1. Department of Chemical Engineering, and Department of Materials Science and Engineering, Center for Information and Communication Materials, Hanyang University, Seoul 133-791, South Korea, VK Corporation, 67 Jije-Dong, Pyongtaek-City, Kyonggi-Do 450-090, South Korea, and Electrochemical Technology Program, Chemical Engineering Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439