SECONDARY BATTERY AND ELECTRONIC DEVICE

The invention relates to a secondary battery and an electronic device. The secondary battery comprises a positive electrode plate, the positive electrode plate comprises a positive electrode active material layer, the positive electrode active material layer comprises a positive electrode active material, a conductive agent and a phosphorus-containing additive, the positive electrode active material is selected from lithium iron phosphate and/or lithium manganate, and based on the mass of the positive electrode active material layer, the conductive agent is selected from lithium iron phosphate and/or lithium manganate. The mass content of the phosphorus-containing additive is 0.01%-0.1%. The phosphorus-containing additive is introduced into the lithium iron phosphate and/or lithium manganate positive electrode system, so that the cycle performance and the capacity of the secondary battery comprising the positive electrode active material can be effectively improved. 本申请涉及一种二次电池和电子装置。本申请的二次电池包括正极极片，所述正极极片包括正极活