Highly Ordered Mesoporous Few-Layer Graphene Frameworks Enabled by Fe3O4 Nanocrystal Superlattices

• Published in: Angewandte Chemie International Edition Vol. 54; no. 19; pp. 5727 - 5731
• Main Authors: Jiao, Yucong, Han, Dandan, Liu, Limin, Ji, Li, Guo, Guannan, Hu, Jianhua, Yang, Dong, Dong, Angang
• Format: Journal Article
• Language: English
• Published: Weinheim WILEY-VCH Verlag 04.05.2015; WILEY‐VCH Verlag; Wiley Subscription Services, Inc
• Edition: International ed. in English
• Subjects: graphene; Graphite; lithium; mesoporous materials; nanostructures; self-assembly
• ISSN: 1433-7851; 1521-3773
• DOI: 10.1002/anie.201501398

While great progress has been achieved in the synthesis of ordered mesoporous carbons in the past decade, it still remains a challenge to prepare highly graphitic frameworks with ordered mesoporosity and high surface area. Reported herein is a simple synthetic methodology, based on the conversion of self‐assembled superlattices of Fe3O4 nanocrystals, to fabricate highly ordered mesoporous graphene frameworks (MGFs) with ultrathin pore walls consisting of three to six stacking graphene layers. The MGFs possess face‐centered‐cubic symmetry with interconnected mesoporosity, tunable pore width, and high surface area. Because of their unique architectures and superior structural durability, the MGFs exhibit excellent cycling stability and rate performance when used as anode materials for lithium‐ion batteries, thus retaining a specific capacity of 520 mAh g−1 at a current density of 300 mA g−1 after 400 cycles. Framed: The title frameworks were fabricated from self‐assembled Fe3O4 nanocrystal superlattices. Because of their unique architectures and superior structure durability, the mesoporous graphene frameworks exhibit excellent electrochemical performance when used as anode materials for lithium‐ion batteries.