1. Division of Materials Science Engineering, Hanyang University, Seoul 133-791, Korea
2. Department of Materials Science and Engineering, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801
3. Energy Lab., Samsung Advanced Institute of Technology, Samsung Electronics Co. Ltd. Suwon 440-600, Korea
4. Corporate Research & Development Center, Samsung SDI Co. Ltd. Yongin, Kyeonggi-Do 449-902, Korea
5. Departments of Civil and Environmental Engineering and Mechanical Engineering, Northwestern University, Evanston, Illinois 60208
6. Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China
7. WCU Department of Energy Engineering, Hanyang University, Seoul 133-791, Korea