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1‐Aza‐15‐Crown‐5 Functionalized Graphene Oxide for 2D Graphene‐Based Li + ‐ion Conductor
Author(s) -
Banerjee Moutusi,
Gupta Abhisek,
Saha Shyamal K.,
Chakravorty Dipankar
Publication year - 2015
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201500200
Subject(s) - graphene , oxide , conductor , materials science , ion , nanotechnology , graphene oxide paper , graphene nanoribbons , crown (dentistry) , inorganic chemistry , chemistry , composite material , organic chemistry , metallurgy
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.