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High-performance SiGe anode materials obtained by dealloying a Sr-modified Al–Si–Ge eutectic precursor

In exploring the anode materials for high efficiency Li-ion batteries, it has been found that the electrochemical performance of Si can be enhanced via alloying with Ge. In the present work, we modified the Al–Si–Ge eutectic ribbons as the precursor by adding a trace of Sr to the alloy. The SiGe par...

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Autores principales: Zhang, Huajie, Li, Jinfu
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9844252/
https://www.ncbi.nlm.nih.gov/pubmed/36741144
http://dx.doi.org/10.1039/d2ra07674h
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author Zhang, Huajie
Li, Jinfu
author_facet Zhang, Huajie
Li, Jinfu
author_sort Zhang, Huajie
collection PubMed
description In exploring the anode materials for high efficiency Li-ion batteries, it has been found that the electrochemical performance of Si can be enhanced via alloying with Ge. In the present work, we modified the Al–Si–Ge eutectic ribbons as the precursor by adding a trace of Sr to the alloy. The SiGe particles obtained by dealloying the Al–Si–Ge eutectic precursor have a porous coral-like nano-architecture with numerous fibrous branches towards various directions. Because of the large surface area and porosity, the as-prepared Sr-modified SiGe anode delivers an excellent capacity of 1166.6 mA h g(−1) at 0.1 A g(−1) after 100 cycles with a fantastic initial coulombic efficiency of 83.62%. Besides, it has a superior rate performance with a reversible capacity of 675.3 mA h g(−1) at the current density of 8 A g(−1). It is demonstrated that the modification treatment that is widely used in metallurgy is also a promising strategy to synthesize high-performance battery electrodes and other energy storage materials.
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spelling pubmed-98442522023-02-03 High-performance SiGe anode materials obtained by dealloying a Sr-modified Al–Si–Ge eutectic precursor Zhang, Huajie Li, Jinfu RSC Adv Chemistry In exploring the anode materials for high efficiency Li-ion batteries, it has been found that the electrochemical performance of Si can be enhanced via alloying with Ge. In the present work, we modified the Al–Si–Ge eutectic ribbons as the precursor by adding a trace of Sr to the alloy. The SiGe particles obtained by dealloying the Al–Si–Ge eutectic precursor have a porous coral-like nano-architecture with numerous fibrous branches towards various directions. Because of the large surface area and porosity, the as-prepared Sr-modified SiGe anode delivers an excellent capacity of 1166.6 mA h g(−1) at 0.1 A g(−1) after 100 cycles with a fantastic initial coulombic efficiency of 83.62%. Besides, it has a superior rate performance with a reversible capacity of 675.3 mA h g(−1) at the current density of 8 A g(−1). It is demonstrated that the modification treatment that is widely used in metallurgy is also a promising strategy to synthesize high-performance battery electrodes and other energy storage materials. The Royal Society of Chemistry 2023-01-17 /pmc/articles/PMC9844252/ /pubmed/36741144 http://dx.doi.org/10.1039/d2ra07674h Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Zhang, Huajie
Li, Jinfu
High-performance SiGe anode materials obtained by dealloying a Sr-modified Al–Si–Ge eutectic precursor
title High-performance SiGe anode materials obtained by dealloying a Sr-modified Al–Si–Ge eutectic precursor
title_full High-performance SiGe anode materials obtained by dealloying a Sr-modified Al–Si–Ge eutectic precursor
title_fullStr High-performance SiGe anode materials obtained by dealloying a Sr-modified Al–Si–Ge eutectic precursor
title_full_unstemmed High-performance SiGe anode materials obtained by dealloying a Sr-modified Al–Si–Ge eutectic precursor
title_short High-performance SiGe anode materials obtained by dealloying a Sr-modified Al–Si–Ge eutectic precursor
title_sort high-performance sige anode materials obtained by dealloying a sr-modified al–si–ge eutectic precursor
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9844252/
https://www.ncbi.nlm.nih.gov/pubmed/36741144
http://dx.doi.org/10.1039/d2ra07674h
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