Secondary battery and electronic device

The invention provides a secondary battery and an electronic device, the secondary battery comprises a positive pole piece, a negative pole piece and an electrolyte, the electrolyte comprises vinylene carbonate, and based on the total mass of the electrolyte, the mass percentage a of the vinylene carbonate is 0.1-3%; the positive pole piece comprises a positive active material, the positive active material comprises a carbon element, and based on the total mass of the positive active material, the mass percentage b of the carbon element is 0.5-6%. The secondary battery provided by the invention meets the characteristics, so that the secondary battery has excellent dynamic performance while having relatively good cycle performance and storage performance. 本申请提供了一种二次电池和电子装置，二次电池包括正极极片、负极极片和电解液，电解液包括碳酸亚乙烯酯，基于电解液的总质量，碳酸亚乙烯酯的质量百分含量a为0.1％至3％；正极极片包括正极活性材料，正极活性材料包括碳元素，基于正极活性材料的总质量，碳元素的质量百分含量b为0.5％至6％。本申请提供的二次电池满足上述特征，使二次电池在具有较好的循环性能和存储性能的同时，还具有优良的动力学性能。