▎ 摘　　要

NOVELTY - The electrode has a positive electrode active material layer formed on a surface of a positive electrode current collector. The positive electrode active material layer includes a lower layer formed on the surface of the current collector and an upper layer formed on an upper surface of the lower layer. The upper layer is made of silver and formed with a first positive electrode active material, a conductive material and a binder resin. The lower layer is formed with a second positive electrode active material, a sacrificial positive electrode material, a conductive material and a binder resin. The active materials are each independently represented by a specific equation, where the electrode is made of compounds selected from a group consisting of manganese, cobalt, aluminum, copper and iron and formed in a lithium ion secondary battery that is made of single-wall and multi-walled carbon CNTs and graphene. USE - Positive electrode for a lithium ion secondary battery (claimed) in electric vehicles, portable electronic devices and power storage systems. Uses include but are not limited to hybrid electric vehicles (HEVs), plug-in hybrid electric vehicles (PHEVs), electric bicycles, electric scooters, electric golf carts, notebook computers, mobile phones, digital cameras and a camcorders. ADVANTAGE - The electrode provides binder distribution uniformly in electrode active material layer thickness direction by applying double-layer coating process such that the binder resin of the lower layer of the positive electrode active material layer is maintained in the lower layer, so that binding force is improved. The electrode allows a sacrificial negative electrode material to be added to the lower layer, thus improving electro-chemical properties of the battery by varying composition of a cathode material in the upper and lower layers. The electrode uses lithium cobalt oxide in which a part of cobalt in the electrode is substituted with zinc as a sacrificial positive electrode material to supplement irreversible capacity of the battery when the lithium cobalt oxide serves as a gas scavenger, thus reducing an amount of gas generated inside the battery. The electrode is provided for the battery with the lithium composite oxide having a high nickel content as a positive electrode active material, so that capacity of the battery is increased. The electrode secures electrical conductivity of a negative electrode to a sufficient degree for driving the battery. DESCRIPTION OF DRAWING(S) - The drawing shows a graphical representation of charging capacity for each parking of a lithium ion secondary battery.