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Micro- and nanostructures of Ni-based ternary compounds with applications in sensors and batteries

García-Alonso, Javier and Nahirniak, Svitlana and Maestre, David and Saruhan-Brings, Bilge and Cremades, Ana (2021) Micro- and nanostructures of Ni-based ternary compounds with applications in sensors and batteries. EUROPEAN CONGRESS AND EXHIBITION ON ADVANCED MATERIALS AND PROCESSES - EUROMAT 2021, 13-17 Sep 2021, Virtual Conference.

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Abstract

The development of low dimensional micro- and nanostructures of ternary compounds with controlled morphology and composition is recently gaining increasing attention due to their improved functionalities and enhanced performance in diverse fields of research. However, their fabrication is not an easy task and diverse synthesis approaches have been followed so far. In this work Ni-based ternary compounds in form of nano- and microstructures have been synthesized following different physical and chemical routes. NiGa2O4 elongated micro- and nanostructures were fabricated by a vapor-solid method using a controlled mixture of Ga2O3, metallic Ni and Ga as precursors. In that case, thermal treatments at 1400-1500 °C under a controlled Ar atmosphere lead to the growth of nanoneedles and rods with lengths up to several microns, following an autocatalytic process. On the other hand, a co-precipitation route was used for the synthesis of NMC compositions in submicrometric core/shell structures leading to the formation of Ni-rich core and Mn-rich shell at each particle, including Ni-ternary compounds. Electron microscopy techniques (SEM, TEM) were employed for the morphological analysis of the Ni-based ternary nano- and microstructures. The structure and composition of the obtained samples, as well as the presence of NiO or other secondary phases have been analysed by x-ray diffraction and energy dispersive x-ray spectroscopy (EDS). Photoluminescence and Raman spectroscopy using variable excitation conditions and micrometric resolution have been employed for the analysis of the samples. Special attention has been paid to the study of the vibrational modes of the Ni-based ternary compounds, as the identification and understanding of some Raman modes still remains controversial in these materials. These micro and nanostructures have demonstrated potential applicability as electrodes in Li-ion batteries, as well as in sensors and photodetectors.

Item URL in elib:https://elib.dlr.de/145458/
Document Type:Conference or Workshop Item (Speech)
Title:Micro- and nanostructures of Ni-based ternary compounds with applications in sensors and batteries
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
García-Alonso, JavierUNSPECIFIEDUNSPECIFIED
Nahirniak, SvitlanaSvitlana.Nahirniak (at) dlr.dehttps://orcid.org/0000-0001-5252-8737
Maestre, DavidUNSPECIFIEDUNSPECIFIED
Saruhan-Brings, BilgeBilge.Saruhan (at) dlr.deUNSPECIFIED
Cremades, AnaUNSPECIFIEDUNSPECIFIED
Date:September 2021
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:ternary compounds; sensors; batteries; nanostructures
Event Title:EUROPEAN CONGRESS AND EXHIBITION ON ADVANCED MATERIALS AND PROCESSES - EUROMAT 2021
Event Location:Virtual Conference
Event Type:international Conference
Event Dates:13-17 Sep 2021
Organizer:Federation of European Materials Societies, Austrian Society for Metallurgy and Materials
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Clean Propulsion
DLR - Research area:Aeronautics
DLR - Program:L CP - Clean Propulsion
DLR - Research theme (Project):L - Advanced Materials and New Manufacturing Technologies
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > High Temperature and Functional Coatings
Deposited By: Nahirniak, Svitlana
Deposited On:24 Nov 2021 09:50
Last Modified:24 Nov 2021 09:50

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