| abstract |
An object of the present invention is to provide a pressure-sensitive adhesive sheet for a battery in which a local decrease in insulation is suppressed and which has a high adhesive strength, and a lithium-ion battery using the pressure-sensitive adhesive sheet for a battery. A pressure-sensitive adhesive sheet for a battery, comprising: a base material; and a pressure-sensitive adhesive layer provided on one surface side of the base material, the pressure-sensitive adhesive layer including inorganic fine particles. In the particle size distribution of the inorganic fine particles 121 in the pressure-sensitive adhesive layer 12 measured by image analysis on the surface opposite to the surface 11, the cumulative 50% particle diameter based on the volume of the inorganic fine particles 121 is set to D50. When the volume-based cumulative 90% particle size of 121 is D90, the D50 is 0.5 μm or more and 2.8 μm or less, and the ratio of the D90 to the D50 (D90 / D50) is 1.3. As described above, the pressure-sensitive adhesive sheet for batteries 1 has a value of 2.0 or less. [Selection diagram] Fig. 1 |