The present disclosure relates to the field of energy storage materials, and particularly, to an electrolyte and an electrochemical device. The electrolyte includes an additive A and an additive B, the additive A is selected from a group consisting of multi-cyano six-membered N-heterocyclic compounds represented by Formula I-1, Formula I-2 and Formula I-3, and combinations thereof, and the additive B is at least one unsaturated bond-containing cyclic carbonate compound. The electrochemical device includes the above electrolyte. The electrolyte of the present disclosure can effectively passivate surface activity of the positive electrode material, inhibit oxidation of the electrolyte, and effectively reduce gas production of the battery, while an anode SEI film can be formed to avoid a contact between the anode and the electrode and thus to effectively reduce side reactions.
本公开涉及能源存储材料领域,特别是涉及一种电解质和一种电
化学装置。该电解质包括添加剂A和添加剂B,其中添加剂A选自由式I-1、式I-2和式I-3所代表的多
氰基六元
杂环化合物组成的一组,以及它们的组合物,添加剂B是至少一种含有不饱和键的环状
碳酸酯化合物。所述电
化学装置包括上述电解质。本公开的电解质可以有效地钝化正极材料的表面活性,抑制电解质的氧化,并有效地减少电池的气体产生,同时可以形成阳极
SEI膜,以避免阳极与电极之间的接触,从而有效地减少副反应。