1. School of Materials Science & Engineering; Gwangju Institute of Science and Technology (GIST); 261 Cheomdan-gwagiro, Buk-gu Gwangju 500-712 South Korea
2. Department of Chemical Engineering; Pohang University of Science and Technology (POSTECH); 77 Cheongam-ro, Nam-gu Pohang 37673 South Korea
3. Energy Storage Research Department & Frontier Technology Institute; Hyundai Heavy Industries Co. Ltd; Gyeonggi-do 446-912 South Korea
4. Division of Electron Microscopic Research Group; Korea Basic Science Institute (KBSI); 169-148 Gwahak-ro, Yuseong-gu Daejeon 34133 South Korea