Electrolyte and electrochemical device
AssigneeContemporary Amperex Technology Co., Limited
InventorsTiancheng Yi, Chunhua Hu, Lu Miao, Zijun Xu, Chengdu Liang
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Abstract
This application provides an electrolyte and an electrochemical device, wherein the electrolyte comprises an additive A and an additive B, the additive A is present in an amount of 0.001% to 10% by mass in the electrolyte, and the additive B is present in an amount of 0.1% to 10% by mass in the electrolyte. This application can improve the cycle performance and storage performance of the electrochemical device, especially the cycle performance and storage performance of the electrochemical device under high temperature and high voltage conditions.
Claims11
An electrolyte, wherein the electrolyte comprises an additive A and an additive B;
- and
- wherein the additive A is one or more selected from the group consisting of the following compounds:
- and
- wherein the additive B is selected from a sulfonimide lithium salt represented by Formula II;
- in Formula II, RF is one of Cp1F2p1+1 and F(CF2CF2O)q1CF2CF2, Rf is one of Cp2F2p2+1 and F(CF2CF2O)q2CF2CF2, p1 and p2 are each independently selected from an integer of 0 to 8;
- and q1 and q2 are each independently selected from an integer of 1 to 6
- wherein the electrolyte comprises the additive A in an amount of 0.001% to 10% by mass of the electrolyte;
- wherein the electrolyte comprises the additive B in an amount of 0.1% to 10% by mass of the electrolyte.
Dependencies are inferred from the claim text.