title: 1-Aza-15-Crown-5 Functionalized Graphene Oxide for 2D Graphene-Based Li⁺-ion Conductor.
abstract: Attachment of Li(+) ion on graphene surface to realize Li(+)-ion conductor is a real challenge because of the weak interaction between the ions and the functional groups of graphene oxide; although, a large number of theoretical results are already available in the literature. To overcome this problem, graphene oxide is functionalized by 1-aza-15-crown-5, the cage-like structure containing four oxygens that can bind Li(+) ion through electrostatic interaction. Li(+) migration on graphene surface has been investigated using ac relaxation mechanism. Perfect Debye-type relaxation behavior with β (relaxation exponent) value ≈1 resulting from single ion is observed. The activation energy of Li(+) migration arising due to cation-π interaction is found to be 0.37 eV, which agrees well with recently reported theoretical value. It is believed that this study will help to design isolated ion conductors for Li(+)-ion battery.
authors.affiliation: Department of Materials Science, Indian Association for the Cultivation of Science, Jadavpur, Kolkata, 700032, India.
authors.forename: Moutusi
authors.initials: M
authors.lastname: Banerjee
authors.affiliation: Department of Materials Science, Indian Association for the Cultivation of Science, Jadavpur, Kolkata, 700032, India.
authors.forename: Abhisek
authors.initials: A
authors.lastname: Gupta
authors.affiliation: Department of Materials Science, Indian Association for the Cultivation of Science, Jadavpur, Kolkata, 700032, India.
authors.forename: Shyamal K
authors.initials: SK
authors.lastname: Saha
authors.affiliation: MLS Professor's Unit, Indian Association for the Cultivation of Science, Jadavpur, Kolkata, 700032, India.
authors.forename: Dipankar
authors.initials: D
authors.lastname: Chakravorty
keywords: Debye-type relaxation; graphene; graphene oxide, ionic conductors