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首页> 外文期刊>Materials & design >Solvothermal synthesis of hollow Fe3O4 sub-micron spheres and their enhanced electrochemical properties for supercapacitors
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Solvothermal synthesis of hollow Fe3O4 sub-micron spheres and their enhanced electrochemical properties for supercapacitors

机译：中空Fe3O4亚微米球的溶剂热合成及其超级电容器的电化学性能

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Uniform hollow Fe3O4 sub-micron spheres (HFOS) with particle size ranging from 350 to 450 nm have been fabricated by a controlled solvothermal synthesis with ferric chloride hexahydrate as sole iron source and sodium dodecylbenzenesulfonate (SDBS) as a surfactant. The suitable addition of SDBS has been proved to promote the formation of monodisperse Fe3O4 hollow particles with narrow size distribution. Good intrinsic magnetic properties including high saturation magnetization of 80.1 A.m(2)kg(-1) and very low coercivity of 7.3 Oe are observed in these HFOS due to their high purity and spherical morphologies. The electrochemical studies have revealed that these high-purity monodisperse HFOS exhibit high specific capacitance of 294 F g(-1) at 0.5 A g(-1) and good cycle stability with a maintenance of about 90.8% original capacitance after 500 charge/discharge cycles. The excellent electrochemical properties for these HFOS can be attributed to their high purity and large specific surface area resulting from their hollow structure, which promises their big potential application for high-performance supercapacitors. (C) 2016 Elsevier Ltd. All rights reserved.
机译：通过以六水合氯化铁为唯一铁源和十二烷基苯磺酸钠（SDBS）为表面活性剂的受控溶剂热合成，制备了粒径为350至450 nm的均匀空心Fe3O4亚微米球（HFOS）。已证明适当添加SDBS可以促进形成具有窄尺寸分布的单分散Fe3O4中空颗粒。由于它们的高纯度和球形形态，在这些HFOS中观察到良好的固有磁性，包括80.1 A.m（2）kg（-1）的高饱和磁化强度和7.3 Oe的极低矫顽力。电化学研究表明，这些高纯度单分散HFOS在0.5 A g（-1）时表现出294 F g（-1）的高比电容，并具有良好的循环稳定性，在500次充电/放电后维持约90.8％的原始电容周期。这些HFOS的优异电化学性能可归因于其空心结构带来的高纯度和大比表面积，这保证了它们在高性能超级电容器中的巨大应用潜力。 （C）2016 Elsevier Ltd.保留所有权利。

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