The paper presents a novel approach to enhance the mechanical and electrochemical stability of Ni-rich cathode materials, which are crucial for high-energy power batteries in electric vehicles (EVs). The researchers propose a concentration gradient structure, where the core is Ni-rich and the surface is Mn-rich. This structure improves the mechanical strength of the secondary particles due to the radially oriented primary particles, which effectively alleviate internal strain caused by structural changes and fatigue during cycling. The Mn-rich surface also minimizes parasitic side reactions at the electrode-electrolyte interface. The concentration gradient sample demonstrates superior performance, delivering a capacity of approximately 180.1 mA h−1 at 1 C and retaining 96.2% of its initial capacity after 100 cycles. The study highlights the importance of element distribution in enhancing electrochemical stability and provides a feasible method for designing stable lithium-ion batteries with high energy density.The paper presents a novel approach to enhance the mechanical and electrochemical stability of Ni-rich cathode materials, which are crucial for high-energy power batteries in electric vehicles (EVs). The researchers propose a concentration gradient structure, where the core is Ni-rich and the surface is Mn-rich. This structure improves the mechanical strength of the secondary particles due to the radially oriented primary particles, which effectively alleviate internal strain caused by structural changes and fatigue during cycling. The Mn-rich surface also minimizes parasitic side reactions at the electrode-electrolyte interface. The concentration gradient sample demonstrates superior performance, delivering a capacity of approximately 180.1 mA h−1 at 1 C and retaining 96.2% of its initial capacity after 100 cycles. The study highlights the importance of element distribution in enhancing electrochemical stability and provides a feasible method for designing stable lithium-ion batteries with high energy density.