Stable High-Capacity Lithium Ion Battery Anodes Produced by Supersonic Spray Deposition of Hematite Nanoparticles and Self-Healing Reduced Graphene Oxide

Jong Gun Lee, Bhavana N. Joshi, Jong Hyuk Lee, Tae Gun Kim, Do Yeon Kim, Salem S. Al-Deyab, Il Won Seong, Mark T. Swihart, Wooyoung Yoon, Suk Goo Yoon

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Hematite (Fe2O3) nanoparticles and reduced graphene oxide (rGO) were supersonically sprayed onto copper current collectors to create high-performance, binder-free lithium ion battery (LIB) electrodes. Supersonic spray deposition is rapid, low-cost, and suitable for large-scale production. Supersonic impact of rGO sheets and Fe2O3 nanoparticles on the substrate produces compacted nanocomposite films with short diffusion lengths for Li+ ions. This structure produces high reversible capacity and markedly improved capacity retention over many cycles. Decomposition of lithium oxide generated during cycling activates the solid electrolyte interface layer, contributing to high capacity retention. The optimal composition ratio of rGO to Fe2O3 was 9.1 wt.%, which produced a reversible capacity of 1242 mAh g−1 after N = 305 cycles at a current density of 1000 mA g−1 (1C).

Original languageEnglish
Pages (from-to)604-610
Number of pages7
JournalElectrochimica Acta
Volume228
DOIs
Publication statusPublished - 2017 Feb 20

Keywords

  • Anode
  • Hematite
  • Iron oxide
  • Lithim ion battery
  • Reduced graphene oxide
  • Supersonic spray coating

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

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