SECONDARY BATTERY AND APPARATUS CONTAINING THE SECONDARY BATTERY

This application discloses a secondary battery and an apparatus containing the secondary battery. The secondary battery includes a positive electrode plate and a negative electrode plate, the positive electrode plate comprises a positive electrode current collector and a positive electrode film disposed on at least one surface of the positive electrode current collector and comprising a positive active material, the negative electrode plate comprises a negative electrode current collector and a negative electrode film disposed on at least one surface of the negative electrode current collector and comprising a negative active material. The negative active material comprises a first material and a second material, the first material comprises artificial graphite, the second material comprises natural graphite. The positive active material comprises one or more of layered lithium transition metal oxides and modified compounds thereof, and a resistance R of the negative electrode plate satisfies: 6.0 mQ ≤ R ≤ 12.0 mΩ; or the positive active material comprises one or more of lithium-containing phosphates with olivine structure and modified compounds thereof, and a resistance R of the negative electrode plate satisfies: 3.0 mQ ≤ R ≤ 7.0 mΩ.