Chaudhari Nitin K, Chaudhari Sudeshna, Yu Jong-Sung
Department of Advanced Materials Chemistry, Korea University, 2511 Sejong-ro, Sejong 339-700 (Republic of Korea); Current Address: Energy and Environment Fusion Technology Centre, Department of Energy and Biotechnology, Myongji University, Yongin, Gyeonggi-do 449-728 (Republic of Korea).
ChemSusChem. 2014 Nov;7(11):3102-11. doi: 10.1002/cssc.201402526. Epub 2014 Oct 7.
Well-dispersed cube-like iron oxide (α-Fe2O3) nanoparticles (NPs) supported on ordered multimodal porous carbon (OMPC) are synthesized for the first time by a facile and efficient glycine-assisted hydrothermal route. The effect of OPMC support on growth and formation mechanism of the Fe2O3 NPs is discussed. OMPC as a supporting material plays a pivotal role of controlling the shape, size, and dispersion of the Fe2O3 NPs. As-synthesized α-Fe2O3/OMPC composites reveal significant improvement in the performance as electrode material for supercapacitors. Compared to the bare Fe2O3 and OMPC, the composite exhibits excellent cycling stability, rate capability, and enhanced specific capacitances of 294 F g(-1) at 1.5 A g(-1), which is twice that of OMPC (145 F g(-1)) and about four times higher than that of bare Fe2O3 (85 F g(-1)). The improved electrochemical performance of the composite can be attributed to the well-defined structure, high conductivity, and hierarchical porosity of OMPC as well as the unique α-Fe2O3 NPs with cube-like morphology well-anchored on the OMPC support, which makes the composite a promising candidate for supercapacitors.
首次通过简便高效的甘氨酸辅助水热法合成了负载在有序多模态多孔碳（OMPC）上的分散良好的立方状氧化铁（α-Fe₂O₃）纳米颗粒（NPs）。讨论了OPMC载体对Fe₂O₃ NPs生长和形成机制的影响。OMPC作为载体材料在控制Fe₂O₃ NPs的形状、尺寸和分散方面起着关键作用。所合成的α-Fe₂O₃/OMPC复合材料作为超级电容器电极材料的性能有显著提高。与纯Fe₂O₃和OMPC相比，该复合材料表现出优异的循环稳定性、倍率性能，在1.5 A g⁻¹时比电容提高到294 F g⁻¹，是OMPC（145 F g⁻¹）的两倍，约为纯Fe₂O₃（85 F g⁻¹）的四倍。复合材料电化学性能的改善可归因于OMPC明确的结构、高导电性和分级孔隙率，以及独特的立方状α-Fe₂O₃ NPs良好地锚定在OMPC载体上，这使得该复合材料成为超级电容器的有前途的候选材料。
