context: Li-ion batteries (LIBs) are expected to have a cell-level specific capacity of >350 W h kg−1 by 2025 to meet the market demanded driving range of an electric vehicle (EV). Among the state-of-the-art cathode materials, Ni-rich layered oxides, LiNixCoyAlzO2 (NCA) and LiNixCoyMnzO2 (NCM) with x + y + z = 1 and x ≧ 0.8, have an unbeatable high capacity of ∼200 mA h g−1.
answer: Ni-rich layered oxides, LiNixCoyAlzO2 (NCA) and LiNixCoyMnzO2 (NCM)