Preparing the slurry at 208 (FIG. 2) may include stirring and/or heating the slurry. The slurry 320 may be stirred for greater than or equal to about 2 hours, optionally greater than or equal to about 6 hours, optionally greater than or equal to about 10 hours, optionally greater than or equal to about 14 hours, or optionally greater than or equal to about 18 hours. The slurry 208 may be stirred for less than or equal to about 20 hours, optionally less than or equal to about 16 hours, optionally less than or equal to about 12 hours, optionally less than or equal to about 8 hours, or optionally less than or equal to about 4 hours. In certain aspects, the slurry may be stirred for a duration of greater than or equal to about 2 hours to less than or equal to about 20 hours. Concurrently with the stirring, the slurry may be heated to a temperature of greater than or equal to about 60° C., optionally greater than or equal to about 65° C., optionally greater than or equal to about 70° C., optionally greater than or equal to about 75° C., optionally greater than or equal to about 80° C., optionally greater than or equal to about 85° C., or optionally greater than or equal to about 90° C. The temperature may be less than or equal to about 95° C., optionally less than or equal to about 90° C., optionally less than or equal to about 85° C., optionally less than or equal to about 80° C., optionally less than or equal to about 75° C., optionally less than or equal to about 70° C., or optionally less than or equal to about 65° C. In certain aspects, the temperature may be greater than or equal to about 60° C. to less than or equal to about 95° C. In certain aspects, the conductive polymer 310 is cross-linked during formation of the slurry 320, such as via electrostatics.