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

Journal Article · · Journal of Materials Chemistry. A
DOI:https://doi.org/10.1039/c7ta08744f· OSTI ID:1461409
 [1];  [2];  [2];  [1];  [2];  [2]; ORCiD logo [3]; ORCiD logo [4]
  1. Beijing Institute of Technology, Beijing (China)
  2. Beijing Institute of Technology, Beijing (China); National Development Center of High Technology Green Materials, Beijing (China); Collaborative Innovation Center of Electric Vehicles in Beijing, Beijing (China)
  3. Beijing Institute of Technology, Beijing (China); National Development Center of High Technology Green Materials, Beijing (China)
  4. Argonne National Lab. (ANL), Lemont, IL (United States)

Here, 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).

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1461409
Journal Information:
Journal of Materials Chemistry. A, Vol. 5, Issue 47; ISSN 2050-7488
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 25 works
Citation information provided by
Web of Science

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Cited By (2)

Catalytic Growth of Graphitic Carbon‐Coated Silicon as High‐Performance Anodes for Lithium Storage journal August 2019
Sandwich-Type Si@C/rGO Composite Stabilized by Polyetherimide-Derived Interface with Efficient Lithium Storage and High Rate Performance journal January 2019