Electrochemical Device Comprising Aliphatic Nitrile Compound
AssigneeLG Chem, Ltd.
InventorsYoung Soo KIM, Soon Ho AHN
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Abstract
The present invention provides a cathode having a protection layer formed by a complex between the surface of a cathode active material and an aliphatic nitrile compound, as well as an electrochemical device comprising the cathode. Also, the present invention provides an electrochemical device comprising: (1) a cathode having a protection layer formed by a complex between the surface of a cathode active material and an aliphatic nitrile compound; (2) an anode having a passivation layer formed by a compound selected from the group consisting of vinylene carbonate, its derivative and an ether compound; and (3) an electrolyte solution containing a lithium salt and a solvent.
Claims4
A method for preparing a cathode, which comprises:
- immersing a cathode comprising a cathode active material applied on a collector in an electrolyte solution comprising an aliphatic nitrile compound;
- and
- treating the immersed cathode at a temperature of 60-90° C. to form a protection layer formed by a complex between the surface of the cathode active material and the aliphatic nitrile compound.
Dependencies are inferred from the claim text.