JP2006173138A5 - - Google Patents

Claims (7)

Each of the two outermost electrodes of the electrode structure having a positive electrode, a negative electrode, an electrolyte solution, and a separator, in which a plurality of the positive electrodes and the negative electrodes are arranged, is a negative electrode, and a backcoat layer is formed on these negative electrodes The back coat layer contains a resin component and a filler made of an inorganic material, and when the total of the resin component and the filler is 100, the filler content is 16.7-90.9 mass. % Lithium secondary battery. The lithium secondary battery according to claim 1, wherein the back coat layer has a thickness of 80 to 500 μm .   The lithium secondary battery according to claim 1, wherein the backcoat layer has a short-circuit prevention function of preventing a short circuit between the electrodes.   The lithium secondary battery according to claim 1, wherein the backcoat layer has a function of preventing electrode warpage.   The lithium secondary battery according to any one of claims 1 to 4, wherein the puncture strength of the separator is 50 gf or more.   The lithium secondary battery according to claim 1, wherein the electrode structure has a laminated structure.   Each of the two outermost electrodes of the electrode structure having a positive electrode, a negative electrode, an electrolytic solution, and a separator, in which a plurality of the positive electrodes and the negative electrodes are arranged, is a negative electrode, and a back coat layer is formed on these negative electrodes The lithium secondary battery in which the back coat layer contains a resin component and a filler made of an inorganic material, and when the resin component is 100, the filler is added in an amount of 20 to 99% by mass.