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Cover Picture: Fast and Reversible Surface Redox Reaction in Nanocrystalline Vanadium Nitride Supercapacitors (Adv. Mater. 9/2006)
Author(s) -
Choi D.,
Blomgren G. E.,
Kumta P. N.
Publication year - 2006
Publication title -
advanced materials
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200690036
Subject(s) - vanadium nitride , materials science , nanocrystalline material , redox , supercapacitor , vanadium , transmission electron microscopy , transition metal , nitride , chemical engineering , nanotechnology , capacitance , electrode , metallurgy , catalysis , organic chemistry , chemistry , layer (electronics) , engineering
The cover shows a high magnification transmission electron microscopy image of VN nanoparticles that exhibit enhanced supercapacitor response. The high capacitance is due to V undergoing a series of highly reversible redox reactions. These involve a transition between II–IV oxidation states via hydroxyl bonding confined to a few atomic layers of vanadium oxides formed on the surface of the underlying nitride, as discussed by Kumta and co‐workers on p. 1178.