摘要
Polyoxovanadate Na 6 V 10 O 28 is investigated for the first time as electrode material for supercapacitors (SCs). The electrochemical properties of Na 6 V 10 O 28 electrodes are studied in Li + -containing organic electrolyte (1M LiClO 4 in propylene carbonate) by galvanostatic charge/discharge and cyclic voltammetry in a three-electrode configuration. Na 6 V 10 O 28 electrodes exhibit high specific capacitances of up to 354 Fg -1 . An asymmetric SC with activated carbon as positive electrode and Na 6 V 10 O 28 as negative electrode is fabricated and exhibits a high energy density of 73 Whkg -1 with a power density of 312 Wkg -1 , which successfully demonstrates that Na 6 V 10 O 28 is a promising electrode material for high-energy SC applications. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.