1. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
2. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
3. Key Laboratory of Science and Technology on Wear and Protection of Materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
4. Leibniz-Institut fuer Verbundwerkstoffe GmbH, University of Kaiserslautern, Kaiserslautern 67663, Germany
5. Qingdao Center of Resource Chemistry & New Materials, Qingdao 266071, China