1. Energy Research Institute at Nanyang Technological University (ERI@N), Research Techno Plaza, X-Frontier Block, Level 5, 50 Nanyang Drive, Singapore 637553, Singapore
2. School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
3. Department of Metallurgical and Materials Engineering, National Institute of Technology Karnataka (NITK), NH 66, Srinivasnagar, Surathkal, Mangaluru, Karnataka 575025, India
4. School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore