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US 2026/0066348 A1Published application
Non-aqueous electrolyte and lithium secondary battery
AssigneeNingde Amperex Technology Limited
InventorsJunhua JIAN, Lilan ZHANG, Jianyu LIU, Chao TANG
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Abstract
A non-aqueous electrolyte includes vinylene carbonate and Formula I compound, where based on a total mass of the non-aqueous electrolyte, a mass percentage of vinylene carbonate is A %, where 0.01≤A≤3; a mass percentage of a compound of Formula I is B %; and P=B/A, where 0.5≤P≤50.
Claims20
A non-aqueous electrolyte, wherein the non-aqueous electrolyte comprises vinylene carbonate and a compound of Formula I:
- wherein R is selected from an unsubstituted or Ra-substituted C2 to C6 alkyl group, an unsubstituted or Ra-substituted C2 to C6 alkenyl group, an unsubstituted or Ra-substituted C2 to C6 alkynyl group, an unsubstituted or Ra-substituted C5 to C12 nitrogen-containing heteroaryl group, or an unsubstituted or Ra-substituted C6 to C12 aryl group, wherein the substituent Ra of each group is independently selected from fluorine or a C1 to C6 fluoroalkyl group;
- based on a total mass of the non-aqueous electrolyte, a mass percentage of vinylene carbonate is A %, wherein 0.01≤A≤3;
- and a mass percentage of the compound of Formula I is B %;
- and
- P
- =
- B
- /
- A
- ,
- and
- 0.5
- ≤
- P
- <
- ¯
- 5
-
- 0
- .
17 more elements
A lithium secondary battery, comprising:
- a positive electrode, wherein the positive electrode comprises a positive electrode current collector and a positive electrode active layer disposed on at least one surface of the positive electrode current collector;
- a negative electrode, wherein the negative electrode comprises a negative electrode current collector and a negative electrode active layer disposed on at least one surface of the negative electrode current collector;
- a separator;
- and
- a non-aqueous electrolyte, wherein the non-aqueous electrolyte comprises vinylene carbonate and a compound of Formula I:
- wherein R is selected from an unsubstituted or Ra-substituted C2 to C6 alkyl group, an unsubstituted or Ra-substituted C2 to C6 alkenyl group, an unsubstituted or Ra-substituted C2 to C6 alkynyl group, an unsubstituted or Ra-substituted C5 to C12 nitrogen-containing heteroaryl group, or an unsubstituted or Ra-substituted C6 to C12 aryl group, wherein the substituent Ra of each group is independently selected from fluorine or a C1 to C6 fluoroalkyl group;
- based on a total mass of the non-aqueous electrolyte, a mass percentage of vinylene carbonate is A %, wherein 0.01≤A≤3;
- and a mass percentage of the compound of Formula I is B %;
- and
- P
- =
- B
- /
- A
- ,
- and
- 0.5
- ≤
- P
- <
- ¯
- 5
-
- 0
- .
22 more elements
Dependencies are inferred from the claim text.