A Copper Silicide Nanofoam Current Collector for Directly Grown Si Nanowire Networks and their Application as Lithium-Ion Anodes

Ibrahim Saana Aminu, Hugh Geaney, Sumair Imtiaz, Temilade E. Adegoke, Nilotpal Kapuria, Gearoid A. Collins, Kevin M. Ryan

Research output: Contribution to journalArticlepeer-review

Abstract

Silicon nanowires (Si NWs) have been identified as an excellent candidate material for the replacement of graphite in anodes, allowing for a significant boost in the capacity of lithium-ion batteries (LIBs). Herein, high-density Si NWs are grown on a novel 3D interconnected network of binary-phase Cu-silicide nanofoam (3D CuxSiy NF) substrate. The nanofoam facilitates the uniform distribution of well-segregated and small-sized catalyst seeds, leading to high-density/single-phase Si NW growth with an areal-loading in excess of 1.0 mg cm−2 and a stable areal capacity of ≈2.0 mAh cm−2 after 550 cycles. The use of the 3D CuxSiy NF as a substrate is further extended for Al, Bi, Cu, In, Mn, Ni, Sb, Sn, and Zn mediated Si NW growth, demonstrating the general applicability of the anode architecture.

Original languageEnglish
Article number2003278
JournalAdvanced Functional Materials
Volume30
Issue number38
DOIs
Publication statusPublished - 1 Sep 2020

Keywords

  • 3D CuSi nanofoam
  • areal capacity
  • high density
  • lithium-ion battery
  • silicon nanowires

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