▎ 摘　　要

NOVELTY - Cathode comprises a current collector and an electrode layer coated on one side or both sides of the current collector, where the electrode layer comprises a cathode active material, a binder material and a lithium compound. USE - The cathode is used for a secondary battery such as lithium-ion batteries and other metal-ion batteries. ADVANTAGE - The cathode utilizes aqueous solvents instead of organic solvents for environmental reasons and easier handling. The cathode and cathode slurry reduce or eliminate the irreversible lithium ion loss derived from solid-electrolyte interphase formation, are capable of compensating for the irreversible lithium ion loss to achieve an increase in specific capacity of the batteries and contribute to remarkable battery electrochemical performance. Pores in the cathode helps facilitate electrolyte penetration and provide diffusion paths for Li + transport through the electrolyte. The small pore size within the cathode significantly increases the surface area of the cathode and reduces the diffusion pathway of the lithium ions into the cathode, and enabling more effective charge transfer across the cathode-electrolyte interface. The resulting uniform pore size within the cathode provides an optimal open volume for best mass transport and permits efficient electrolyte distribution. An even pore distribution in the cathode reduces the region (s) of the cathode where lithium ion cannot reach and results in full utilization of the cathode. The cathode of the present invention after undergoing initial charging yields a morphological structure of a small and uniform pore size with an even pore distribution which can ensure improved insertion and extraction of lithium ion with a reduced diffusion pathway and lead to an enhanced electrochemical performance. The preparation method of cathode has the advantage that aqueous solvents used in the manufacturing process, which saves on processing time and equipment, and improves safety by eliminating the need to handle or recycle hazardous organic solvents. The method reduces costs by simplifying the overall process, and is suitable for industrial processes because of low cost and ease of handling. Along with the presence of lithium compound in the cathode or cathode slurry having a negligible resistance within the system and providing an even pore distribution within the cathode upon initial charging due to the high solubility of lithium compound in aqueous solvent, the lithium compound serves as a lithium ion source in compensating the irreversible capacity loss in lithium-ion batteries and forms removable gaseous products upon decomposition. The lithium-ion battery cells exhibit exceptional electrochemical performance. The other metal-ion batteries may use other metal compounds matching their corresponding cell chemistry to provide comparable effect in compensating for the irreversible capacity loss. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a cathode slurry for a secondary battery, comprising a cathode active material, a binder material, a lithium compound and an aqueous solvent.