A Simple Dual-Ion Doping Method for Stabilizing Li-Rich Materials and Suppressing Voltage Decay

A gentle method is used to treat the precursor to induce the doping of SO42- and Ni2+. The doped SO42- induces the formation of oxygen vacancies and defects, which are beneficial for inhibition of the loss of O2-, stabilization of the structure, and amelioration of voltage decay, and the doped Ni2+ increases the degree of lithium nickel mixing and significantly increases the midvoltage. After modification, the specific discharge capacity reaches...