Jump to main content
Jump to site search


A three-dimensional hierarchical structure of cyclized-PAN/Si/Ni for mechanically stable silicon anodes

Author affiliations

Abstract

The main challenges associated with silicon anodes are their poor conductivity and severe structural degradation during cycling. Here we design a three-dimensional sandwich hierarchical structure that tackles these problems, and we demonstrate its use in flexible, large-area silicon anode assemblies. The design of the electrode is achieved via plasma enhanced chemical vapor deposition of silicon nanoparticles onto three-dimensional nickel foam followed by conformal coating of cyclized-PAN on the silicon surface, thus forming a sandwiched cyclized-PAN/Si/Ni hierarchical structure. The three-dimensional networks provide abundant electroactive zones and conductive transport paths, the conformal coating of cyclized-PAN accommodates volume change during cycling, and the monolithic electrode configuration without additional binders or conductive agents improves the energy density of the whole electrode. Furthermore, as a result of the sandwich hierarchical arrangement, the solid-electrolyte interface of the anode remains stable and spatially confined, leading to an increased reversible capacity and improved cycling stability (910 mA h g−1 after 100 cycles at 1.0 A g−1).

Graphical abstract: A three-dimensional hierarchical structure of cyclized-PAN/Si/Ni for mechanically stable silicon anodes

Back to tab navigation

Publication details

The article was received on 03 Oct 2017, accepted on 02 Nov 2017 and first published on 08 Nov 2017


Article type: Paper
DOI: 10.1039/C7TA08744F
Citation: J. Mater. Chem. A, 2017, Advance Article
  •   Request permissions

    A three-dimensional hierarchical structure of cyclized-PAN/Si/Ni for mechanically stable silicon anodes

    W. Bao, J. Wang, S. Chen, W. Li, Y. Su, F. Wu, G. Tan and J. Lu, J. Mater. Chem. A, 2017, Advance Article , DOI: 10.1039/C7TA08744F

Search articles by author

Spotlight

Advertisements