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.
Bibliographical noteFunding Information:
2E28142, 2N53720). This research was also supported by the Technology Development Program to Solve Climate Changes and Basic Science Research Program of the National Research Foundation (NRF) funded by the Ministry of Science & ICT (grant number: 2017M1A2A2044482, 2018R1A2B2007081).
This work was supported by the Korea Institute of Science and Technology (KIST) Institutional Programs (Project No.
© 2018 The Royal Society of Chemistry.
ASJC Scopus subject areas
- Materials Science(all)