1. 1) K. Kikuchi, R. Yamashita, and S. Sakuragawa, Trans. Mater. Res. Soc. Jpn., 37, 557 (2012).
2. 2) A. Nishino and K. Naoi, Technologies and Materials for Advanced EDLC, CMC Publishing Co., Ltd., Tokyo (1998). [in Japanese]
3. 3) K. Naoi and N. Ogihara, Current Status and Perspective of Advanced Materials for Automobiles, CMC Publishing Co., Ltd., Tokyo (2005). [in Japanese]
4. 4) H. Shimamoto and C. Yamada, Panasonic Technical Journal, 55(2), 54 (2009). [in Japanese]
5. 5) K. Mori, K. Atsuga, and A. Hasebe, Tokin Tech. Rev., 28, 76 (2001).