Jump to main content
Jump to site search

Issue 45, 2016
Previous Article Next Article

From a 3D hollow hexahedron to 2D hierarchical nanosheets: controllable synthesis of biochemistry-enabled Na7V3(P2O7)4/C composites for high-potential and long-life sodium ion batteries

Author affiliations

Abstract

Tailoring materials into different structures offers unprecedented opportunities in the realization of their functional properties. Particularly, controllable design of diverse structured electrode materials is regarded as a crucial step towards fabricating high-performance batteries. Herein, a general biochemistry-directed strategy has been developed to fabricate functional materials with controllable architectures and superior performance. The natural structure of fern (i.e. Cibotium) spores realizes the formation of a three-dimensional hexahedral bio-precursor. Either its core or shell is targeted to be destroyed, resulting in different architectures, from a 3D hollow hexahedron to a 2D hierarchical nanosheet, of the final product. As a case study, sodium vanadium pyrophosphate (i.e. Na7V3(P2O7)4) is employed as the electrochemically active material in this study. The crucial role of controllable damage in the construction of diverse architectures is discussed. Moreover, the relationship between different outside architectures, internal microstructures and the sodium intercalation capabilities of the bio-composites is clarified. Among all the samples, the 2D nanosheet with hierarchical structures has the smallest particle size and the highest surface area, which are favourable for its fast sodium intercalation. As a result, it is capable of high-rate long-term cycling, which achieves a high cycling efficiency of 93% after 500 cycles at 20C. However, a 3D hollow hexahedron has a thick shell and inferior surface characteristics, which greatly limits its sodium transport kinetics and leads to inferior performance. Therefore, the present work not only highlights a general, green and energy-efficient biochemistry-enabled strategy to prepare high-performance electrode materials, but also provides clues to controllably design diverse architectures for functional materials.

Graphical abstract: From a 3D hollow hexahedron to 2D hierarchical nanosheets: controllable synthesis of biochemistry-enabled Na7V3(P2O7)4/C composites for high-potential and long-life sodium ion batteries

Back to tab navigation

Supplementary files

Publication details

The article was received on 05 Sep 2016, accepted on 17 Oct 2016 and first published on 18 Oct 2016


Article type: Paper
DOI: 10.1039/C6NR07012D
Citation: Nanoscale, 2016,8, 19120-19128
  •   Request permissions

    From a 3D hollow hexahedron to 2D hierarchical nanosheets: controllable synthesis of biochemistry-enabled Na7V3(P2O7)4/C composites for high-potential and long-life sodium ion batteries

    L. Ke, T. Yu, B. Lin, B. Liu, S. Zhang and C. Deng, Nanoscale, 2016, 8, 19120
    DOI: 10.1039/C6NR07012D

Search articles by author

Spotlight

Advertisements