[1] Nanjing Tech Univ NanjingTech, Key Lab Flexible Elect KLOFE, Nanjing 2100, Jiangsu, Peoples R China
[2] Nanjing Tech Univ NanjingTech, IAM, Jiangsu Natl Synerget Innovat Ctr Adv Mat SICAM, Nanjing 2100, Jiangsu, Peoples R China
[3] Nanyang Technol Univ, Sch Mat Sci & Engn, 50 Nanyang Ave, Singapore 639798, Singapore
[4] Nanyang Technol Univ, Energy Res Inst ERI N, Interdisciplinary Grad Sch, 50 Nanyang Dr, Singapore 637553, Singapore
[5] ASTAR, Inst Mat Res & Engn, 2 Fusionopolis Way,Innovis 08-03, Singapore 138634, Singapore
[6] Univ Wollongong, Inst Superconducting & Elect Mat, Australian Inst Innovat Mat, Wollongong, NSW 2522, Australia