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Hierarchical Structural Evolution of Zn2GeO4 in Binary Solvent and Its Effect on Li-ion Storage Performance

Journal Article


Abstract


  • Zinc germinate (Zn2GeO4) with a hierarchical structure was successfully synthesized in a binary ethylenediamine/water (En/H2O) solvent system by wet chemistry methods. The morphological evolution process of the Zn2GeO4 was investigated in detail by tuning the ratio of En to H2O in different solvent systems, and a series of compounds with awl-shaped, fascicular, and cross-linked hierarchical structures was obtained and employed as anode materials in lithium-ion batteries. The materials with fascicular structure exhibited excellent electrochemical performance, and a specific reversible capacity of 1034 mA h g-1 was retained at a current density of 0.5 A g-1 after 160 cycles. In addition, the as-prepared nanostructured electrode also delivered impressive rate capability of 315 mA h g-1 at the current density of 10 A g-1. The remarkable electrochemical performances could be ascribed to the following aspects. First, each unit in the three-dimensional fascicular structure can effectively buffer the volume expansions during the Li+ extraction/insertion process, accommodate the strain induced by the volume variation, and stabilize its whole configuration. Meanwhile, the small fascicular units can enlarge the electrode/electrolyte contact area and form an integrated interlaced conductive network which provides continuous electron/ion pathways.

UOW Authors


  •   Liu, Wei (external author)
  •   Zhou, Tengfei (external author)
  •   Zheng, Yang (external author)
  •   Liu, Kevin (external author)
  •   Feng, Chuanqi (external author)
  •   Shen, Yue (external author)
  •   Huang, Yunhui (external author)
  •   Guo, Zaiping

Publication Date


  • 2017

Citation


  • Liu, W., Zhou, T., Zheng, Y., Liu, J., Feng, C., Shen, Y., Huang, Y. & Guo, Z. (2017). Hierarchical Structural Evolution of Zn2GeO4 in Binary Solvent and Its Effect on Li-ion Storage Performance. ACS Applied Materials and Interfaces, 9 (11), 9778-9784.

Scopus Eid


  • 2-s2.0-85015827121

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2428

Has Global Citation Frequency


Number Of Pages


  • 6

Start Page


  • 9778

End Page


  • 9784

Volume


  • 9

Issue


  • 11

Place Of Publication


  • United States

Abstract


  • Zinc germinate (Zn2GeO4) with a hierarchical structure was successfully synthesized in a binary ethylenediamine/water (En/H2O) solvent system by wet chemistry methods. The morphological evolution process of the Zn2GeO4 was investigated in detail by tuning the ratio of En to H2O in different solvent systems, and a series of compounds with awl-shaped, fascicular, and cross-linked hierarchical structures was obtained and employed as anode materials in lithium-ion batteries. The materials with fascicular structure exhibited excellent electrochemical performance, and a specific reversible capacity of 1034 mA h g-1 was retained at a current density of 0.5 A g-1 after 160 cycles. In addition, the as-prepared nanostructured electrode also delivered impressive rate capability of 315 mA h g-1 at the current density of 10 A g-1. The remarkable electrochemical performances could be ascribed to the following aspects. First, each unit in the three-dimensional fascicular structure can effectively buffer the volume expansions during the Li+ extraction/insertion process, accommodate the strain induced by the volume variation, and stabilize its whole configuration. Meanwhile, the small fascicular units can enlarge the electrode/electrolyte contact area and form an integrated interlaced conductive network which provides continuous electron/ion pathways.

UOW Authors


  •   Liu, Wei (external author)
  •   Zhou, Tengfei (external author)
  •   Zheng, Yang (external author)
  •   Liu, Kevin (external author)
  •   Feng, Chuanqi (external author)
  •   Shen, Yue (external author)
  •   Huang, Yunhui (external author)
  •   Guo, Zaiping

Publication Date


  • 2017

Citation


  • Liu, W., Zhou, T., Zheng, Y., Liu, J., Feng, C., Shen, Y., Huang, Y. & Guo, Z. (2017). Hierarchical Structural Evolution of Zn2GeO4 in Binary Solvent and Its Effect on Li-ion Storage Performance. ACS Applied Materials and Interfaces, 9 (11), 9778-9784.

Scopus Eid


  • 2-s2.0-85015827121

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2428

Has Global Citation Frequency


Number Of Pages


  • 6

Start Page


  • 9778

End Page


  • 9784

Volume


  • 9

Issue


  • 11

Place Of Publication


  • United States