Hybrid supercapacitor with nano-TiP2O7 as intercalation electrode

作者：Aravindan V; Reddy M V; Madhavi S; Mhaisalkar S G; Rao G V Subba; Chowdari B V R^*

来源：Journal of Power Sources, 2011, 196(20): 8850-8854.

DOI：10.1016/j.jpowsour.2011.05.074

• Hybrid supercapacitor
• Lithium ion battery
• TiP2O7
• Activated carbon

Nano-size (<= 100 nm)TiP2O7 is prepared by the urea assisted combustion synthesis, at 450 and 900 degrees C. The compound is characterized by powder X-ray diffraction, Rietveld refinement, high resolution transmission electron microscopy and surface area methods. Lithium cycling properties by way of galvanostatic cycling and cyclic voltammetry (CV) showed a reversible and stable capacity of 60 (+/- 3) mAh g(-1) (0.5 mole of Li) up to 100 cycles, when cycled at 15 mA g(-1) between 2-3.4 V vs. Li. Non-aqueous hybrid supercapacitor, TiP2O7 (as anode) and activated carbon (AC) (as cathode) has been studied by galvanostatic cycling and CV in the range, 0-3 Vat 31 mA g(-1) and exhibited a specific discharge capacitance of 29 (+/- 1)Fg(-1) stable in the range, 100-500 cycles. The Ragone plot shows a deliverable maximum of 13 Wh kg(-1) and 371 W kg(-1) energy and power density, respectively.

• 出版日期2011-10-15
• 单位南阳理工学院