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Versatile Template-Free Construction of Hollow Nanostructured CeO2 Induced by Functionalized Carbon Materials

Abstract

Hollow nanostructured metal oxides (HNMOs) have gotten great attention as advanced materials due to their fascinating physicochemical properties and significantly enhanced performance. However, because of poor electron conductivity of most metal oxides, it is highly desirable to integrate metal oxides with conductive carbon materials for further achieving boosted behavior. Herein, induced by functionalized multi-walled carbon nanotubes (MWCNTs), rationally designed hollow sphere CeO2/multi-walled carbon nanotubes composite (HS-CeO2/MWCNTs) has been successfully prepared for the first time via a facile template-free hydrothermal reaction followed by calcination. Particularly, the appropriate functional groups density on the surface of MWCNTs can lead to the in-situ growth of hollow sphere CeO2. The HS-CeO2/MWCNTs composite featuring a unique 3D interpenetrating structure of hollow metal oxides and MWCNTs displays superior electrochemical performance over previously reported CeO2-based composites, delivering excellent specific capacitance, brilliant cycling stability of 90.1% retention after 5000 cycles, and prominent rate capability of 86.5% even at 10 A g-1. It is worth noting that our newly developed synthesis method equally well applies for the preparation of hollow sphere CeO2/activated carbon, hollow sphere CeO2/graphene oxide, and hollow sphere Fe2O3/MWCNTs. Developing carbon materials based hollow nanostructured metal oxides will open a new route to design advanced electrode materials for supercapacitors and other electrochemical energy storage devices.

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Publication details

The article was received on 21 Mar 2019, accepted on 16 Apr 2019 and first published on 16 Apr 2019


Article type: Paper
DOI: 10.1039/C9TA03067K
Citation: J. Mater. Chem. A, 2019, Accepted Manuscript

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    Versatile Template-Free Construction of Hollow Nanostructured CeO2 Induced by Functionalized Carbon Materials

    Z. Sun, H. Ge, S. Zhu, X. Cao, X. Guo, Z. Xiu, Z. Huang, H. Li, T. Ma and X. Song, J. Mater. Chem. A, 2019, Accepted Manuscript , DOI: 10.1039/C9TA03067K

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