| 摘要 |
Provided is a means for enhancing lifespan characteristics while minimizing the decrease in cell energy density in an electrical device obtained using a separator with a heat-resistant insulating layer configured by layering a heat-resistant insulating layer on the surface of a porous substrate. An electrical device having at least one single cell in which a positive electrode, an electrolyte layer comprising a non-aqueous electrolyte being held in a separator, and a negative electrode are layered in the sequence listed; wherein the separator has a porous substrate layer and a heat-resistant insulating layer formed on one or both surfaces of the porous substrate layer, the heat-resistant insulating layer including inorganic particles and a binder; and wherein formula (1) is satisfied. y <= 0.145x + 0.075 (1) In the formula, x is the ratio (L/V) of the amount of non-aqueous electrolyte (L) relative to the total void volume (V) of the positive electrode, negative electrode, and separator, where x >= 1; and y is the ratio (Vs/V) of the void volume (Vs) of the separator relative to the total void volume (V) of the positive electrode, negative electrode, and separator, where y > 0. |
