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Conducting polypyrrole (PPy) films doped with p-toluenesulfonate (TOS − ), ClO 4− , and Cl − were electrochemically prepared, respectively. The electrochemical capacitance properties of the PPy films were investigated with cyclic voltammetry (CV), galvanostatical charge/discharge, and electrochemical impedance spectroscope (EIS) techniques. The morphology observation and...
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