Polyoxometalate(POM)-based molecular cluster batteries have attracted wide interest due to their rich redox properties.To date,no studies on POM-based ionic crystals for LIBs have been reported,although the redox-acti...Polyoxometalate(POM)-based molecular cluster batteries have attracted wide interest due to their rich redox properties.To date,no studies on POM-based ionic crystals for LIBs have been reported,although the redox-active metals can be incorporated and finely tuned in the ionic crystals.Herein,a POM-based ionic crystal(denoted as Composite 1)was prepared for the first time by the complexation of the trinuclear acetate-bridged cobalt-containing macrocation([Co_(3)O(CH_(3)CO_(2))_(6)(C_(5)H_(5)N)_(3)]^(+))with the anion[PMo_(12)O_(40)]^(3−).Further interaction of Composite 1 and single-walled carbon nanotubes(SWNTs)resulted in the formation of a novel Composite 1/SWNT nanocomposite through a facile one-pot strategy,in which the Composite 1 clusters were uniformly grown onto the surface of SWNTs.The as-prepared Composite 1/SWNT nanocomposite showed outstanding electrochemical performance as an anode material of LIBs by delivering a storage capacity of 1012 mA h g^(−1)at 100 mA g^(−1)for 100 cycles.The results may open a new pathway for exploring novel anode materials of LIBs.展开更多
基金supported by the National Nature Science Foundation of China(21625101,21521005)the National Key Research and Development Program of China(2017YFB0307303)the Fundamental Research Funds for the Central Universities(XK1802-6,XK1803-05,XK1902,12060093063).
文摘Polyoxometalate(POM)-based molecular cluster batteries have attracted wide interest due to their rich redox properties.To date,no studies on POM-based ionic crystals for LIBs have been reported,although the redox-active metals can be incorporated and finely tuned in the ionic crystals.Herein,a POM-based ionic crystal(denoted as Composite 1)was prepared for the first time by the complexation of the trinuclear acetate-bridged cobalt-containing macrocation([Co_(3)O(CH_(3)CO_(2))_(6)(C_(5)H_(5)N)_(3)]^(+))with the anion[PMo_(12)O_(40)]^(3−).Further interaction of Composite 1 and single-walled carbon nanotubes(SWNTs)resulted in the formation of a novel Composite 1/SWNT nanocomposite through a facile one-pot strategy,in which the Composite 1 clusters were uniformly grown onto the surface of SWNTs.The as-prepared Composite 1/SWNT nanocomposite showed outstanding electrochemical performance as an anode material of LIBs by delivering a storage capacity of 1012 mA h g^(−1)at 100 mA g^(−1)for 100 cycles.The results may open a new pathway for exploring novel anode materials of LIBs.
