In situ hydrothermal synthesis of Mn3O4 nanoparticles on nitrogen-doped graphene as high-performance anode materials for lithium ion batteries

Seung Keun Park, Aihua Jin, Seung Ho Yu, Jeonghyun Ha, Byungchul Jang, Sungyool Bong, Seunghee Woo, Yung Eun Sung, Yuanzhe Piao

Research output: Contribution to journalArticlepeer-review

117 Citations (Scopus)

Abstract

Developing new electrode materials with high specific capacity for excellent lithium ion storage properties is very desirable. In this paper, we introduce a simple hydrothermal method for the growth of Mn3O 4 nanoparticles onto nitrogen-doped graphene (N-doped graphene) for high-performance lithium ion battery (LIB) anodes. Hydrazine plays a fundamental role in the formation of such nanostructures as it can act both as a reducing agent and as a nitrogen source. In the synthesized composite, highly crystalline Mn3O4 nanoparticles with average sizes of 20-50 nm are homogeneously dispersed on both sides of the N-doped graphene. The nitrogen content in the doped graphene is confirmed by elemental analyzer, and 2 wt% of the sample is found to be composed of nitrogen element. The as-prepared Mn 3O4/N-doped graphene composites exhibit remarkable electrochemical performance, including high reversible specific capacity, outstanding cycling stability, and excellent rate capability (approximately 400 mA h g-1 at 2.0 A g-1) when used as the anode material for LIBs. The improvement in the electrochemical properties of the material can be attributed to graphene, which acts as both an electron conductor and a volume buffer layer, and nitrogen doping allows for fast electron and ion transfer by decreasing the energy barrier. This type of metal oxide/N-doped graphene composites can be promising candidates for high-performance anode materials for LIBs.

Original languageEnglish
Pages (from-to)452-459
Number of pages8
JournalElectrochimica Acta
Volume120
DOIs
Publication statusPublished - 2014 Feb 20
Externally publishedYes

Keywords

  • anode
  • doping
  • graphene
  • lithium ion battery
  • manganese oxide

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

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