Journal article
Partial breaking of the Coulombic ordering of ionic liquids confined in carbon nanopores
Nature materials, v 16(12), pp 1225-1232
2017
PMID: 28920938
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Ionic liquids are composed of equal quantities of positive and negative ions. In the bulk, electrical neutrality occurs in these liquids due to Coulombic ordering, in which ion shells of alternating charge form around a central ion. Their structure under confinement is far less well understood. This hinders the widespread application of ionic liquids in technological applications. Here we use scattering experiments to resolve the structure of a widely used ionic liquid (EMI–TFSI) when it is confined inside nanoporous carbons. We show that Coulombic ordering reduces when the pores can accommodate only a single layer of ions. Instead, equally charged ion pairs are formed due to the induction of an electric potential of opposite sign in the carbon pore walls. This non-Coulombic ordering is further enhanced in the presence of an applied external electric potential. This finding opens the door for the design of better materials for electrochemical applications.
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Details
- Title
- Partial breaking of the Coulombic ordering of ionic liquids confined in carbon nanopores
- Creators
- Ryusuke Futamura - Shinshu University [Nagano]Taku Iiyama - Shinshu University [Nagano]Yuma Takasaki - Shinshu University [Nagano]Yury Gogotsi - Shinshu University [Nagano]Mark J Biggs - Loughborough UniversityMathieu Salanne - Réseau sur le stockage électrochimique de l'énergieJulie Segalini - Centre interuniversitaire de recherche et d'ingenierie des matériauxPatrice Simon - Shinshu University [Nagano]Katsumi Kaneko - Shinshu University [Nagano]
- Publication Details
- Nature materials, v 16(12), pp 1225-1232
- Publisher
- Nature Publishing Group
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000416159700016
- Scopus ID
- 2-s2.0-85034658618
- Other Identifier
- 991014969764704721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Physics, Applied
- Physics, Condensed Matter