1. Key Laboratory of Materials Physics, Centre for Environmental and Energy Nanomaterials, Key Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei, 230031, China
2. Department of Energy and Petroleum Engineering, Science Island Branch, Graduate School of USTC, Hefei, 230026, China
3. Department of Petroleum Engineering, University of Stavanger, Stavanger 4036, Norway