Secondary battery and power consumption unit

Abstract

Secondary battery comprising a positive electrode plate with a positive current collector and a positive electrode material on at least one surface of the positive current collector, wherein the positive electrode material contains a positive active material with LNMO particles, wherein the secondary battery corresponds to formula 6 ≤ b·c ≤45, where b% represents a constant current component for charging at 45 °C with 1C as the charging rate, where c% is the sum of the leaching degrees of nickel and manganese ions after a 72-hour storage of the positive electrode material in a hydrofluoric acid solution at 70 °C.