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Topotactic Conversion Route to Mesoporous Quasi-Single-Crystalline Co3O4 Nanobelts with Optimizable Electrochemical Performance

Authors

  • Li Tian,

    1. MOE Key Laboratory of Bioinorganic and Synthetic Chemistry State Key Laboratory of Optoelectronic Materials and Technology School of Chemistry and Chemical Engineering School of Physics and Engineering Sun Yat-Sen University Guangzhou, 510275 (PR China)
    2. School of Chemistry and Chemical Engineering Hunan University of Science and Technology Xiangtan, 411201 (PR China)
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  • Hongli Zou,

    1. MOE Key Laboratory of Bioinorganic and Synthetic Chemistry State Key Laboratory of Optoelectronic Materials and Technology School of Chemistry and Chemical Engineering School of Physics and Engineering Sun Yat-Sen University Guangzhou, 510275 (PR China)
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  • Junxiang Fu,

    1. MOE Key Laboratory of Bioinorganic and Synthetic Chemistry State Key Laboratory of Optoelectronic Materials and Technology School of Chemistry and Chemical Engineering School of Physics and Engineering Sun Yat-Sen University Guangzhou, 510275 (PR China)
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  • Xianfeng Yang,

    1. MOE Key Laboratory of Bioinorganic and Synthetic Chemistry State Key Laboratory of Optoelectronic Materials and Technology School of Chemistry and Chemical Engineering School of Physics and Engineering Sun Yat-Sen University Guangzhou, 510275 (PR China)
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  • Yi Wang,

    1. MOE Key Laboratory of Bioinorganic and Synthetic Chemistry State Key Laboratory of Optoelectronic Materials and Technology School of Chemistry and Chemical Engineering School of Physics and Engineering Sun Yat-Sen University Guangzhou, 510275 (PR China)
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  • Hongliang Guo,

    1. State Key Laboratory of High Performance Ceramics and Superfine Microstructures Shanghai Institute of Ceramics, Graduate School Chinese Academy of Sciences 1295 Dingxi Rd., Shanghai 200050 (PR China)
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  • Xionghui Fu,

    1. MOE Key Laboratory of Bioinorganic and Synthetic Chemistry State Key Laboratory of Optoelectronic Materials and Technology School of Chemistry and Chemical Engineering School of Physics and Engineering Sun Yat-Sen University Guangzhou, 510275 (PR China)
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  • Chaolun Liang,

    1. MOE Key Laboratory of Bioinorganic and Synthetic Chemistry State Key Laboratory of Optoelectronic Materials and Technology School of Chemistry and Chemical Engineering School of Physics and Engineering Sun Yat-Sen University Guangzhou, 510275 (PR China)
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  • Mingmei Wu,

    Corresponding author
    1. MOE Key Laboratory of Bioinorganic and Synthetic Chemistry State Key Laboratory of Optoelectronic Materials and Technology School of Chemistry and Chemical Engineering School of Physics and Engineering Sun Yat-Sen University Guangzhou, 510275 (PR China)
    • MOE Key Laboratory of Bioinorganic and Synthetic Chemistry State Key Laboratory of Optoelectronic Materials and Technology School of Chemistry and Chemical Engineering School of Physics and Engineering Sun Yat-Sen University Guangzhou, 510275 (PR China).
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  • Pei Kang Shen,

    Corresponding author
    1. MOE Key Laboratory of Bioinorganic and Synthetic Chemistry State Key Laboratory of Optoelectronic Materials and Technology School of Chemistry and Chemical Engineering School of Physics and Engineering Sun Yat-Sen University Guangzhou, 510275 (PR China)
    • MOE Key Laboratory of Bioinorganic and Synthetic Chemistry State Key Laboratory of Optoelectronic Materials and Technology School of Chemistry and Chemical Engineering School of Physics and Engineering Sun Yat-Sen University Guangzhou, 510275 (PR China).
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  • Qiuming Gao

    Corresponding author
    1. State Key Laboratory of High Performance Ceramics and Superfine Microstructures Shanghai Institute of Ceramics, Graduate School Chinese Academy of Sciences 1295 Dingxi Rd., Shanghai 200050 (PR China)
    • State Key Laboratory of High Performance Ceramics and Superfine Microstructures Shanghai Institute of Ceramics, Graduate School Chinese Academy of Sciences 1295 Dingxi Rd., Shanghai 200050 (PR China).
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Abstract

The growth of mesoporous quasi-single-crystalline Co3O4 nanobelts by topotactic chemical transformation from α-Co(OH)2 nanobelts is realized. During the topotactic transformation process, the primary α-Co(OH)2 nanobelt frameworks can be preserved. The phases, crystal structures, morphologies, and growth behavior of both the precursory and resultant products are characterized by powder X-ray diffraction (XRD), electron microscopy—scanning electron (SEM) and transmission electron (TEM) microscopy, and selected area electron diffraction (SAED). Detailed investigation of the formation mechanism of the porous Co3O4 nanobelts indicates topotactic nucleation and oriented growth of textured spinel Co3O4 nanowalls (nanoparticles) inside the nanobelts. Co3O4 nanocrystals prefer [0001] epitaxial growth direction of hexagonal α-Co(OH)2 nanobelts due to the structural matching of [0001] α-Co(OH)2//[111] Co3O4. The surface-areas and pore sizes of the spinel Co3O4 products can be tuned through heat treatment of α-Co(OH)2 precursors at different temperatures. The galvanostatic cycling measurement of the Co3O4 products indicates that their charge–discharge performance can be optimized. In the voltage range of 0.0–3.0 V versus Li+/Li at 40 mA g−1, reversible capacities of a sample consisting of mesoporous quasi-single-crystalline Co3O4 nanobelts can reach up to 1400 mA h g−1, much larger than the theoretical capacity of bulk Co3O4 (892 mA h g−1).

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