TECHNOLOGY FOCUS - ELECTRICAL POWER AND ENERGY - Preferred Battery: The battery further comprises a battery separator assembly positioned between the first and second lithium ion half cells. In the battery, each half cell further comprises a current collector, and an organic binder binding the active material together and to the current collector.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The porous electrolyte percolation additive includes several interconnected open pores structured to allow the electrolyte to flow from one interconnected pore to another interconnected pore through the porous electrolyte percolation additive. The porous electrolyte percolation additive includes pores having a diameter of 0.03-1.5 microns. The porous electrolyte percolation additive is present as discrete particles, or as particles having a maximum transverse dimension of at least 1 micron. The porous electrolyte percolation additive has a density of 0.1-0.5 g/cc. The active material and the porous electrolyte percolation additive are present in a layer having a total porosity of at least 40% of the volume of the layer. The lithium ion cell includes two lithium ion half cells comprising a first lithium ion half cell having a cathode active material and a second lithium ion half cell having an anode active material, where the first and second lithium ion half cells are operatively coupled together. The porous electrolyte percolation additive is present as porous particles having rounded shapes, or as elongated porous fibers. The lithium ion cell further includes a conductivity additive in an amount effective to increase the electrical conductivity in the lithium ion cell relative to an identical lithium ion cell without the electrical conductivity additive. The porous electrolyte percolation additive is present in an amount of 2-40 vol.% of the combination of the active material and the porous electrolyte percolation additive. The porous electrolyte percolation additive includes a material selected from glass, ceramic and/or polymeric materials.