Electrolyte and secondary battery containing the same
The present application provides an electrolyte and a secondary battery comprising the same. The electrolyte is prepared by adding a siloxane compound, a nitrile compound and an electrolyte salt with different contents into an organic solvent.
1. An electrolyte comprising: a nitrile compound and a siloxane compound,
wherein the siloxane compound is selected from one or more of the compounds represented by the following formulas:
2. The electrolyte according to claim 1 , wherein the mass percentage of the nitrile compound is 0.5 wt % to 10 wt % and the mass percentage of the siloxane compound is 0.1 wt % to 10 wt %, based on the total mass of the electrolyte.
3. The electrolyte according to claim 1 , wherein the nitrile compound is selected from one or more of the compounds represented by formula I:
wherein R 1 , R 2 and R 3 are independently selected from a group consisting of H, a nitrile group, an alkyl group comprising 1 to 10 carbon atoms, and a halogenated alkyl group comprising 1 to 10 carbon atoms.
4. The electrolyte according to claim 1 , wherein the nitrile compound is selected from one or more of the compounds represented by formula II:
wherein R 4 , R 5 and R 6 are each independently selected from a group consisting of an alkylene group comprising 0 to 5 carbon atoms, a halogenated alkylene group comprising 0 to 5 carbon atoms, an alkyleneoxy group comprising 1 to 5 carbon atoms, a halogenated alkyleneoxy group comprising 1 to 5 carbon atoms, an alkyl alkyleneoxy group comprising 1 to 5 carbon atoms and a haloalkyl alkyleneoxy group comprising 1 to 5 carbon atoms; the number of carbon atoms of R 4 , R 5 and R 6 is not 0 at the same time.
5. The electrolyte according to claim 1 , wherein the nitrile compound is selected from one or more of the compounds represented by the following formulas:
6. The electrolyte according to claim 1 , wherein the electrolyte further comprises
an electrolyte salt, wherein the electrolyte salt has a concentration of 0.5 M to 3M.
7. A secondary battery, comprising an electrolyte, wherein the electrolyte comprising: a nitrile compound and a siloxane compound, wherein the siloxane compound is selected from one or more of the compounds represented by the following formulas:
8. The secondary battery according to claim 7 , wherein the mass percentage of the nitrile compound is 0.5 wt % to 10 wt % and the mass percentage of the siloxane compound is 0.1 wt % to 10 wt %, based on the total mass of the electrolyte.
9. The secondary battery according to claim 7 , wherein the nitrile compound is selected from one or more of the compounds represented by formula I:
wherein R 1 , R 2 and R 3 are independently selected from a group consisting of H, a nitrile group, an alkyl group comprising 1 to 10 carbon atoms, and a halogenated alkyl group comprising 1 to 10 carbon atoms.
10. The secondary battery according to claim 7 , wherein the nitrile compound is selected from one or more of the compounds represented by formula II:
wherein R 4 , R 5 and R 6 are each independently selected from a group consisting of an alkylene group comprising 0 to 5 carbon atoms, a halogenated alkylene group comprising 0 to 5 carbon atoms, an alkyleneoxy group comprising 1 to 5 carbon atoms, a halogenated alkyleneoxy group comprising 1 to 5 carbon atoms, an alkyl alkyleneoxy group comprising 1 to 5 carbon atoms and a haloalkyl alkyleneoxy group comprising 1 to 5 carbon atoms; the number of carbon atoms of R 4 , R 5 and R 6 is not 0 at the same time.
11. The secondary battery according to claim 7 , wherein the nitrile compound is selected from one or more of the compounds represented by the following formulas:
12. The secondary battery according to claim 7 , wherein the electrolyte further comprises an electrolyte salt, wherein the electrolyte salt has a concentration of 0.5 M to 3 M.