Methods for improving the electrical conductivity of a carbon felt material is provided. In some embodiments, a method improving the electrical conductivity of a carbon felt material comprises applying a carbon source liquid to at least a portion of a carbon felt material, optionally removing excess carbon source liquid from the carbon felt material, and converting the carbon source material to solid carbon, such as by heating. Also provided are materials and products created using these methods.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH
 Inventions included in this patent application were made with Government support under DE-OE0000225 "Recovery Act--Flow Battery Solution for Smart Grid Renewable Energy Applications" awarded by the US Department of Energy (DOE). The Government has certain rights in these inventions.