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Multi-shelled α-Fe2O3 microspheres for high-rate supercapacitors

多层壳结构α-Fe2O3中空微球用作高倍率超级电容器的研究

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Abstract

Hollow structured metal oxides are extensively studied in energy storage and conversion systems. In this work, we report the fabrication of multi-shelled Fe2O3 microspheres with nanospindles assembly on its exterior shell. The β-FeOOH precursor nanospindles were firstly grown on the surface of carbon microspheres to produce β-FeOOH@carbon composites, which were later converted into multi-shelled Fe2O3 microspheres by calcination in air. As electrode material for supercapacitors, the multi-shelled Fe2O3 microspheres exhibit high capacity and good rate capability. The electrode delivers the specific capacitances of 630 and 510 F g−1 at the current densities of 1 and 5 A g−1, respectively.

Abstract

中空结构的金属氧化物在能源储存和转化系统中已被广泛研究. 本文报道了纳米纺锤自组装的多层中空α-Fe2O3微米球. β-FeOOH前 驱体纳米锤首先在炭球表面沉积生长得到β-FeOOH@炭球复合材料, 然后在空气中烧结移除模板, 转变为多层中空α-Fe2O3微米球. 该材料 用作超级电容器的电极材料具有高容量和良好的倍率性能. 该电极在1 和5 A g−1的条件下, 可以释放630和510 F g−1的比放电容量.

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Authors and Affiliations

  1. School of Materials Science & Engineering, Central South University, Changsha, 410083, China

    Zhiwei Nie  (聂志伟), Yaping Wang  (王亚平), Yifang Zhang  (张伊放) & Anqiang Pan  (潘安强)

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  1. Zhiwei Nie  (聂志伟)
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  2. Yaping Wang  (王亚平)
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  3. Yifang Zhang  (张伊放)
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  4. Anqiang Pan  (潘安强)
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Corresponding author

Correspondence to Anqiang Pan  (潘安强).

Additional information

The authors contributed equally to this work.

Zhiwei Nie received his bachelor degree fromNorth China University of Science and Technology in 2013. He is currently a graduate student at the School ofMaterials Science and Engineering, Central SouthUniversity. His current research focuses on hollow-structured materials for electrochemical energy storage application.

Yaping Wang received her BE degree inmineral process engineering fromCentral South University in 2013. Currently, she is a graduate student under the guidance of Prof. Pan at the School of Materials Science and Engineering, Central South University. Her current research interest is hollow-structured materials for supercapacitors.

Anqiang Pan is currently a Sheng-Hua Professor at the School of Materials Science & Engineering, Central South University. He got his PhD degree in 2011 fromCentral South University and then worked at theUniversity ofWashington, Pacific Northwest National Laboratory and Nanyang Technological University. His current interests are on lithium ion batteries and supercapacitors.

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Nie, Z., Wang, Y., Zhang, Y. et al. Multi-shelled α-Fe2O3 microspheres for high-rate supercapacitors. Sci. China Mater. 59, 247–253 (2016). https://doi.org/10.1007/s40843-016-5028-8

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  • DOI: https://doi.org/10.1007/s40843-016-5028-8

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