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Novel High-Pressure Nanocomposites for Cathode Materials in Sodium Batteries

A new nanocomposite material was prepared by high pressure processing of starting glass of nominal composition NaFePO [Formula: see text]. Thermal, structural, electrical and dielectric properties of the prepared samples were studied by differential thermal analysis (DTA), X-ray diffraction (XRD) an...

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Autores principales: Szpakiewicz-Szatan, Aleksander, Starzonek, Szymon, Pietrzak, Tomasz K., Garbarczyk, Jerzy E., Rzoska, Sylwester J., Boćkowski, Michał
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9824519/
https://www.ncbi.nlm.nih.gov/pubmed/36616074
http://dx.doi.org/10.3390/nano13010164
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author Szpakiewicz-Szatan, Aleksander
Starzonek, Szymon
Pietrzak, Tomasz K.
Garbarczyk, Jerzy E.
Rzoska, Sylwester J.
Boćkowski, Michał
author_facet Szpakiewicz-Szatan, Aleksander
Starzonek, Szymon
Pietrzak, Tomasz K.
Garbarczyk, Jerzy E.
Rzoska, Sylwester J.
Boćkowski, Michał
author_sort Szpakiewicz-Szatan, Aleksander
collection PubMed
description A new nanocomposite material was prepared by high pressure processing of starting glass of nominal composition NaFePO [Formula: see text]. Thermal, structural, electrical and dielectric properties of the prepared samples were studied by differential thermal analysis (DTA), X-ray diffraction (XRD) and broadband dielectric spectroscopy (BDS). It was demonstrated that high-pressure–high-temperature treatment (HPHT) led to an increase in the electrical conductivity of the initial glasses by two orders of magnitude. It was also shown that the observed effect was stronger than for the lithium analogue of this material studied by us earlier. The observed enhancement of conductivity was explained by Mott’s theory of electron hopping, which is more frequent in samples after pressure treatment. The final composite consisted of nanocrystalline NASICON (sodium (Na) Super Ionic CONductor) and alluaudite phases, which are electrochemically active in potential cathode materials for Na batteries. Average dimensions of crystallites estimated from XRD studies were between 40 and 90 nm, depending on the phase. Some new aspects of local dielectric relaxations in studied materials were also discussed. It was shown that a combination of high pressures and BDS method is a powerful method to study relaxation processes and molecular movements in solids. It was also pointed out that high-pressure cathode materials may exhibit higher volumetric capacities compared with commercially used cathodes with carbon additions.
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spelling pubmed-98245192023-01-08 Novel High-Pressure Nanocomposites for Cathode Materials in Sodium Batteries Szpakiewicz-Szatan, Aleksander Starzonek, Szymon Pietrzak, Tomasz K. Garbarczyk, Jerzy E. Rzoska, Sylwester J. Boćkowski, Michał Nanomaterials (Basel) Article A new nanocomposite material was prepared by high pressure processing of starting glass of nominal composition NaFePO [Formula: see text]. Thermal, structural, electrical and dielectric properties of the prepared samples were studied by differential thermal analysis (DTA), X-ray diffraction (XRD) and broadband dielectric spectroscopy (BDS). It was demonstrated that high-pressure–high-temperature treatment (HPHT) led to an increase in the electrical conductivity of the initial glasses by two orders of magnitude. It was also shown that the observed effect was stronger than for the lithium analogue of this material studied by us earlier. The observed enhancement of conductivity was explained by Mott’s theory of electron hopping, which is more frequent in samples after pressure treatment. The final composite consisted of nanocrystalline NASICON (sodium (Na) Super Ionic CONductor) and alluaudite phases, which are electrochemically active in potential cathode materials for Na batteries. Average dimensions of crystallites estimated from XRD studies were between 40 and 90 nm, depending on the phase. Some new aspects of local dielectric relaxations in studied materials were also discussed. It was shown that a combination of high pressures and BDS method is a powerful method to study relaxation processes and molecular movements in solids. It was also pointed out that high-pressure cathode materials may exhibit higher volumetric capacities compared with commercially used cathodes with carbon additions. MDPI 2022-12-30 /pmc/articles/PMC9824519/ /pubmed/36616074 http://dx.doi.org/10.3390/nano13010164 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Szpakiewicz-Szatan, Aleksander
Starzonek, Szymon
Pietrzak, Tomasz K.
Garbarczyk, Jerzy E.
Rzoska, Sylwester J.
Boćkowski, Michał
Novel High-Pressure Nanocomposites for Cathode Materials in Sodium Batteries
title Novel High-Pressure Nanocomposites for Cathode Materials in Sodium Batteries
title_full Novel High-Pressure Nanocomposites for Cathode Materials in Sodium Batteries
title_fullStr Novel High-Pressure Nanocomposites for Cathode Materials in Sodium Batteries
title_full_unstemmed Novel High-Pressure Nanocomposites for Cathode Materials in Sodium Batteries
title_short Novel High-Pressure Nanocomposites for Cathode Materials in Sodium Batteries
title_sort novel high-pressure nanocomposites for cathode materials in sodium batteries
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9824519/
https://www.ncbi.nlm.nih.gov/pubmed/36616074
http://dx.doi.org/10.3390/nano13010164
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