Fast and reversible surface redox reaction in nanocrystalline vanadium nitride supercapacitors

被引:727
作者
Choi, Daiwon
Blomgren, George E.
Kumta, Prashant N. [1 ]
机构
[1] Carnegie Mellon Univ, Dept Mat Sci & Engn, Pittsburgh, PA 15213 USA
[2] Carnegie Mellon Univ, Dept Biomed Engn, Pittsburgh, PA 15213 USA
[3] Blomgren Consulting Serv Ltd, Lakewood, OH 44107 USA
关键词
D O I
10.1002/adma.200502471
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Modification of the surface chemistry of nanocrystalline VN yields a new class of supercapacitors that deliver an impressive specific capacitance. The creation of surface nanolayers of VOx (poor electronic conductivity) on the electronically conductive nanocrystalline VN shown in the figure-and on the cover gives rise to a series of reversible redox reactions that are thought to be responsible for the high capacitance. Application of the concept to other transition metals is expected to broaden the scope of supercapacitor materials.
引用
收藏
页码:1178 / +
页数:6
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