Fig. 3. (a) Initial charge and discharge curves at 0.1C rate and (b) cycling performance of LiNi_0.9Co_0.07Mg_0.03O₂ and NCM811 at 2C rate for 300 cycles. (c) LiNi_0.9Co_0.07Mg_0.03O₂ performance at a temperature of –5 and 60 °C at 1C. (d) Charge/discharge profiles of the full LIB cell assembled with the LiNi_0.9Co_0.07Mg_0.03O₂ cathode and graphite anode. The inset shows a cell powering a string of LIB-shaped LED lights.