Electrochemical properties of graphene-MnO composite and hollow-structured MnO powders prepared by a simple one-pot spray pyrolysis process

Su Min Lee, Seung Ho Choi, Jung Kul Lee, Yun Chan Kang

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

Graphene-MnO composite and hollow-structured MnO powders are prepared by a simple one-pot spray pyrolysis process. The graphene content in the graphene-MnO composite powder is estimated to be 10 wt.%. The fine MnO crystals of size several tens of nanometers are uniformly distributed all over the graphene. The BET specific surface areas of the graphene-MnO composite and hollow-structured MnO powders are found to be 20 and 5 m2 g-1, respectively. The graphene-MnO composite powders have high initial discharge and charge capacities of 1207 and 849 mA h g-1, respectively, at a current density of 500 mA g-1. The initial discharge and charge capacities of the hollow-structured MnO powders are 1004 and 673 mA h g-1, respectively. The discharge capacities of the graphene-MnO composite and hollow-structured MnO powders for the 130th cycle are 1313 and 701 mA h g-1, respectively.

Original languageEnglish
Pages (from-to)441-447
Number of pages7
JournalElectrochimica Acta
Volume132
DOIs
Publication statusPublished - 2014 Jun 20
Externally publishedYes

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Spray pyrolysis
Graphite
Electrochemical properties
Powders
Graphene
Composite materials
Specific surface area
Current density
Crystals

Keywords

  • anode material
  • Graphene
  • lithium ion battery
  • manganese monoxide
  • spray pyrolysis

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

Cite this

Electrochemical properties of graphene-MnO composite and hollow-structured MnO powders prepared by a simple one-pot spray pyrolysis process. / Lee, Su Min; Choi, Seung Ho; Lee, Jung Kul; Kang, Yun Chan.

In: Electrochimica Acta, Vol. 132, 20.06.2014, p. 441-447.

Research output: Contribution to journalArticle

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AU - Choi, Seung Ho

AU - Lee, Jung Kul

AU - Kang, Yun Chan

PY - 2014/6/20

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AB - Graphene-MnO composite and hollow-structured MnO powders are prepared by a simple one-pot spray pyrolysis process. The graphene content in the graphene-MnO composite powder is estimated to be 10 wt.%. The fine MnO crystals of size several tens of nanometers are uniformly distributed all over the graphene. The BET specific surface areas of the graphene-MnO composite and hollow-structured MnO powders are found to be 20 and 5 m2 g-1, respectively. The graphene-MnO composite powders have high initial discharge and charge capacities of 1207 and 849 mA h g-1, respectively, at a current density of 500 mA g-1. The initial discharge and charge capacities of the hollow-structured MnO powders are 1004 and 673 mA h g-1, respectively. The discharge capacities of the graphene-MnO composite and hollow-structured MnO powders for the 130th cycle are 1313 and 701 mA h g-1, respectively.

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