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Lithium-ion battery electrolyte mobility at nano-confined graphene interfaces

Interfaces are essential in electrochemical processes, providing a critical nanoscopic design feature for composite electrodes used in Li-ion batteries. Understanding the structure, wetting and mobility at nano-confined interfaces is important for improving the efficiency and lifetime of electrochem...

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Autores principales: Moeremans, Boaz, Cheng, Hsiu-Wei, Hu, Qingyun, Garces, Hector F., Padture, Nitin P., Renner, Frank Uwe, Valtiner, Markus
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5007463/
https://www.ncbi.nlm.nih.gov/pubmed/27562148
http://dx.doi.org/10.1038/ncomms12693
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author Moeremans, Boaz
Cheng, Hsiu-Wei
Hu, Qingyun
Garces, Hector F.
Padture, Nitin P.
Renner, Frank Uwe
Valtiner, Markus
author_facet Moeremans, Boaz
Cheng, Hsiu-Wei
Hu, Qingyun
Garces, Hector F.
Padture, Nitin P.
Renner, Frank Uwe
Valtiner, Markus
author_sort Moeremans, Boaz
collection PubMed
description Interfaces are essential in electrochemical processes, providing a critical nanoscopic design feature for composite electrodes used in Li-ion batteries. Understanding the structure, wetting and mobility at nano-confined interfaces is important for improving the efficiency and lifetime of electrochemical devices. Here we use a Surface Forces Apparatus to quantify the initial wetting of nanometre-confined graphene, gold and mica surfaces by Li-ion battery electrolytes. Our results indicate preferential wetting of confined graphene in comparison with gold or mica surfaces because of specific interactions of the electrolyte with the graphene surface. In addition, wetting of a confined pore proceeds via a profoundly different mechanism compared with wetting of a macroscopic surface. We further reveal the existence of molecularly layered structures of the confined electrolyte. Nanoscopic confinement of less than 4–5 nm and the presence of water decrease the mobility of the electrolyte. These results suggest a lower limit for the pore diameter in nanostructured electrodes.
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spelling pubmed-50074632016-09-14 Lithium-ion battery electrolyte mobility at nano-confined graphene interfaces Moeremans, Boaz Cheng, Hsiu-Wei Hu, Qingyun Garces, Hector F. Padture, Nitin P. Renner, Frank Uwe Valtiner, Markus Nat Commun Article Interfaces are essential in electrochemical processes, providing a critical nanoscopic design feature for composite electrodes used in Li-ion batteries. Understanding the structure, wetting and mobility at nano-confined interfaces is important for improving the efficiency and lifetime of electrochemical devices. Here we use a Surface Forces Apparatus to quantify the initial wetting of nanometre-confined graphene, gold and mica surfaces by Li-ion battery electrolytes. Our results indicate preferential wetting of confined graphene in comparison with gold or mica surfaces because of specific interactions of the electrolyte with the graphene surface. In addition, wetting of a confined pore proceeds via a profoundly different mechanism compared with wetting of a macroscopic surface. We further reveal the existence of molecularly layered structures of the confined electrolyte. Nanoscopic confinement of less than 4–5 nm and the presence of water decrease the mobility of the electrolyte. These results suggest a lower limit for the pore diameter in nanostructured electrodes. Nature Publishing Group 2016-08-26 /pmc/articles/PMC5007463/ /pubmed/27562148 http://dx.doi.org/10.1038/ncomms12693 Text en Copyright © 2016, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Moeremans, Boaz
Cheng, Hsiu-Wei
Hu, Qingyun
Garces, Hector F.
Padture, Nitin P.
Renner, Frank Uwe
Valtiner, Markus
Lithium-ion battery electrolyte mobility at nano-confined graphene interfaces
title Lithium-ion battery electrolyte mobility at nano-confined graphene interfaces
title_full Lithium-ion battery electrolyte mobility at nano-confined graphene interfaces
title_fullStr Lithium-ion battery electrolyte mobility at nano-confined graphene interfaces
title_full_unstemmed Lithium-ion battery electrolyte mobility at nano-confined graphene interfaces
title_short Lithium-ion battery electrolyte mobility at nano-confined graphene interfaces
title_sort lithium-ion battery electrolyte mobility at nano-confined graphene interfaces
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5007463/
https://www.ncbi.nlm.nih.gov/pubmed/27562148
http://dx.doi.org/10.1038/ncomms12693
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