fig12

Figure 12. (A) Charge-discharge curves and electrochemical performance of LRMO materials under different voltage systems. (i) Initial two cycles of charge-discharge curves under the condition of Vr-1 (tested between 2.0 and 4.8 V). (ii) Initial four cycles of charge-discharge curves under the condition of Vr-8 (pre-cycled at 2.0 to 4.5 V for two cycles and tested between 2.0 and 4.6 V). (iii and iv) Cycle performance of materials under Vr-1 and Vr-8, respectively^[110]. (B) Initial charge-discharge curves (i), the evolution of TM occupancy in Li layer (ii) and two-phase content by Rietveld refinement (iii) for Li_1.2Mn_0.567Ni_0.167Co_0.078O₂ at 25 and 55 °C^[93]. LRMO: Lithium-rich manganese-based layered oxide.