▎ 摘　　要

NOVELTY - Lithium ion electrochemical cell comprises a negative electrode (5), a positive electrode (1), and an electrolyte, where negative electrode comprises a layered composite comprising a first composite layer (7) of copper or a copper-alloy and a first active layer (6) of one of aluminum, an aluminum-alloy, an aluminum/lithium-alloy, tin or its alloy, silicon or its alloy, and the layers of the layered composite are diffusion bonded to each other. The lithium ion cell further comprises a separator mechanically separating the negative electrode from the positive electrode, where the separator is a polymeric membrane with pore sizes in the range of micrometres made of either a polyethylene, polypropylene or a polyethylene/polypropylene. The electrolyte is a solid electrolyte, preferably poly(ethylene oxide) complexed with alkali metal ion with or without addition of lithium salt, lithium orthosilicate, glass, sulfide, or rubidium silver iodide. USE - The cell is useful in portable electronics, tools and transportation vehicles. ADVANTAGE - The cell has high energy density and high delivering capacity of electric effect. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for producing a negative electrode for a lithium ion cell. DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of the lithium ion electrochemical cell. 1Positive electrode 2First layer 5Negative electrode 6First active layer 7First composite layer