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Synthesis of Mesoporous ZnO Nanosheets via Facile Solvothermal Method as the Anode Materials for Lithium-ion Batteries

Nanoscale Research Letters (2016) 11(1) 1-6
DOI: 10.1186/s11671-016-1244-9
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Abstract

Mesoporous ZnO nanosheets are synthesized through a room temperature solvothermal method. Transmission and scanning electronic microscopy observations indicate that as-prepared ZnO hierarchical aggregates are composed and assembled by nanosheets with a length of 1–2 μm and a thickness of 10–20 nm, and interlaced ZnO nanosheets irregularly stack together, forming a three-dimensional network. Furthermore, large mesopores are embedded in the walls of ZnO nanosheets, confirmed by Brunauer-Emmett-Teller (BET) measurement. Accordingly, the resulting ZnO anode exhibits a high and stable specific discharge capacity of 421 mAh g−1 after 100 cycles at 200 mA g−1 and a good rate capability. Such electrochemical performance could be attributed to the multiple synergistic effects of its mesoporous nanosheet structure, which can not only provide a large specific surface area for lithium storage, but also favor the ion transport and electrolyte diffusion.

Figures

  • Fig. 1 XRD diffractogram of the prepared mesoporous ZnO nanosheet
  • Fig. 2 a Nitrogen adsorption/desorption isotherms of the mesoporous ZnO nanosheet. b Pore size distribution by using the BJH method of the mesoporous ZnO nanosheet
  • Fig. 3 Structural characterization of the mesoporous ZnO nanosheets. a–c SEM micrographs of the ZnO architectures. d, e HRTEM images of the ZnO nanosheet. f SAED pattern of the ZnO nanosheet
  • Fig. 4 Schematic diagram of the possible growth mechanism for the formation of the ZnO architectures
  • Fig. 5 The initial three CV curves of ZnO anode at a scan rate of 0.5 mV s−1
  • Fig. 6 The galvanostatic discharge/charge profiles of the ZnO anode
  • Fig. 7 The cycling performance of the ZnO anode for 100 cycles
  • Fig. 8 Rate performance of the ZnO anode

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APA

Wang, X., Huang, L., Zhao, Y., Zhang, Y., & Zhou, G. (2016). Synthesis of Mesoporous ZnO Nanosheets via Facile Solvothermal Method as the Anode Materials for Lithium-ion Batteries. Nanoscale Research Letters, 11(1), 1–6. https://doi.org/10.1186/s11671-016-1244-9

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