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In situ topotactic synthesis of porous network Zn2Ti3O8 platelike nanoarchitecture and its long-term cycle performance for LIBs anode

Abstract

This paper introduces the in situ topotactic synthesis of the porous network Zn2Ti3O8 platelike nanoarchitecture via using layered H1.07Ti1.73O4·H2O (HTO) as the precursor. The introduction of H2O2 in interlayer of HTO leads to access of more Zn2+ ion into the interlayers and the formation of Zn2+ ion-exchanged product with Zn/Ti molar ratio of 1.07:1.73 during ion exchange. This ion-exchanged product is in situ topotactically transformed into Zn2Ti3O8 nanoarchitecture after heat-treatment, and the [110]-crystal-axis of Zn2Ti3O8 nanoarchitecture is vertical to the basal plane of 2D nanoarchitecture. The H2O2 molecule within ion-exchanged product decomposes and escapes due to heat-treatment, resulting in the formation of the porous network structure similar to sponge. The pore size is about 10∼20 nm. Moreover, the electrochemical investigation indicates that such porous network Zn2Ti3O8 nanoarchitecture as Li-ion battery anode has its reversible capacity of 423 mAh g-1 during 100th cycle at the current density of 100 mA g−1. It is wondrous that at the current density of 1 Ag−1 during 1000 cycles, its reversible capacity still remains 408 mAh g-1.

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Publication details

The article was received on 04 Aug 2018, accepted on 12 Oct 2018 and first published on 13 Oct 2018


Article type: Paper
DOI: 10.1039/C8CE01303A
Citation: CrystEngComm, 2018, Accepted Manuscript
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    In situ topotactic synthesis of porous network Zn2Ti3O8 platelike nanoarchitecture and its long-term cycle performance for LIBs anode

    X. Kong, X. Wang, D. Ma, J. Huang, J. Li, T. Zhao, L. Yin and Q. Feng, CrystEngComm, 2018, Accepted Manuscript , DOI: 10.1039/C8CE01303A

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