1. Department of Materials Science and Engineering, Research Institute for Advanced Materials, College of Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Republic of Korea
2. Center for Nanoparticle Research at Institute for Basic Science (IBS), Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Republic of Korea
3. Battery R&D Center Samsung SDI Co., Ltd., Yeongtong-gu, Suwon-si, Gyeonggi-do 16678, Republic of Korea
4. Institute of Nanomaterials Research and Innovation for Energy (IN-RIE), Materials Science and Nanotechnology Program, Department of Physics, Faculty of Science, Khon Kaen University, Muang Khon Kaen 40002, Thailand