Capacitor reliability can be improved with the right materials | Electronics Weekly
When choosing capacitors, properties such as volumetric efficiency, frequency stability, temperature rating or equivalent series resistance are often the primary factors that govern technology selection. In these cases, understanding factors affecting lifetime can help engineers ensure the product will deliver the required reliability.
Article: Capacitor lifetime depends on the materials
Electronics Weekly ran an article I wrote on Capacitors and their Lifetime. The operational (and shelf life) of the capacitor depends on the dielectric type and materials used in its construction.