NOVELTY - Lithium-ion secondary battery (1) comprises negative electrode current collector layer (11); negative-electrode active material layer (12) containing lithium titanium oxide (Li4Ti5O12) as active material; solid electrolyte layer (13) containing polyethylene oxide and polystyrene; positive-electrode active material layer (14) containing lithium cobalt oxide (LiCoO2) as active material; and positive-electrode current collector layer (15), which are sequentially laminated.    USE - Lithium-ion secondary battery used for vehicle and electronic device (claimed).    ADVANTAGE - The lithium-ion secondary battery has high capacity and good charge and discharge characteristics. It has small and thin size and has excellent productivity.    DETAILED DESCRIPTION - Lithium-ion secondary battery (1) comprises negative electrode current collector layer (11); negative-electrode active material layer (12) containing lithium titanium oxide (Li4Ti5O12) as active material; solid electrolyte layer (13) containing polyethylene oxide and polystyrene; positive-electrode active material layer (14) containing lithium cobalt oxide (LiCoO2) as active material; and positive-electrode current collector layer (15), which are sequentially laminated. The negative-electrode active material layer has striped structure made up of stripe-shaped pattern elements (121) parallel to each other. The striped-shaped elements are arranged on surface of negative-electrode current collector layer while being spaced apart. Angle at side including negative-electrode active material layer out of angles formed between surface of negative-electrode current collector layer and tangent drawn to negative-electrode active material layer at contact point of each stripe-shaped pattern element and negative-electrode current collector layer is less than 90 degrees . The negative-electrode current collector layer and solid electrolyte layer are contacting at contact points of stripe-shaped pattern elements and negative-electrode current collector layer. Each stripe-shaped pattern element contacting with negative-electrode current collector layer has width of 20-300 mu m, height of 10-300 mu m, and ratio of height to width of greater than or equal to 0.5. The stripe-shaped pattern elements have smooth curved surfaces except for portions in contact with negative electrode current collector layer. INDEPENDENT CLAIMS are included for:    (1) vehicle comprising motor and lithium-ion secondary battery for supplying power to motor;    (2) electronic device comprising lithium secondary batter and electronic circuit;and    (3) manufacture of lithium-ion secondary battery.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic cross-sectional view of lithium-ion secondary battery.    Lithium-ion secondary battery (1)    Negative electrode current collector layer (11)    Negative-electrode active material layer (12)    Solid electrolyte layer (13)    Positive-electrode active material layer (14)    Positive-electrode current collector layer (15)    Stripe-shaped pattern elements (121)