Electrosprayed graphene films decorated with bimetallic (zinc-iron) oxide for lithium-ion battery anodes

Bhavana Joshi, Edmund Samuel, Min Woo Kim, Karam Kim, Tae Gun Kim, Mark T. Swihart, Wooyoung Yoon, Suk Goo Yoon

Research output: Contribution to journalArticle

Abstract

Bimetallic (zinc-iron) oxide with a pillar-like morphology is decorated over graphene films. The electrosprayed composite demonstrates good electrochemical performance as an anode material for lithium-ion batteries. Scanning and transmission electron microscopy images confirm the effective decoration of graphene sheets with bimetallic Zn-Fe oxide particles. The composite shows a high capacity of 1601 mAh⋅g−1 at 100 mA·g−1 owing to its unique layer-particle morphology. The anode material exhibits excellent capacity retention of 77% (∼1235 mAh⋅g−1 at 100 mA·g−1) after 100 cycles, due to buffering of volumetric strain in the metal oxide by flexible conductive graphene sheets. Zinc forms an alloy with the lithium ions, and the graphene sheets prevent particle agglomeration, keeping transport distances within particles small. Thus, synthesizing a composite of graphene with Zn-Fe oxides via electrospray deposition is a promising method for preparing high-performance anode materials for lithium-ion batteries.

Original languageEnglish
Pages (from-to)699-708
Number of pages10
JournalJournal of Alloys and Compounds
DOIs
Publication statusPublished - 2019 Apr 25

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Graphite
Zinc oxide
Iron oxides
Graphene
Anodes
Oxides
Composite materials
Lithium
Zinc
Agglomeration
Metals
Lithium-ion batteries
ferric oxide
Ions
Transmission electron microscopy
Scanning electron microscopy

Keywords

  • Anode
  • Electrospray
  • Graphene
  • LIB
  • ZnFeO

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

Electrosprayed graphene films decorated with bimetallic (zinc-iron) oxide for lithium-ion battery anodes. / Joshi, Bhavana; Samuel, Edmund; Kim, Min Woo; Kim, Karam; Kim, Tae Gun; Swihart, Mark T.; Yoon, Wooyoung; Yoon, Suk Goo.

In: Journal of Alloys and Compounds, 25.04.2019, p. 699-708.

Research output: Contribution to journalArticle

Joshi, Bhavana ; Samuel, Edmund ; Kim, Min Woo ; Kim, Karam ; Kim, Tae Gun ; Swihart, Mark T. ; Yoon, Wooyoung ; Yoon, Suk Goo. / Electrosprayed graphene films decorated with bimetallic (zinc-iron) oxide for lithium-ion battery anodes. In: Journal of Alloys and Compounds. 2019 ; pp. 699-708.
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