1. School of Chemical Engineering and Technology Tianjin University Tianjin 300350 China
2. National Center for Nanoscience and Technology Beijing 100190 China
3. Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Tianjin 300072 China
4. Department of Materials Science and Engineering Northwestern University Evanston Illinois 60208 USA
5. Engineering Laboratory for Functionalized Carbon Materials and Shenzhen Key Laboratory for Graphene‐based Materials Graduate School at Shenzhen Tsinghua University Shenzhen 518055 China
6. Rare Metals Research Center Korea Institute of Geoscience and Mineral Resources Yuseong‐gu Daejeon 305‐350 Korea