Abstract: The present invention provides an electrolyte solvent for batteries, which comprises fluoroethylene carbonate and linear ester solvent. Also, the present invention provides a lithium secondary battery comprising a positive electrode, a negative electrode and an electrolyte, wherein the electrolyte comprises fluoroethylene carbonate and linear ester solvent. The inventive electrolyte solvent can improve the battery safety without deteriorating the battery performance.

Abstract: The present invention provides an electrolyte for lithium secondary batteries that allows the batteries to operate safely at a charging voltage up to 4.35V, wherein the electrolyte comprises a combination of a fluoroethylene carbonate compound and a linear ester compound as solvent. Also, the present invention provides a lithium secondary battery that can operate at a charging voltage up to 4.35V, which comprises a positive electrode, a negative electrode and an electrolyte, wherein the electrolyte comprises fluoroethylene carbonate compound and linear ester compound as solvent.

Abstract: The present invention provides an electrolyte solvent for batteries, which comprises fluoroethylene carbonate and linear ester solvent. Also, the present invention provides a lithium secondary battery comprising a positive electrode, a negative electrode and an electrolyte, wherein the electrolyte comprises fluoroethylene carbonate and linear ester solvent. The inventive electrolyte solvent can improve the battery safety without deteriorating the battery performance.

Abstract: The present invention provides an electrolyte solvent for batteries, which comprises fluoroethylene carbonate and linear ester solvent. Also, the present invention provides a lithium secondary battery comprising a positive electrode, a negative electrode and an electrolyte, wherein the electrolyte comprises fluoroethylene carbonate and linear ester solvent. The inventive electrolyte solvent can improve the battery safety without deteriorating the battery performance.

Abstract: The present invention provides an electrolyte solvent for batteries, which comprises fluoroethylene carbonate and linear ester solvent. Also, the present invention provides a lithium secondary battery comprising a positive electrode, a negative electrode and an electrolyte, wherein the electrolyte comprises fluoroethylene carbonate and linear ester solvent. The inventive electrolyte solvent can improve the battery safety without deteriorating the battery performance.

Abstract: The present invention provides an electrolyte solvent for batteries, which comprises fluoroethylene carbonate and linear ester solvent. Also, the present invention provides a lithium secondary battery comprising a positive electrode, a negative electrode and an electrolyte, wherein the electrolyte comprises fluoroethylene carbonate and linear ester solvent. The inventive electrolyte solvent can improve the battery safety without deteriorating the battery performance.

Abstract: The present invention provides an electrolyte for lithium secondary batteries that allows the batteries to operate safely at a charging voltage up to 4.35V, wherein the electrolyte comprises a combination of a fluoroethylene carbonate compound and a linear ester compound as solvent. Also, the present invention provides a lithium secondary battery that can operate at a charging voltage up to 4.35V, which comprises a positive electrode, a negative electrode and an electrolyte, wherein the electrolyte comprises fluoroethylene carbonate compound and linear ester compound as solvent.

Abstract: The present invention relates to an anode material for a battery and a preparation method thereof, and particularly to surface-treated carbon that has a large capacity and superior room temperature and high temperature cycle life properties, and that comprises a carbon core and a coating layer containing a fluorine-type organometal salt, and thus can be used as an anode material for a battery; and a preparation method thereof. A lithium or lithium ion secondary battery comprising the surface-treated carbon as an anode material has improved high temperature cycle life properties and stability.