Abstract
Sulfonated poly(phenylene oxide) (SPPO) film was electrodeposited on Ti3+-doped TiO2 nanotube arrays (Ti3+/TiO2NT) electrode via the electropolymerization of sulfonated phenol. The as-synthesized SPPO/Ti3+/TiO2NT membrane/electrode was investigated in terms of SEM, FESEM, EDX, FTIR, XPS, galvanostatic charge/discharge, and cycle voltammetry (CV). As expected, the porous SPPO film did form on the surface of Ti3+/TiO2NT electrode; furthermore, the resultant SPPO/Ti3+/TiO2NT membrane/electrode delivered higher electrochemical performances than PPO/Ti3+/TiO2NT, mainly attributed to the contributions of the ionic conductivity induced by –SO3H groups within SPPO.
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