Seaweed-Derived Route to Fe2O3 Hollow Nanoparticles/N-Doped Graphene Aerogels with High Lithium Ion Storage Performance

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• 作者：Long Liu ; Xianfeng Yang ; Chunxiao Lv ; Aimei Zhu ; Xiaoyi Zhu ; Shaojun Guo ; Chengmeng Chen ; Dongjiang Yang
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：March 23, 2016
• 年：2016
• 卷：8
• 期：11
• 页码：7047-7053
• 全文大小：641K
• ISSN：1944-8252

文摘

We developed a nanoscale Kirkendall effect assisted method for simple and scalable synthesis of three-dimensional (3D) Fe₂O₃ hollow nanoparticles (NPs)/graphene aerogel through the use of waste seaweed biomass as new precursors. The Fe₂O₃ hollow nanoparticles with an average shell thickness of ∼6 nm are distributed on 3D graphene aerogel, and also act as spacers to make the separation of the neighboring graphene nanosheets. The graphene–Fe₂O₃ aerogels exhibit high rate capability (550 mA h g^–1 at 5 A g ^–1) and excellent cyclic stability (729 mA h g^–1 at 0.1 A g^–1 for 300 cycles), outperforming all of the reported Fe₂O₃/graphene hybrid electrodes, due to the hollow structure of the active Fe₂O₃ NPs and the unique structure of the 3D graphene aerogel framework. The present work represents an important step toward high-level control of high-performance 3D graphene–Fe-based NPs aerogels for maximizing lithium storage with new horizons for important fundamental and technological applications.