1. State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Shaanxi Joint Laboratory of Graphene, Northwestern Polytechnical University, Xi’an 710072, P. R. China
2. International Research Center for Composite and Intelligent Manufacturing Technology, Institute of Chemical Power Sources, School of Science, Xi’an University of Technology, Xi’ an 710048, P. R. China
3. National Centre for Computational Design and Discovery of Novel Materials (MARVEL), École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland