Insights into the formation of metal carbon nanocomposites for energy storage using hybrid NiFe layered double hydroxides as precursors
Romero J, Varela M, Assebban M, Oestreicher V, Guedeja-Marron A, Jorda JL, Abellán G, Coronado E (2020)
Publication Type: Journal article
Publication year: 2020
Journal
Book Volume: 11
Pages Range: 7626-7633
Journal Issue: 29
DOI: 10.1039/d0sc00697a
Abstract
NiFe-carbon magnetic nanocomposites prepared using hybrid sebacate intercalated layered double hydroxides (LDHs) as precursors are shown to be of interest as supercapacitors. Here, the low-temperature formation mechanism of these materials has been deciphered by means of a combined study using complementary in situ (temperature-dependent) techniques. Specifically, studies involving X-ray powder diffraction, thermogravimetry coupled to mass spectrometry (TG-MS), statistical Raman spectroscopy (SRS), aberration-corrected scanning transmission electron microscopy (STEM) and electron energy-loss spectroscopy (EELS) have been carried out. The experimental results confirm the early formation of FeNi3 nanoparticles at ca. 200-250 °C, preceding the concerted collapse of the starting NiFe-LDH laminar structure over just 50 °C (from 350 to 400 °C). At the same time, the catalytic interactions between the metallic atoms and the organic molecules permit the concomitant formation of a graphitic carbon matrix leading to the formation of the final FeNi3-carbon nanocomposite. Furthermore, in situ temperature-dependent experiments in the presence of the intrinsic magnetic field of the STEM-EELS allow observing the complete metal segregation of Ni and Fe even at 400 °C. These results provide fundamental insights into the catalytic formation of carbon-based nanocomposites using LDHs as precursors and pave the way for the fine-tuning of their properties, with special interest in the field of energy storage and conversion. This journal is
Authors with CRIS profile
Involved external institutions
Universidad Complutense de Madrid (UCM)
Spain (ES)
Polytechnic University of Valencia / Universidad Politécnica de Valencia
Spain (ES)
University of València / Universitat de València
Spain (ES)
Spain (ES)
Polytechnic University of Valencia / Universidad Politécnica de Valencia
Spain (ES)
University of València / Universitat de València
Spain (ES)
How to cite
APA:
Romero, J., Varela, M., Assebban, M., Oestreicher, V., Guedeja-Marron, A., Jorda, J.L.,... Coronado, E. (2020). Insights into the formation of metal carbon nanocomposites for energy storage using hybrid NiFe layered double hydroxides as precursors. Chemical Science, 11(29), 7626-7633. https://dx.doi.org/10.1039/d0sc00697a
MLA:
Romero, Jorge, et al. "Insights into the formation of metal carbon nanocomposites for energy storage using hybrid NiFe layered double hydroxides as precursors." Chemical Science 11.29 (2020): 7626-7633.
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