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J. Braz. Chem. Soc. vol.14 número4

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Figure 2. Voltammetric curves for the 300 th  cycle during the polyaniline formation on different substrates at 100 mV s -1 : just carbon fiber, adsorbed DMcT/carbon fiber, and adsorbed DMcT-Cu ion/carbon fiber (procedure B), in 0.5 mol L -1   H 2 SO 4 / 0
Figure 3. Electrochemical stability tests showing the first and the 200 th  voltammetric cycles of the Pani(DMcT-Cu ion)/carbon fiber composites prepared with CuCl 2  according to procedures A (a) and B (b)
Figure 7. Complex-plane plots for the Pani(DMcT-Cu ion)/carbon fiber composites prepared according to procedures A (a) and B (b), polarized at 0.2 V in 0.5 mol L -1   H 2 SO 4  aqueous solutions.
Figure 8. SEM micrographs of the Pani(DMcT-Cu ion)/carbon fiber composites prepared with CuCl 2  (procedures A (a) and B (b)), or with CuSO 4  (procedures A (c) and B (d))

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