1. Graphene Composite Research Center College of Chemistry and Environmental Engineering Shenzhen University Shenzhen 518060 P. R. China
2. School of Advanced Materials Peking University Shenzhen Graduate School Shenzhen 518055 P. R. China
3. GRINM (Guangdong) Institute for Advanced Materials and Technology Foshan Guangdong 528051 P. R. China
4. Shenzhen Eigen–Equation Graphene Technology Co. Ltd Shenzhen 518000 P. R. China