In Situ Hydrothermal Synthesis of Mn3O4 Nanoparticles on Nitrogen-doped Graphene as High-Performance Anode materials for Lithium Ion Batteries
- Authors
- 유승호
- Issue Date
- 2월-2014
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- anode; doping; graphene; lithium ion battery; manganese oxide
- Citation
- ELECTROCHIMICA ACTA, v.120, pp.452 - 459
- Indexed
- SCIE
SCOPUS
- Journal Title
- ELECTROCHIMICA ACTA
- Volume
- 120
- Start Page
- 452
- End Page
- 459
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/139969
- DOI
- 10.1016/j.electacta.2013.12.018
- ISSN
- 0013-4686
- 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 Mn3O4 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 Mn3O4/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 b
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