A lithium ion secondary battery and a method for preparing the same are provided. The lithium ion secondary battery includes a positive electrode having a positive active material represented by Formula (1), a negative electrode and an electrolyte, wherein...

Provided are a lithium manganese oxide positive active material for a lithium ion secondary battery and a lithium ion secondary battery including the same. The lithium manganese oxide positive active material includes a spinel lithium manganese oxide of th...

Provided are a multi-layered structure electrolyte including a gel polymer electrolyte on opposite surfaces of a ceramic solid electrolyte, for a lithium ion secondary battery including positive and negative electrodes capable of intercalating/deintercalat...

The present invention refers to a positive active material including a spinel lithium manganese oxide surface-coated with one or more types of nanoparticles selected from olivine-type lithium metal phosphate and metal oxide, a method of preparing the same ...

An additive for overcharge prevention of a lithium ion battery is provided. A non-aqueous electrolyte for a lithium ion battery including a lithium salt and an organic solvent is also provided, which includes both a terphenyl derivative and a xylene deriva...