1. Faculty of Engineering, Aichi Institute of Technology, Yakusa, Toyota 470-0392, Japan
2. Department of Materials Science and Engineering, Seoul National University, Seoul 151-742, Korea
3. Institute of Chemistry and Technical Electrochemistry, Poznań University of Technology, ul. Piotrowo 3, 60-965 Poznań, Poland
4. Institute of Chemical and Environmental Engineering, Szczecin University of Technology, ul. Pulaskiego 10, 70-322 Szczecin, Poland