NOVELTY - A lithium ion secondary cell has R-value of Raman spectrum when exciting negative electrode active material with argon laser of wavelength of 514.5 nm of 0.3-0.8, face distance (d002) of 002nd face containing carbon material of 0.34 nm or less, laminated component as separators which has porous resin layer (A) having melting point of 120-140 degrees C, porous resin layer (B) having allowable temperature limit of 150 degrees C or more, or porous layer having melting point of 150 degrees C or more and containing essentially inorganic particles.    USE - Lithium ion secondary cell is used for electric equipments, motor vehicles, power tools, electric chairs, electric power storage systems used for domestic and business applications, used as power supply of portable apparatuses such as mobile telephones and notebook-type personal computers.    ADVANTAGE - The lithium ion secondary cell has improved cycle life, reliability, maintains stable characteristic for a long period of time, and reduced deterioration characteristic by charging and discharging by heavy current.    DETAILED DESCRIPTION - A lithium ion secondary cell has a negative electrode having cathode-mix layer containing negative electrode active material, a positive electrode having anode-mix layer containing positive electrode active material, a separator, and an non-aqueous electrolyte. A R-value of Raman spectrum when exciting the negative electrode active material with argon laser of wavelength of 514.5 nm is 0.3-0.8. Face distance (d002) of 002nd face containing carbon material is 0.34 nm or less. The content of carbon material in negative electrode material is 60 wt.% or more. The cathode-mix layer has density of 1.4-1.6 g/cm3. The separators are laminated component which has porous resin layer (A) having melting point of 120-140 degrees C, porous resin layer (B) having allowable temperature limit of 150 degrees C or more, or porous layer having melting point of 150 degrees C or more and containing essentially inorganic particles. The positive electrode material is lithium-manganese oxide of spinel structure, lithium-nickel-cobalt complex oxide of layer structure, or lithium complex compound of olivine structure.