Fig. 3. Electrochemical performance of Gr-coated NCA cathodes.

a Rate capability of the Gr-coated and bare electrodes at 0.1–5 C. b Relationship between the peak current (i_p) and the square root of the scan rate (ν^1/2) for lithiation/delithiation. c Discharge capacity of the Gr-coated and bare NCA electrodes, measured at 60 °C in the voltage range of 2.75–4.3 V vs. Li⁺/Li at 0.5 C. The bare and Gr-coated electrodes have different electrode parameters of φ = 96:2:2 vs. φ = 99.5:0:0.5 and ρ ~3.3 g cm⁻³ vs. ρ ~3.9 g cm⁻³. d Areal capacity of full cells made with the NCA cathode and graphite anode during 300 cycles, measured at 30 °C in the voltage range of 2.75–4.2 V at 0.5 C.