium-rich layered m state to a lithium-ordered C2/m state. This disorder-to-order transition resulted in three orientation variants, namely [100], [110], and [1
0]. The fundamental mechanism behind the observed defects is a shear of ±b/3[010] on the (001) transition metal planes, which is equivalent to the point group operations lost during the disorder-to-order transition. These displacements also produced twins and single unit cells with P3112 symmetry. Lithium-rich layered