1. Graduate School of Science and Engineering, Ehime University, 2-5 Bunkyo-cho, Matsuyama, Ehime 790-8577, Japan
2. Research Unit for Power Generation and Storage Materials, Ehime University, Matsuyama, Ehime 790-8577, Japan
3. Mitsubishi Chemical Corporation, Yokohama, Kanagawa 227-8502, Japan
4. Advanced Research Support Center, Ehime University, Matsuyama, Ehime 790-8577, Japan
5. Graduate School of Materials Science, Nara Institute of Science and Technology, Ikoma, Nara 630-0192, Japan