Vertically-aligned graphene nanowalls grown via plasma-enhanced chemical vapor deposition as a binder-free cathode in Li-O2 batteries

Chih Pin Han, Vediyappan Veeramani, Chen Chih Hsu, Anirudha Jena, Ho Chang, Nai Chang Yeh, Shu Fen Hu, Ru Shi Liu

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

In the present report, vertically-aligned graphene nanowalls are grown on Ni foam (VA-G/NF) using plasma-enhanced chemical vapor deposition method at room temperature. Optimization of the growth conditions provides graphene sheets with controlled defect sites. The unique architecture of the vertically-aligned graphene sheets allows sufficient space for the ionic movement within the sheets and hence enhancing the catalytic activity. Further modification with ruthenium nanoparticles (Ru NPs) drop-casted on VA-G/NF improves the charge overpotential for lithium-oxygen (Li-O2) battery cycles. Such reduction we believe is due to the easier passage of ions between the perpendicularly standing graphene sheets thereby providing ionic channels.

Original languageEnglish
Article number505401
JournalNanotechnology
Volume29
Issue number50
DOIs
Publication statusPublished - 2018 Oct 11

Keywords

  • LiO battery
  • Ru nanoparticles
  • electrocatalyst
  • graphene nanowall

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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