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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/23982

Title: Lithium-ion battery electrolyte mobility at nano-confined graphene interfaces
Authors: Moeremans, Boaz
Cheng, Hsiu-Wei
Hu, Qingyun
Garces, Hector F.
Padture, Nitin P.
Renner, Frank Uwe
Valtiner, Markus
Issue Date: 2016
Citation: NATURE COMMUNICATIONS, 7, p. 1-7 (Art N° 12693)
Abstract: 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.
URI: http://hdl.handle.net/1942/23982
DOI: 10.1038/ncomms12693
ISI #: 000383740100001
ISSN: 2041-1723
Category: A1
Type: Journal Contribution
Validation: ecoom, 2017
Appears in Collections: Research publications

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