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Controlled synthesis of hollow octahedral ZnCo2O4 nanocages assembled by untrathin 2D nanosheets for enhanced lithium storage

Abstract

Hollow octahedral ZnCo2O4 nanocages assembled by untrathin 2D nanosheets are prepared through a facile fast simultaneous coordinating etching and a thermal process. Amorphous (ZnCox)O(OH) nanocages produce uniformly initially, and then calcinations lead to the formation of hollow octahedral ZnCo2O4. As anode materials for lithium ion batteries (LIBs), this composite shows significantly enhanced lithium storage performances with the synergetic effects of the unique untrathin 2D nanosheets and the hollow structure which provides a buffer spaces for volume expansion during charge/discharge processes and feasible transfer pathway for electron/ion. Electrochemical results exhibit the hollow octahedral ZnCo2O4 nanocage is an outstanding anode material for LIBs with a high reversible discharge capacity of 1025 mAhg-1 at 500 mAg-1 after 200 cycles, outstanding rate capability of 525 mAhg-1 at 4 Ag-1. Moreover, this simple, low cost and fast process could be useful for construction of many other hollow advanced materials for supercapacitor, sensor and other novel energy and environmental applications.

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Publication details

The article was received on 22 Aug 2017, accepted on 13 Oct 2017 and first published on 13 Oct 2017


Article type: Communication
DOI: 10.1039/C7NR06259A
Citation: Nanoscale, 2017, Accepted Manuscript
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    Controlled synthesis of hollow octahedral ZnCo2O4 nanocages assembled by untrathin 2D nanosheets for enhanced lithium storage

    B. Liu, H. Liu, M. Liang, L. Liu, Z. Lv, H. Zhou and H. Guo, Nanoscale, 2017, Accepted Manuscript , DOI: 10.1039/C7NR06259A

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