Coaxial-nanostructured MnFe2O4 nanoparticles on polydopamine-coated MWCNT for anode materials in rechargeable batteries
- Authors
- Kim, Hyeongwoo; Lee, Jong-Won; Byun, Dongjin; Choi, Wonchang
- Issue Date
- 28-10월-2018
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- NANOSCALE, v.10, no.40
- Indexed
- SCIE
SCOPUS
- Journal Title
- NANOSCALE
- Volume
- 10
- Number
- 40
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/72433
- DOI
- 10.1039/c8nr04555k
- ISSN
- 2040-3364
- Abstract
- MnFe2O4@PDA-coated MWCNT coaxial nanocables are successfully designed via a simple one-pot process by utilizing the adhesion property of polydopamine (PDA) with cations in aqueous solutions and employing a modified co-precipitation synthesis at a low temperature. The incorporation of the PDA coating layer on the MWCNT leads to the well-dispersed state of the MWCNTs in the aqueous solution due to the hydrophilic functional group of the PDA coating layer. In addition, the catechol-based functional group of the PDA coating layer effectively anchors the Mn and Fe ions from the aqueous solution before the co-precipitation process, eventually resulting in the preferential and homogeneous formation of MnFe2O4 nanoparticles on the MWCNT. The final MnFe2O4@PDA-coated MWCNT electrode exhibits excellent power characteristics such as a high rate capacity of around of 367 mA h g(-1) at a 5C-rate condition (= 4585 mA g(-1)). Cycling tests reveal that the stable performance of the MnFe2O4@PDA-coated MWCNT electrode persists even after 350 cycles.
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