Electrode slurry, electrode containing the same, lithium secondary battery, and battery pack

Abstract

This specification relates to an electrode slurry, an electrode containing the slurry, a lithium secondary battery, and a battery pack, comprising an electrode active material, a conductive material, a binder, a solvent for slurry formation, and a flame retardant material, wherein the flame retardant material has a solubility of less than 10 mg / cc in a carbonate-based solvent at 20°C and contains a specific type of compound. The electrode according to the above embodiment can ensure battery characteristics while preventing thermal runaway.

Claims

1. It comprises an electrode active material, a conductive material, a binder, a solvent for slurry formation, and a flame retardant material. The aforementioned flame-retardant material has a solubility of less than 10 mg / cc in a carbonate-based solvent at 20°C. The flame-retardant material is an electrode slurry containing a linear or branched polyphosphate compound.

2. The electrode slurry according to claim 1, wherein the linear or branched polyphosphate compound comprises at least one of ammonium and halogen.

3. The electrode slurry according to claim 1, wherein the content of the flame-retardant material is 1 part by weight or more and 20 parts by weight or less per 100 parts by weight of the total electrode slurry.

4. The electrode slurry according to claim 1, wherein the conductive material is at least one of a planar conductive material, a linear conductive material, and a point conductive material.

5. The electrode slurry according to claim 1, wherein the binder is an aqueous binder or a non-aqueous binder.

6. Electrode current collector layer, An electrode active material layer having the electrode slurry described in any one of claims 1 to 5 applied to one or both sides of the electrode current collector layer, Electrodes, including

7. It includes a first electrode, a second electrode, a separation membrane interposed between the first electrode and the second electrode, and an electrolyte. A lithium secondary battery in which at least one of the first electrode and the second electrode is the electrode described in claim 6.

8. The lithium secondary battery according to claim 7, wherein the electrolyte comprises a solvent, a salt, and an additive.

9. The lithium secondary battery according to claim 7, wherein the electrolyte comprises a carbonate-based solvent.

10. A battery pack comprising the lithium secondary battery described in claim 7 as a unit cell.

Images