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Is graphite lithiophobic or lithiophilic?

Graphite and lithium metal are two classic anode materials and their composite has shown promising performance for rechargeable batteries. However, it is generally accepted that Li metal wets graphite poorly, causing its spreading and infiltration difficult. Here we show that graphite can either app...

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Autores principales: Duan, Jian, Zheng, Yuheng, Luo, Wei, Wu, Wangyan, Wang, Tengrui, Xie, Yong, Li, Sa, Li, Ju, Huang, Yunhui
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Oxford University Press 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8288999/
https://www.ncbi.nlm.nih.gov/pubmed/34692145
http://dx.doi.org/10.1093/nsr/nwz222
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author Duan, Jian
Zheng, Yuheng
Luo, Wei
Wu, Wangyan
Wang, Tengrui
Xie, Yong
Li, Sa
Li, Ju
Huang, Yunhui
author_facet Duan, Jian
Zheng, Yuheng
Luo, Wei
Wu, Wangyan
Wang, Tengrui
Xie, Yong
Li, Sa
Li, Ju
Huang, Yunhui
author_sort Duan, Jian
collection PubMed
description Graphite and lithium metal are two classic anode materials and their composite has shown promising performance for rechargeable batteries. However, it is generally accepted that Li metal wets graphite poorly, causing its spreading and infiltration difficult. Here we show that graphite can either appear superlithiophilic or lithiophobic, depending on the local redox potential. By comparing the wetting performance of highly ordered pyrolytic graphite, porous carbon paper (PCP), lithiated PCP and graphite powder, we demonstrate that the surface contaminants that pin the contact-line motion and cause contact-angle hysteresis have their own electrochemical-stability windows. The surface contaminants can be either removed or reinforced in a time-dependent manner, depending on whether the reducing agents (C(6)→LiC(6)) or the oxidizing agents (air, moisture) dominate in the ambient environment, leading to bifurcating dynamics of either superfast or superslow wetting. Our findings enable new fabrication technology for Li–graphite composite with a controllable Li-metal/graphite ratio and present great promise for the mass production of Li-based anodes for use in high-energy-density batteries.
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spelling pubmed-82889992021-10-21 Is graphite lithiophobic or lithiophilic? Duan, Jian Zheng, Yuheng Luo, Wei Wu, Wangyan Wang, Tengrui Xie, Yong Li, Sa Li, Ju Huang, Yunhui Natl Sci Rev Research Article Graphite and lithium metal are two classic anode materials and their composite has shown promising performance for rechargeable batteries. However, it is generally accepted that Li metal wets graphite poorly, causing its spreading and infiltration difficult. Here we show that graphite can either appear superlithiophilic or lithiophobic, depending on the local redox potential. By comparing the wetting performance of highly ordered pyrolytic graphite, porous carbon paper (PCP), lithiated PCP and graphite powder, we demonstrate that the surface contaminants that pin the contact-line motion and cause contact-angle hysteresis have their own electrochemical-stability windows. The surface contaminants can be either removed or reinforced in a time-dependent manner, depending on whether the reducing agents (C(6)→LiC(6)) or the oxidizing agents (air, moisture) dominate in the ambient environment, leading to bifurcating dynamics of either superfast or superslow wetting. Our findings enable new fabrication technology for Li–graphite composite with a controllable Li-metal/graphite ratio and present great promise for the mass production of Li-based anodes for use in high-energy-density batteries. Oxford University Press 2020-07 2020-01-03 /pmc/articles/PMC8288999/ /pubmed/34692145 http://dx.doi.org/10.1093/nsr/nwz222 Text en © The Author(s) 2020. Published by Oxford University Press on behalf of China Science Publishing & Media Ltd. https://creativecommons.org/licenses/by/4.0/This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) ), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Article
Duan, Jian
Zheng, Yuheng
Luo, Wei
Wu, Wangyan
Wang, Tengrui
Xie, Yong
Li, Sa
Li, Ju
Huang, Yunhui
Is graphite lithiophobic or lithiophilic?
title Is graphite lithiophobic or lithiophilic?
title_full Is graphite lithiophobic or lithiophilic?
title_fullStr Is graphite lithiophobic or lithiophilic?
title_full_unstemmed Is graphite lithiophobic or lithiophilic?
title_short Is graphite lithiophobic or lithiophilic?
title_sort is graphite lithiophobic or lithiophilic?
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8288999/
https://www.ncbi.nlm.nih.gov/pubmed/34692145
http://dx.doi.org/10.1093/nsr/nwz222
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