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Issue 45, 2018
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Three-dimensional hierarchical mesoporous flower-like TiO2@graphdiyne with superior electrochemical performances for lithium-ion batteries

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Abstract

Three-dimensional hierarchical flower-like TiO2@graphdiyne is prepared via a solvothermal process, and the structural properties and electrochemical performances are systematically investigated. The obtained results show that TiO2@graphdiyne delivers a high reversible capacity of 432.4 mA h g−1 after 300 cycles at a current density of 1 A g−1, about 3 times that (139.7 mA h g−1) of pristine TiO2. The high reversible capacities, excellent rate capability and cycle stability of TiO2@graphdiyne might be attributed to the hierarchical mesoporosity of graphdiyne with butadiyne linkages, which could not only provide innumerable interconnected active sites for lithium storage but also facilitate fast Li-ion diffusion. The built-in electric field derived from the difference in work function between TiO2 and graphdiyne could facilitate electron-transfer and Li-ion migration across heterojunction interfaces. Moreover, electron percolation and a local built-in electric field induced by oxygen vacancies in the TiO2 matrix could also enhance the kinetics of Li-ion insertion/deinsertion.

Graphical abstract: Three-dimensional hierarchical mesoporous flower-like TiO2@graphdiyne with superior electrochemical performances for lithium-ion batteries

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Publication details

The article was received on 24 Aug 2018, accepted on 12 Oct 2018 and first published on 12 Oct 2018


Article type: Paper
DOI: 10.1039/C8TA08225A
Citation: J. Mater. Chem. A, 2018,6, 22655-22661

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    Three-dimensional hierarchical mesoporous flower-like TiO2@graphdiyne with superior electrochemical performances for lithium-ion batteries

    Z. Lin, G. Liu, Y. Zheng, Y. Lin and Z. Huang, J. Mater. Chem. A, 2018, 6, 22655
    DOI: 10.1039/C8TA08225A

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