CARBON NANOTUBE BASED ELECTRODE MATERIALS FOR HIGH PERFORMANCE BATTERIES

摘要

Improved battery materials, and a process for producing such improved battery materials are disclosed. The materials and methods employ battery components based on porous lightweight non woven substrate materials that are coated with dispersions comprised of carbon nanotubes, conductive secondary particles (usually with an approximate diameter between about 0.5 nm to 100 microns), a binder and a solvent. The dispersions permeate the substrate's pores, and when cured, the carbon nanotubes form conductive bridges between the conductive secondary particles, and these in turn are held on the substrate by the binder. The net effect is to increase the battery's total active material and energy density. The permeated substrate may then be further treated to achieve the desired conductivity as needed. These materials and methods can produce improved lead acid and silver zinc batteries, as well as other types of batteries.