Collaborative Innovation Center for Marine Biomass Fibers, Materials and Textiles of Shandong Province, School of Environmental Science and Engineering, Qingdao University , Qingdao 266071, China.
Analytical and Testing Center, South China University of Technology , Guangzhou 510640, China.
ACS Appl Mater Interfaces. 2016 Mar 23;8(11):7047-53. doi: 10.1021/acsami.5b12427. Epub 2016 Mar 14.
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.
我们开发了一种纳米级 Kirkendall 效应辅助方法，通过使用废弃的海藻生物质作为新的前体制备出具有三维（3D）结构的 Fe2O3 空心纳米粒子（NPs）/石墨烯气凝胶，这种方法简单且具有大规模合成的潜力。具有约 6nm 平均壳厚的 Fe2O3 空心纳米粒子分布在 3D 石墨烯气凝胶上，并且还作为间隔物使相邻的石墨烯纳米片分离。石墨烯-Fe2O3 气凝胶表现出高倍率性能（在 5A g-1 时为 550mA h g-1）和优异的循环稳定性（在 0.1A g-1 时 300 个循环后为 729mA h g-1），优于所有报道的 Fe2O3/石墨烯混合电极，这是由于活性 Fe2O3 NPs 的空心结构和 3D 石墨烯气凝胶框架的独特结构。本工作代表了在高性能 3D 石墨烯-Fe 基 NPs 气凝胶的高水平控制方面迈出的重要一步，为最大限度地提高锂离子存储性能提供了新的前景，具有重要的基础和技术应用价值。
