TECHNOLOGY FOCUS - POLYMERS - Preferred Method: The method is operated at room temperature in 30 to 10 minutes. The rate of shearing is 400-3500 rpm. The non-fribrillated PTFE is added portionwise. The resultant mixture is processed into the sheet by calendering. Preferred Composition: The composition comprises (%.dry wt.) PTFE (2-10), carbon particles (60-98) and conducting material (0-30). The ratio by weight between the water and total of the PTFE, the conducting material and the carbon particles is 3:2 to 4:1. Preferred Components: The solvent is water or ethanol. The conducting material comprises strongly acidic cation ion exchange resin, strongly basic anion ion exchange resin, carbon black or graphite powder. EXAMPLE - Activated carbon (C1) of coconut shell type, having average particle size of 15 microns and surface area of 2000 m2/g) (12 g) and water (38 g) were added into a speed mixer and mixed at room temperature with 1000 rotations per minute (rpm) speed for 30 s. Then T-60 (RTM: emulsion of poly(tetrafluoroethylene) (PTFE)) (0.6 g) was dropped into the above mixture and mixed at 1000 rpm for 30 s. Another PTFE (0.6 g) was dropped into the mixture and mixed at 1000 rpm for 30 s. Then the resultant mixture was formed as a paste with some water seeped out from the mixture. The paste was used directly for calendering without any drying step. It was subjected to roll calendaring. The process was repeated for 5 times with 90 degrees to form carbon composite test thin sheet with approximately 1 mm thickness. (C1) (12 g), water (38 g) and PTFE (1.2 g) were mixed in a speed mixer at room temperature at 1000 rpm speed for 60 seconds. The slurry was not easy for directly calendering on the roller due to much water in without water separating from the slurry. After standing for 30 minutes, water leached out to form a paste, which used for roll calendering. The roll calendaring process was repeated for 8 times with 90 degrees to form uniform carbon composite comparative thin sheet with approximately 1 mm thickness. The test/comparative sheets showed tensile strength of 0.14/0.04 Mpa respectively.