The effective ionic conductivity in a composite structure is believed to decrease rapidly with volume fraction. A system, such as a bipolar device or energy storage device, has structures or components in which the diffusion length or path that electrodes or ions must traverse is minimized and the interfacial...http://www.google.com/patents/US8148009?utm_source=gb-gplus-sharePatent US8148009 - Reticulated and controlled porosity battery structures
