SECONDARY BATTERY AND DEVICE CONTAINING SECONDARY BATTERY

The present application provides a secondary battery and an apparatus containing the same. The secondary battery includes: a negative electrode plate including a negative electrode current collector and a negative electrode film disposed on at least one surface of the negative electrode current collector, the negative electrode film including a negative active material; and an electrolyte including an electrolyte salt, an organic solvent, and an additive; wherein the negative active material includes a silicon-based material; the additive includes an additive A and an additive B; the additive A is selected from one or more of the compounds shown in Formula 1; the additive B is selected from one or more in the compound shown in Formula 2; the additive B has melting point of below or equal to 5°C. The secondary battery of the present application and the apparatus containing the secondary battery can have better high-temperature cycle performance, high-temperature storage performance and low-temperature discharge performance at the same time.; NC-R2-CN Formula 2