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Selective formation of pyridinic-type nitrogen-doped graphene and its application in lithium-ion battery anodes

We report a high-yield single-step method for synthesizing nitrogen-doped graphene nanostripes (N-GNSPs) with an unprecedentedly high percentage of pyridinic-type doping (>86% of the nitrogen sites), and investigate the performance of the resulting N-GNSPs as a lithium-ion battery (LIB) anode mat...

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Detalles Bibliográficos
Autores principales: Bagley, Jacob D., Kumar, Deepan Kishore, See, Kimberly A., Yeh, Nai-Chang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9057402/
https://www.ncbi.nlm.nih.gov/pubmed/35515385
http://dx.doi.org/10.1039/d0ra06199a
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author Bagley, Jacob D.
Kumar, Deepan Kishore
See, Kimberly A.
Yeh, Nai-Chang
author_facet Bagley, Jacob D.
Kumar, Deepan Kishore
See, Kimberly A.
Yeh, Nai-Chang
author_sort Bagley, Jacob D.
collection PubMed
description We report a high-yield single-step method for synthesizing nitrogen-doped graphene nanostripes (N-GNSPs) with an unprecedentedly high percentage of pyridinic-type doping (>86% of the nitrogen sites), and investigate the performance of the resulting N-GNSPs as a lithium-ion battery (LIB) anode material. The as-grown N-GNSPs are compared with undoped GNSPs using scanning electron microscopy (SEM), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), helium ion-beam microscopy (HIM), and electrochemical methods. As an anode material we find that pyridinic-type N-GNSPs perform similarly to undoped GNSPs, suggesting that pyridinic sites alone are not responsible for the enhanced performance of nitrogen-doped graphene observed in previous studies, which contradicts common conjectures. In addition, post-mortem XPS measurements of nitrogen-doped graphene cycled as a lithium-ion battery anode are conducted for the first time, which reveal direct evidence for irreversible chemical changes at the nitrogen sites during cycling. These findings therefore provide new insights into the mechanistic models of doped graphene as LIB anodes, which are important in improving the anode designs for better LIB performance.
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spelling pubmed-90574022022-05-04 Selective formation of pyridinic-type nitrogen-doped graphene and its application in lithium-ion battery anodes Bagley, Jacob D. Kumar, Deepan Kishore See, Kimberly A. Yeh, Nai-Chang RSC Adv Chemistry We report a high-yield single-step method for synthesizing nitrogen-doped graphene nanostripes (N-GNSPs) with an unprecedentedly high percentage of pyridinic-type doping (>86% of the nitrogen sites), and investigate the performance of the resulting N-GNSPs as a lithium-ion battery (LIB) anode material. The as-grown N-GNSPs are compared with undoped GNSPs using scanning electron microscopy (SEM), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), helium ion-beam microscopy (HIM), and electrochemical methods. As an anode material we find that pyridinic-type N-GNSPs perform similarly to undoped GNSPs, suggesting that pyridinic sites alone are not responsible for the enhanced performance of nitrogen-doped graphene observed in previous studies, which contradicts common conjectures. In addition, post-mortem XPS measurements of nitrogen-doped graphene cycled as a lithium-ion battery anode are conducted for the first time, which reveal direct evidence for irreversible chemical changes at the nitrogen sites during cycling. These findings therefore provide new insights into the mechanistic models of doped graphene as LIB anodes, which are important in improving the anode designs for better LIB performance. The Royal Society of Chemistry 2020-10-29 /pmc/articles/PMC9057402/ /pubmed/35515385 http://dx.doi.org/10.1039/d0ra06199a Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Bagley, Jacob D.
Kumar, Deepan Kishore
See, Kimberly A.
Yeh, Nai-Chang
Selective formation of pyridinic-type nitrogen-doped graphene and its application in lithium-ion battery anodes
title Selective formation of pyridinic-type nitrogen-doped graphene and its application in lithium-ion battery anodes
title_full Selective formation of pyridinic-type nitrogen-doped graphene and its application in lithium-ion battery anodes
title_fullStr Selective formation of pyridinic-type nitrogen-doped graphene and its application in lithium-ion battery anodes
title_full_unstemmed Selective formation of pyridinic-type nitrogen-doped graphene and its application in lithium-ion battery anodes
title_short Selective formation of pyridinic-type nitrogen-doped graphene and its application in lithium-ion battery anodes
title_sort selective formation of pyridinic-type nitrogen-doped graphene and its application in lithium-ion battery anodes
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9057402/
https://www.ncbi.nlm.nih.gov/pubmed/35515385
http://dx.doi.org/10.1039/d0ra06199a
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